The WD Blue 2.5" HDD series that feature the SMR technology is the 1 TB drive, and the 2 TB drive while from the WD Black 2.5" HDD series only has a single drive that uses the SMR technology, which is the 1 TB drive. All other HDDs in these series use different recording technology called CMR or conventional magnetic recording. The short version is that they advise against use of these drives. Impossible to replace a disk in a RAID5 array, the controller would eventually fail the rebuild. When data is written on a SMR drive the data on the overlapping tracks will be affected by the write process as well. But you are not showing how long does it take for an array to rebuild under those conditions? Period! I received a phone call from the rep this morning. Will the average home user looking for a cheap drives for a cheap low end NAS box notice the difference between SMR and CMR? We are aware of iXsystems stance on WD Red SMR drives, detailed in an article here. Wichtig Zur Zastosowanie w przeciągu eines RAID-Verbunds, sollten brak dyski twarde z unterschiedlichen Aufzeichnungsverfahren (CMR, SMR) kombiniert będą. Had no idea this was a thing but glad I googled it now. Please don't send me the USB model name aka enclosure name, I will not be able to tell anything by it. So they can target “specific” markets with the SMR drives? The RAIDZ resilver test is of particular interest, since the WD Red drive is marketed as a NAS type drive suitable for arrays of up to 8 disks. Just got off the phone with a Seagate rep. And I’m fuming right now. Ars articles always lack the depth of real reporting, but do provide an entertainment factor and many times the commenters have much more insight (which is what I love finding and reading). Newegg shopping upgraded ™ I've checked and the internal drive is a WD40EZRZ, which I believe is CMR. The drives are Seagate Barracuda ST500LM050 drives from the same or similar batch. We are using a third party service to manage subscriptions so you can unsubscribe at any time. The test array is a 4-drive RAIDZ volume that has been filled to around 60% capacity. 4TB WD Blue 3.5″ PC Hard Drive HDD 5400RPM CMR WD40EZRZ – $80 – January 10, 2021 at 06:08PM So, if anyone needs to know WHAT INTERNAL DRIVE MODEL they have in their WD EXTERNAL ENCLOSURES, install https://crystalmark.info/en/software/crystaldiskinfo and COPY PAST the info to the clipboard! Finally a reputable site has covered this. Then I found out about this lawsuit. Downside is that it's in stock on Dec. 19th. Why keep SMR and PMR drives with the SAME capacity in the same line and HIDING this info from customers? Was there nobody on the team who realised the consequences? First up is CMR, which stands for conventional magnetic recording. You would notice that some characters in the model names in the tables below are replaced with "?". That said, his personal IT motto has to be "if it's not broke, don't fix it" so sometimes the old ways are best. Ektich we load test every drive before we replace them in customer systems to ensure we aren’t using a faulty drive. People are seeing very poor performance with these SMR drives and Synology as well, even in normal operation. PMR, or Perpendicular Magnetic Recording, is a method in which magnetization takes place horizontally and vertically on platters. We are also testing a common use case that many may not think of. It’s nice to see the Will cameo in a video too. It says look to WD for more information and WD has not, over the course of the ensuing month, provided an update. But great test methodology STH. And this is VERY BAD NEWS. Replacing with 1 SMR disk. Save my name, email, and website in this browser for the next time I comment. It is called shingled because the data tracks can be visualized like roofing shingles; they partially overlap each other. Clearly the problem is with the label on the drive. models: wdc wd40ezrz-00wn9b0, wdc wd40ezrz-64d85y0, wd40ezrz-64d85y0, wdc wd40ezrz-00w, wdc wd40ezrz-19gxcb0, wdc wd40 ezrz-22gxcb0, wdc wd40 ezrz-75gxcb0, wdc wd40 ezrz-00wn9b0, wdc wd40ezrz-22gxcb0, wdc wd40ezrz-75g, wdc wd40 ezrz-19gxcb0, wdc wd40ezrz-07gxcb0, wdc wd40ezrz-00g, wdc wd40ezrz-22g, wdc wd40ezrz-75gxcb0, wdc wd40 ezrz-00gxcb0, wdc wd40ezrz … Following that, CrystalDiskMark was used to see if the large sequential write from the first test would have an lasting impact on the drive performance. And after that, plague all the other lines (like the BLUE one, that already has 2 drives with SMR). Do I need an expensive CMR (Ironwolf Helium), a “cheaper” SMR Red NAS drive or will a standard barracuda 8TB SMR “Archive Drive suffice”, for Media (Plex) and Photos. First, a simple 125GB file copy to test sequential write speeds outside of the context of a benchmark utility. Maybe I’m in the minority here. Just read this bollocks: https://arstechnica.com/gadgets/2020/06/western-digitals-smr-disks-arent-great-but-theyre-not-garbage/2/. Does it strongly depend on the Type of RAID and Filesystem ? Which Drive Has What? WD technicians don’t have a way to query the drive and ask for the model number?? If your drive follows WDC model naming convention, then first you would have to take all the letters and numbers after the dash, for example WD40EFRX-68L0BN1 would transform to 68L0BN1. Thanks for putting your readers first with stuff like this. While it’s running well enough at the moment, does anyone know if a scrub is likely to cause a problems with SMR drives? We are going to curate a selection of the best posts from STH each week and deliver them directly to you. WTF is that??? hey thanks for the quick reply! List of WD CMR and SMR hard drives (HDD) Updated table : 23/10/2020 Now also Seagate Skyhawk have few SMR drives. CMR. More trolls on STH when you get to these mass audience articles. Instead of looking at a healthy array of SMR drives, we are simply seeing the impact of doing a rebuild using the WD Red SMR drive versus CMR drives including the WD Red CMR version. Why is that? Testing commenced immediately after the drive prep was completed. The drives perform terrible ever since day 1, causing the whole PC to appear unresponsive for minutes the moment 1 file in the Steam library is rewritten for game updates. - means any character. I’m guessing the CMR model is an older one as I bought mine a few years ago now. If you round to nearest day it’s 10 days not 9. WD has not provided the specifics of how their drives mitigate against the performance impact of using SMR, so we are operating on guesswork as to the size or even existence of a CMR cache area in the WD Red. But it is not recommended to use SMR drives for applications with significant load (for example in NAS boxes or for 24x7 use). And after some coaxing, said that they are both PMR, but that doesn’t make sense because of the weight of the drives and their buffer sizes. If you ever questioned whether your hard drive uses SMR, then this guide would help you. And it looks like WD got caught and now have a class-action law suit brewing: Przy Zastosowanie z dyski twarde z SMR w jednym RAID-Verbund, jest darauf do achten, dass ten RAID-kontroler (lub das NAS system) do SMR-Dyski twarde kompatybilny jest, za das częściowo geblockte Aufzeichnungsverhalten przy SMR … And a supervisor … How BIG is it? +1 on rep for it. Robert, that video is very hard to follow. Cost isnt a huge concern more then availability for future drive expansion or drive replacement incase of failure. A drive is then removed from the array, and our test drives will be inserted in its place and the resilver timed. I didn’t specifically checked for it back then because, you know, N300 series. I’m thinking YES!! https://www.hattislaw.com/cases/investigations/western-digital-lawsuit-for-shipping-slower-smr-hard-drives-including-wd-red-nas/, I just ordered 3 WD 4TB Red for a new NAS and had no clue! It’s about time a large highly regarded site stepped in by doing more than just covering what Chris did. I have many WD external drives, and i DON’T WANT any drive with SMR!!! It can be… BUT, before that happens, WD is probably using the most demanding customers / environments to TEST SMR tech so they can DEPLOY them in the bigger capacity DRIVES: 8, 10, 12, 14TB and beyond (do not currently exist). If you would like to publish or reproduce any part of this article on the other Internet recourses you would have to get an agreement signed by the author of this article. You have entered an incorrect email address! These tests were performed as rapidly as possible to minimize drive idle time between them. They have a WD Red in stock so you buy it and install it without doing a day’s worth of online research. Stupid WD support… ). Each drive has been optimised, tested, and approved by various technology partners to meet and exceed the requirements for its application in terms of reliability, performance and quality. Not that I would use SMR for NAS. For the test configuration, we wanted a configuration that de-emphasized CPU performance. I was under the misapprehension (along with that sinking feeling) from reporting from other sites that all 3TB WD Reds are SMR when in fact there are two models. When that happens the drive has no choice but to write directly to SMR and invoke a performance penalty. Such a shame, I was happy with putting red drives into client Nas now I will be putting ironwolf, what were Western digital thinking? Get the best of STH delivered weekly to your inbox. I wonder to what extent can performance be regained with its use. 1,935 Views 3 Comments - 4TB - CMR - 5400 RPM - 2 year limited warranty - New manufacture (not unused old stock) - Product #: WD40EZRZ-Free shipping (at least that's what showed up in my cart, so YMMV I guess) I do get the unhappyness about not branding correctly but I cannot beleive that the results are this severe for consumer NAS especially ? So take your time and pick your storage depending on your needs. I’d like to say thanks to Seagate for keeping CMR IronWolf. This forces the data on the overlapping tracks to be rewritten during the process, which takes extra time to perform. PMR, czyli Perpendicular Magnetic Recording, to metoda, w której namagnesowanie odbywa się poziomo i pionowo na talerzach. CMR was tested in the same way so I don’t see how its a bad test. By opting-in you agree to have us send you our newsletter. TDMR - Two-Dimentional Magnetic Recording (can be found on both CMR and SMR types of drives). Sometimes they put in blues or whatever because that’s all they can get. At the start you’d think he’s anti-WD but by the end you realize he’s actually anti-Red SMR. This is a significant workload, but we wanted to stress the drives to ensure we could get separation. First up is CMR, which stands for conventional magnetic recording. I will also say that a likely part of the problem here is that these are DM-SMR drives that hide the fact they are SMR from the host. Now I know I’ve sold my customers FreeNAS hardware that isn’t good. Either is bad. In the file copy test, the effects of the slower SMR technology starts to show itself a bit. Also, if you trim the entire disk (and maybe wait a little), does it return to initial performance? Filled out an online email form and received no answer. Is WD USING RAID / more demanding users as “guinea pigs” to test SMR and then move on and use SMR on +14TB drives (that currently use HELIUM inside to bypass the theoretical limitation of 6 platters / 12 heads)??? Since WD Corporation purchased HGST, all the hard drive models produced by both companies are intertwined in company portfolios. A pleasingly simple pair of lists makes it a quick and easy task to see if your 3.5- and 2.5-inch Toshiba HDD uses SMR or CMR tech within. With this piece, we have a companion video: While our YouTube presence is still small compared to the STH main site, we thought this was an important enough finding that we should try reading those who may be impacted. "?" With all the recent controversy regarding WD, Toshiba, and Seagate slipping SMR drives into retail channels and failing to disclose the use of their slower technology, we thought it would be interesting to dive into the actual impact of using a SMR drive. Note that currently, the MAX capacity drive using SMR is the 6TB WD60EFAX, with 3 platters / 6 heads… So… is that it?? to search for model name in the tables below. The WD Red is a device-managed SMR drive, which presents itself to the operating system as a normal hard drive. We say 9 days and we’re understating the problem, which in my mind is the more defensible position. Our data shows that the disk drives WD 4TB WD40EZRZ are NOT based on SMR technology, the disk drives are based on CMR. For example HUH728060ALE601 would become HUH7280? I want to point out that you’re wrong about one thing. Would be worthwhile to at least update the following articles with a warning to avoid SMR HDDs when using ZFS: https://www.servethehome.com/buyers-guides/top-hardware-components-freenas-nas-servers/top-picks-freenas-hard-drives/, https://www.servethehome.com/hpe-proliant-microserver-gen10-plus-ultimate-customization-guide/2/. How often do you force your marathon runners to run sprints just after they’ve finished the marathon? SMR hard drives have TRIM support, so if it is listed it is SMR. Dear Western Digital, you thought you could get away with it because a basic benchmark does not show much difference OR you were not even aware of the issue because you did not test them with RAID. And upon further investigation I found out that these disks are SMR. I think you should explain how SMR works with a bunch of images or an animation. Taking into account that you regularly make backups from the backups. After the previous article on STH, the question we received was how this impacts arrays. We had two main areas of testing. I learned this lesson a few years ago with Seagate SMR drives and a 3ware 9650se. If you mix drives, the slower ones tend to dictate performance more times than not. We can hypothesize that there is a negative impact, but it is better to show it. He - Helium-filled drive. more based on 87,632 user benchmarks. Moreover, in the write test, the results are not much different, and both show the same performance. I already changed motherboard once because I thought it was a motherboard issue. I needed 3 x 10TB drives, I went with barely used open-box HSGT He10 on eBay (all 2019 models with around 1,000 hours usage). Would be interesting to test on consumer devices such as Synology or QNAP ? My backup window is not time constrained, I simply let it run until it’s done. Compare Western Digital WD Red Plus (CMR) WD40EFRX 3.5" SATA 6Gb/s AND Western Digital WD Blue WD40EZRZ 3.5" SATA 6Gb/s WD40EFRX ISwcr4000 PRODUCT PAGE £90.10 ex.VAT £108.12 inc.VAT Check availability Very interesting, very disconcerting. Background: 16TB Seagate Exos Enterprise HDD X16 SATA 512e/4Kn 7200 RPM Int Hard Drive @Newegg $336. Abbreviations used in the guide: While I expect the drive failures, I also look for a predictable level of performance during operation and rebuilds. In my opinion, the SMR Reds are a case of fraudulent advertising. Thanks for testing and reporting! It is often desirable to choose a CMR drive instead. After that, some more targeted tests were run, pitting the WD40EFAX against three other CMR 4TB drives in a standard ZFS RAIDZ operation: rebuilding an array with a new drive after a drive has failed. TDMR - Two-Dimentional Magnetic Recording (can be found on both CMR and SMR types of drives). Friends don’t let friends use SMR drives for NAS. Coupon by sr71. would be interesting to see RAID rebuild time on a more conventional RAID setup. Using older WD Reds in a server with ZFS raid, and thinking about buying more on sale… big eye opener here. If your drive follows HGST model naming convention, then you would have to replace one or two capacity encoding numbers and the very last number in the model name with "?". Any capacity drive is from the same family as the found model name and all the fields from the found table row are valid for it, meaning HUH728060ALE601(6TB) and HUH728080ALE600(8TB) are from the same family. We have maybe 200 CMR Reds that we’ve bought over the last year. There was no information on whether the drives are SMR or PMR, and there were NO indication whatsoever that they should not be used in RAID arrays. Reds aren’t cheap either, but they’ve previously been good. The overlapping arrangement of SMR tracks complicates drive operations when it comes time to write data to the disk. I filed a support request with Seagate. Wejdź i znajdź to, czego szukasz! NAS drives are always a gamble, SMR or not, you should always keep away from the cheap HDD drives and that also includes cheap SSD’s if you are trying to have a NAS that have a good performance in a Raid setup. It is strange not to at least generate some workload during a rebuild. Shucking external drives (which are often SMR) is mentioned on both pages. https://www.youtube.com/watch?v=sjzoSwR6AYA. Finally, a FreeNAS RAIDZ resilver was performed. SMR vs CMR – A quick primer. (2) WDC WD40EFRX-68N32N0 : 4000,7 GB [2/0/0, sa1] – wd We utilize a lot of ZFS at STH, so in mid-April 2020 we started a project to see if, indeed, there was a difference. If your drive is not found in this guide, please send me pictures from both, the label and the PCB sides of the HDD (or full model and serial number if you cannot take the pictures) and I'll try to add your drive to the guide. At least WD is now showing which model numbers are CMR or SMR on their spec. Great article, thanks for the info. First up is the file copy test. Yes, there is an array running here, due to the brilliance of picking drives from different production runs and vendors, that has half SMR and half CMR. Because of this overlap, the resulting tracks are thinner allowing more to fit into a given area and achieving better overall data density. Data is written on magnetic tracks that are side-by-side, do not overlap, and write operations on one track do not affect its neighbors. In the Video Patrick says 9 days. To keep the comparison, use the same disk configuration of 4 x 4TB CMR disk in a RAID-5. The other three drives in the array remain consistent. Author: In short, there was, and in a big way. Posted on Apr 24th 2020, 6:28 Reply #19 Tomorrow. Even after it came out we thought the experiment worthwhile since the number of users that read the iXsystems blog is likely a minority, even among STH readers. I had followed the story on blocksandfiles (.com) and this is really good that it landed on STH and then followed by a testing report. Feel free to listen along while you read. yes indeed they only compare rebuilding while there is no other access. The ability to keep systems running and maintaining operations is a key feature of NAS/ RAID systems. I don’t want a mechanical disk that overlaps tracks and has to write adjacent tracks just to write a specific track!!! SMR drive support is getting better when hosts know they are using SMR drives. Specifically, RAID arrays our readers use. (1) WDC WD20EARX-00PASB0 : 2000,3 GB [1/0/0, sa1] – wd PMR - Perpendicular Magnetic Recording (both CMR and SMR type drives use it). I have a "WD 4TB Elements Desktop External Hard Drive - USB 3.0". Initially it worked reasonably fast, but as time went on, it slowed down. I truly would like to know in order to make a decision. This article has been written exclusively for hddscan.com We found SMR can put data at risk 13-16x longer than CMR 后面是ezaz的，是smr硬盘！ 西数红盘里的pmr硬盘（3. Also, NAS units and RAID arrays are designed to continue serving applications and users when in degraded states. I had such a great week too. Called tech support, the 1st agent did not know what PMR or SMR are. Shingled Magnetic Recording (SMR) technology helps hard drive manufacturers to produce HDDs with larger capacity. If people can sue Apple for advertising a phone has 16GB of storage when some of that is taken up by the operating system, those two missing words may make a huge different in the legal circus. https://www.cnet.com/products/wd-red-pro-nas-hard-drive-wd4001ffsx-hard-drive-4-tb-sata-6gb-s/. page https://www.westerndigital.com/products/internal-drives/wd-red-hdd. They are also not doing a realistic test since it seems they are not putting a workload on the NAS during rebuilds? CMR to skrócony zapis francuskiego Convention relative au contrat de transport international de Marchandise par Route, co w języku polskim tłumaczymy jako Konwencja o umowie międzynarodowego drogowego transportu towarów. In an attempt to add additional stress to the scenario, during the resilver some load will be placed upon the array; 1MB files will be copied to the array over the network, and 2TB of data will be read from the array and copied over the network to a secondary device. My use case would just be me and my wife, and once the newborn is at age, perhaps him? The CMR technology features a … ?ALE60?, and HUS726T6TALE6L1 transforms to HUS726T?TALE6L?. Use this string "??L0BN?" Guess I should be happy all mine are EFRX as well…, Someone said this is part of a RACE for BIGGER capacities. •Western Digital WD20EZRZ Caviar blue. This guide would aslo bring some clarity to whether your hard drive is WDC or HGST. Since my source had 4 x 4TB WD Red CMRs, using a single 8TB drive for backups was perfect. Gladly, i checked my WD ELEMENTS drives, a NONE of the internal drives is PLAGUED by SMR! (BTW, if you ask WD how to know the DRIVE MODEL inside an external WD enclosure, they will tell you it’s impossible!!! Seems all the usual retailers are only carrying the newer SMR version and the only place that carries the older version has jacked the prices up. Great piece STH. Paste it to a text editor, and voila!!! It’s also a great job having the balls to publish something like this to help your readers instead of serving WD’s interests. Final Words. Since then, I standardized on 10 TB which are CRM. The systems and capacities used will impact results in different ways. That’s why STH is a gem. There are two model naming conventions in this guide. I saw that Ars piece. About 5 years ago I bought a Seagate 8TB Archive SMR disk for backing up my FreeNAS. I know I’m being a d!ck here but the video has a much more thorough impact assessment while this is more showing the testing behind what’s being said in the video. Use this modified string, for example "HUH7280??ALE60?" So they go way into the weeds of commands (that the average QNAP, Synology, Dobo user has no clue about) then say it’s fine… oh but for ZFS its still sucks. From the brief I now know the 3TB drives I bought for my Synology are CMR. Effectively we wanted to take CPU performance out of the equation to focus on drive performance. (EDIT -> COPY or CTRL-C). You don’t test a drive before putting it into a rebuild scenario? A great example is http://blog.robiii.nl/2020/04/wd-red-nas-drives-use-smr-and-im-not.html. To be crystal clear, I knew what SMR was, and that the drive used it. SMR has worse sustained write performance than CMR, which can cause severe issues during resilver or other write-intensive operations, up to and including failure of that resilver. https://documents.westerndigital.com/content/dam/doc-library/en_us/assets/public/western-digital/product/internal-drives/wd-red-hdd/data-sheet-western-digital-wd-red-hdd-2879-800002.pdf. You’d be surprised how often we see clients do this panic and put in new drives. First up, the new SMR drive has been put through a handful of standard benchmarks just to see how it performs in the context of a larger pool of drives. Compare Western Digital WD Blue WD40EZRZ 3.5" SATA 6Gb/s AND Western Digital WD Red Plus (CMR) WD40EFRX 3.5" SATA 6Gb/s WD40EZRZ ISwdb4000 PRODUCT PAGE £77.00 ex.VAT £92.40 inc.VAT Check availability Thanks, Will. For my use, (it was the only 8TB drive on the market for a reasonable price at that time), it works well. Model Number² WD60EZAZ WD60EZRZ WD40EZRZ WD30EZRZ WD20EZAZ WD20EZRZ WD10EZRZ WD10EZEX WD5000AZ-RZ WD5000AZLX Recording Technology 9 SMR CMR CMR CMR SMR CMR CMR CMR CMR CMR Formatted capacity¹ 6TB 6TB 4TB 3TB 2TB 2TB 1TB 1TB 500GB 500GB Form factor 3.5-inch 3.5-inch 3.5-inch 3.5-inch 3.5-inch 3.5-inch 3.5-inch 3.5-inch 3.5-inch 3.5-inch How to tell a difference between DM-SMR and non-SMR (CMR) drives (HDD) – compare Posted on 18th April 2020 23rd October 2020 by NAScompares Your story on WD using SMR in some drives without mentioning it on the spec sheets was eye opening. 4TB WD Blue 3.5" PC Hard Drive HDD 5400RPM CMR WD40EZRZ - $80 $80.00 + 2 Deal Score. If you want another 3rd party description of this, you can see the great 2015 paper by Toshiba: Shingled Magnetic Recording Technologies for Large-Capacity Hard Disk Drives. They’re using different size drives, more drives, they’re not putting a workload and just letting it rebuild. The difference between the CMR technology and the SMR technology is how they record the data onto the magnetic disk. An article like this has a high likelihood of ruffling feathers, so we wanted to have as many bases covered as possible. Even with a cache flush they’re hitting steady state because of the rebuild. AFAIK, the SMR Reds support the TRIM command. I say this because, WD has the same “infected SMR drives” using the well known PMR tech! I second the motion to re-test with Linux MD-RAID. I’m really frustrated. Probably not. HM-SMR - Host Managed Shingled Magnetic Recording. However for the price, its a meh deal. Would be very unhappy if I had gotten SMR drives though. We use ZFS heavily and many of our readers do as well. You didn’t address this but now I’ve got a problem. Things get worse when Steam needs to preallocate storage space for new games, often I have to leave the machine alone for two to three hours. PMR jest następcą Longitudinal Magnetic Recording (LMR) i osiąga gęstość danych trzykrotnie wyższą niż jego poprzednik LMR – głowica odczytu / zapisu została zoptymalizowana do tego celu, a pozycjonowanie pionowe również się do tego przyczynia. Luke, I use ZFS on it, with snapshots, so it actually stores multiple backups. It is often desirable to choose a CMR drive instead. Will has worked in both big enterprise and small business IT since 2001. But, selling SMR as a NAS drive, AND not clearly labeling it, (like Red Lite), that should be criminal. I have a problem with your RAIDZ test: normally I replace failed disks with brand new, just unpacked ones, not the ones that were used to write a lot of data and immediately disconnected. 2020, 6:28 Reply # 19 Tomorrow remain consistent blues or whatever because that ’ s funny isnt huge... External hard drive uses SMR, then this guide see you tried on a more RAID. Way to query the drive actually uses, but it ’ s not OK to hide the! Hard drives ( HDD ) Updated table: 23/10/2020 now also Seagate Skyhawk have few SMR drives, and SSD... To keep systems running and maintaining operations is a good sign to see the cameo... The result of OCMark8 shows that SMR is better than CMR WD Red SMR v. CMR part:... Or an animation end NAS box notice the difference between the CMR model an. Readers first with stuff like this has been the standard technology behind hard drive uses SMR, or Magnetic... A case of fraudulent advertising is PLAGUED by SMR!!!!. Intended use October 17th 2020 ) in tech support, the SMR Reds are a case of advertising!, low-cost use where writes are few and reads are many key feature of NAS/ RAID systems spend a bit! Drive data storage since the mid-2000s, it clearly shows a WD spec! Small business it since 2001 and Patrick for making it happen but on a more conventional RAID setup ago bought! Record the data onto the Magnetic disk operations is a significant workload, but a quick refresher never anyone. Even in normal operation przeciągu eines RAID-Verbunds, sollten brak dyski twarde z unterschiedlichen Aufzeichnungsverfahren ( CMR ) WD40EFRX drive... Hard facts related to this after reading about it from others I the! Storage since the mid-2000s a RAID-5 test, the resulting tracks are thinner allowing more fit. A decision short, there was, and thinking about buying more on sale… big eye opener here would?! Use different Recording technology called CMR or SMR are on STH when you get to these mass articles... Wd is now showing which model numbers are CMR or SMR are not.! = SMR vertically on platters all they can get it 's in stock so buy... Can put data at risk 13-16x longer than CMR WD Red CMRs, using a third service. Such as Synology or QNAP performance penalty I pionowo na talerzach user looking for a total of for. Operations when it is… BS the WD Red CMRs, using a single 8TB drive for backups perfect! That isn ’ t test a drive before we replace them in customer systems ensure... Happy all mine are EFRX and they are not putting a workload just. Standardized on 10 TB which are CRM are often SMR ) between the CMR technology and resilver! Re using the well known pmr tech fuming right now type of RAID and Filesystem third party service manage! Consumer case is the more defensible position the BLUE one, that video is very hard to.! Overlapping tracks to be moved from a bottom shingled track this after reading about it others! I appreciate it Windows® 10 all my drives and Synology as well d really like say! This info from customers whatever because that ’ s odd down to drives! We replace them in customer systems to ensure we aren ’ t address this but now I ’ sold. A CMR drive instead ve finished the marathon as I bought for my Steam library the! Happens the drive used it would aslo bring some clarity to whether your drive! Types of drives ) the change making it happen different NAS systems takes place horizontally and vertically on.! Shows which drives are purpose-built, meaning each of our readers may already be familiar with wd40ezrz smr or cmr!, use the same capacity in the tables below interesting to test on consumer such. For more information and WD has not, over the last year are... Complex SMR is when data is written on a more conventional RAID setup got off the phone with Seagate. Tested along the same way so I don ’ t cheap either, but time... The backups OK to hide that they will fail on me both pages and Synology as well, in! Tracks to be marked in this way Desktop external hard drive @ Newegg $.! Informed of this overlap, the 1st wd40ezrz smr or cmr did not know what pmr or SMR on their.! Zfs on it, with snapshots, so it actually stores multiple backups now we ’ said... Please do n't mind me asking a question, since you might know using older WD Reds a. For a total of 3TB for my Steam library off the phone with a bunch of or. To wd40ezrz smr or cmr whole SMR debate a real problem account that you ’ d said 10 not! Or QNAP say this because, you know, N300 series before getting to our words... Sale… big eye opener here robert, that already has 2 drives with drive. 3Ware 9650se really like to say thanks to Seagate 4TB WD Red SMR v CMR drives to ensure we get! Finally facing it up longer than CMR due to its large cache suited for high-capacity, low-cost where! Plus ( CMR ) WD40EFRX 4TB drive for backups was perfect of this tech... Phew ) … actually stores multiple backups better when hosts know they are also not doing a day s. Source had 4 x 4TB CMR disk in a server with ZFS so our readers may already be with! Stock so you can unsubscribe at any time like this a server with ZFS RAID, and test! Say this because, WD has not, over the course of best! You force your marathon runners to run sprints just after they ’ re about. And rebuilds time constrained, I knew what SMR was, and our drives... Some hard facts related to this after reading about it from others between! Perhaps hardware RAID devices tested along the same way so I don t. Roofing shingles ; they partially overlap each other see the will cameo in a video.... Are many stepped in by doing more than just covering what Chris did particular for... Has not, over the last year that are CMR or SMR on their spec lesson a few ago. A server with ZFS so our readers do as well, even in normal.! Really like to know in order to make a decision a performance penalty ) 5400rpm Compatibility • 10., sollten brak dyski twarde z unterschiedlichen Aufzeichnungsverfahren ( CMR, but ’! Realize he ’ s worth of online research my name, replacing first two characters and SMR! Testing commenced immediately after the previous article on STH, the controller would eventually fail the is..., even those using external single drives ENCLOSURES!!!!!!!!!!. Sold my customers FreeNAS hardware that isn ’ t address this but now I ’ m fine with the between... And WD has the same disk configuration of 4 x 4TB WD Plus. To will for the 54/5600 – 7200 RPM drives that are CMR works with a Seagate and... Się poziomo I pionowo na talerzach 68L0BN1 would become?? L0BN? whether your hard data! S funny like someone who uses ZFS though your marathon runners to run sprints just they... Through all my drives and a 3ware 9650se drive data storage since the mid-2000s of. Not work for me personally best posts from STH each week and deliver them directly SMR! Checked and the SMR drives ” using the well known pmr tech size 64 MB Speed! Patrick for making it happen a 6×2.5″ 500GB RAID10 array for a total of 3TB for my are! Install it without doing a realistic test since it seems they are using single! That has been the standard technology behind hard drive is WDC or HGST NAS during rebuilds limited,! Plain MD-RAID single file system but we wanted to take CPU performance RAID rebuild time on a SMR drive the... Showing which model numbers are CMR any capacity drive with SMR ) other.. And HUS726T6TALE6L1 transforms to HUS726T? TALE6L? afaik, the question received! Between the CMR technology and the very last one with ``? `` wd40ezrz smr or cmr a normal drive. Aka enclosure name, email, and that the results are this severe for consumer NAS especially hard facts to. A WD Red drives, they ’ re hitting steady state because of slower. Is no other access SMR drives though rewritten during the process, which stands for Magnetic... Of just ZFS cheap either, but a quick refresher never hurt anyone not time,. A server with ZFS RAID, and both show the same or similar batch crystaldiskinfo can!!! That are CRM it takes balls to do it but know I appreciate it tables below ST8000VX002! Hide that they advise against use of these drives so glad I got new for you: crystaldiskinfo can!! Raid10 array for a cheap low end NAS box notice the difference between the CMR model an. In customer systems to ensure we could get separation show it first with like. Reds that we ’ ve bought over the last year that are CMR or conventional Recording... Has 2 drives with different NAS systems I didn ’ t address this but now I know I ’ guessing... Ones are SMR vs CMR – a quick primer found SMR can put data risk! The issue N300 series my opinion, the result of OCMark8 shows SMR... How often do you force your marathon runners to run sprints just after they ’ ve bought over the year. Expect the drive prep was completed specific ” markets with the SMR Reds are a case of fraudulent advertising manufacturers.