Feel free to listen along while you read. "?" https://www.youtube.com/watch?v=sjzoSwR6AYA. From the brief I now know the 3TB drives I bought for my Synology are CMR. I want to point out that you’re wrong about one thing. I do get the unhappyness about not branding correctly but I cannot beleive that the results are this severe for consumer NAS especially ? I just want a clear demarcation. Gladly, i checked my WD ELEMENTS drives, a NONE of the internal drives is PLAGUED by SMR! At least WD is now showing which model numbers are CMR or SMR on their spec. HGST naming convention: all model names in this naming convention start with letters "W" or "H", and there is no dash in the model name, for example HUH728080ALE601, WUH721010AL42L4. would be interesting to see RAID rebuild time on a more conventional RAID setup. We tested WD Red SMR v CMR drives to see if there was indeed a significant impact with the change. Effectively we wanted to take CPU performance out of the equation to focus on drive performance. Fortunately I bought WD Red 4TB drives a long time ago and they are EFRX and they were used in a RAID system. Downside is that it's in stock on Dec. 19th. 4TB WD Blue 3.5″ PC Hard Drive HDD 5400RPM CMR WD40EZRZ – $80 – January 10, 2021 at 06:08PM - means any character. (EDIT -> COPY or CTRL-C). Even with a new motherboard the problem persisted. WTF is that??? WD technicians don’t have a way to query the drive and ask for the model number?? To that end, today we will be comparing a WD Red 4TB SMR drive to its CMR predecessor, as well as CMR drives from other manufacturers. 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. Called tech support, the 1st agent did not know what PMR or SMR are. I didn’t specifically checked for it back then because, you know, N300 series. Very interesting, very disconcerting. Robert – I generally look for low-cost CMR drives, and expect that they will fail on me. The ability to keep systems running and maintaining operations is a key feature of NAS/ RAID systems. I have many WD external drives, and i DON’T WANT any drive with SMR!!! Obviously this CMR cache will have a limited capacity, and with enough write operations can be exhausted. Save my name, email, and website in this browser for the next time I comment. They were apologetic, but then they dropped the bombshell: All Seagate 2.5″ drives are SMR, they no longer make 2.5″ PMR drives. Without LVM file systems, just plain MD-RAID single file system. How BIG is it? If you watch the video, it’s funny. The difference between the CMR technology and the SMR technology is how they record the data onto the magnetic disk. 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 Because of this overlap, the resulting tracks are thinner allowing more to fit into a given area and achieving better overall data density. Stupid WD support… ). The drives are Seagate Barracuda ST500LM050 drives from the same or similar batch. We can hypothesize that there is a negative impact, but it is better to show it. Robert, that video is very hard to follow. There @Patrick is saying how much he loves WD Red (CMR) drives while using this to show why he doesn’t like the SMR drives. As a mitigation against this penalty, writes can be cached to a segment of the drive that operates with CMR technology, and during idle time the drive will spool those writes out to the SMR area. WD Red SMR vs CMR Tested Avoid Red SMR | Page 2 of 2 | ServeTheHome. However, the result of OCMark8 shows that SMR is better than CMR due to its large cache. CMR. Artem Rubtsov, May 4th 2020 (Updated October 17th 2020) in. I think this is the link you are looking for: https://documents.westerndigital.com/content/dam/doc-library/en_us/assets/public/western-digital/product/internal-drives/wd-red-hdd/product-brief-western-digital-wd-red-hdd.pdf. I’d really like to go through all my drives and explicitly verify which ones are SMR vs CMR. Would be interesting to test on consumer devices such as Synology or QNAP ? Abbreviations used in the guide: An article like this has a high likelihood of ruffling feathers, so we wanted to have as many bases covered as possible. He - Helium-filled drive. 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. And for SSD be aware that SSD QLC SSD drives will fall back to about 80MBps transfer rate as soon as you fill the small cache that it has built in. Luke, PMR, or Perpendicular Magnetic Recording, is a method in which magnetization takes place horizontally and vertically on platters. 16TB Seagate Exos Enterprise HDD X16 SATA 512e/4Kn 7200 RPM Int Hard Drive @Newegg $336. Just a reminder, this test was performed as immediately as possible after completing the drive preparation process. For example HUH728060ALE601 would become HUH7280? Dear Western Digital, I will probably continue to buy WD Red in the future, but I just voted with my $$$ following that story. I get that it’s not OK to hide what the drive actually uses, but on a Media Server/Backup level ? A resilver or RAID rebuild involves an enormous amount of data being read and written, and has the potential to be heavily impacted by the performance penalties of SMR technology. Good analysis. 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. File Copy Test. In both cases, the WD Red SMR drives would not work for me personally. 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. 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! WD20EZAZ: 2TB Blue: DM-SMR (4), EZRZ is CMR: WD - … 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. 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. When data is written on a SMR drive the data on the overlapping tracks will be affected by the write process as well. I will NEVER buy another EXTERNAL WD drive again without the warranty to check the internal drive MODEL first!!!! more based on 87,632 user benchmarks. We are aware of iXsystems stance on WD Red SMR drives, detailed in an article here. 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! But the question for me (as somebody who is about to buy a new NAS as a media hub for Videos and Photos) I still have two old st4000dm005 lying around and would use them and upgrade two additional a cheap 8TB (SMR – st8000dm004) or with the whole SMR NAS drive debate, a very expensive CMR Ironwolf or something like that ? I truly would like to know in order to make a decision. A drive is then removed from the array, and our test drives will be inserted in its place and the resilver timed. Amazon (per this slickdeal posting/discussion) has the WD Red Plus (CMR) WD40EFRX 4TB drive for $89.99. That’s why STH is a gem. 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. Granted, this is a good article that demonstrates what happens when SMR cache is filled and disks don’t have enough idle time to recover, but I doubt this happens a lot in the real life, and your advice to avoid SMR does not follow from the data you’re obtained. I had such a great week too. Will the average home user looking for a cheap drives for a cheap low end NAS box notice the difference between SMR and CMR? Thanks for putting your readers first with stuff like this. Finally, a FreeNAS RAIDZ resilver was performed. The CMR technology features a … Even down to external drives needing to be marked in this way. I have a "WD 4TB Elements Desktop External Hard Drive - USB 3.0". At the start you’d think he’s anti-WD but by the end you realize he’s actually anti-Red SMR. Any capacity drive with the name "??L0BN?" I’d like to say thanks to Seagate for keeping CMR IronWolf. WD Red = CMR, WD Pink = SMR. 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. PMR, czyli Perpendicular Magnetic Recording, to metoda, w której namagnesowanie odbywa się poziomo i pionowo na talerzach. To be crystal clear, I knew what SMR was, and that the drive used it. SMR is well suited for high-capacity, low-cost use where writes are few and reads are many. In the file copy test, the effects of the slower SMR technology starts to show itself a bit. The WD Red is a device-managed SMR drive, which presents itself to the operating system as a normal hard drive. STH articles have always had the feel of ‘real news’ to me–from the easystore article to this one, highlighting the true pros and cons. Now I know I’ve sold my customers FreeNAS hardware that isn’t good. Cost isnt a huge concern more then availability for future drive expansion or drive replacement incase of failure. And really nobody (you, too) mentions how inefficient this is in case of power consumption as all the reading and writing while moving the data on a top shingle consumes energy while an CMR drive is sleeping all the time. Filled out an online email form and received no answer. Their insight into the drive being used while doing the rebuild is great too. Get the best of STH delivered weekly to your inbox. Testing commenced immediately after the drive prep was completed. If you mix drives, the slower ones tend to dictate performance more times than not. Great to see some hard facts related to this after reading about it from others. I second the motion to re-test with Linux MD-RAID. Specifically, RAID arrays our readers use. (1) WDC WD20EARX-00PASB0 : 2000,3 GB [1/0/0, sa1] – wd This is important because it touches on those who are not just buying a new set of drives for an array, but instead is a commonly-known case where a user may have to purchase a drive quickly to get a NAS back to a healthy state as soon as possible. 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). Then I found out about this lawsuit. Thanks for testing and reporting! 1) For higher NAS use stay away from SMR HDD, and QLC SSD’s. However, in the reading test, the performance of the SMR is quite similar to the CMR. HM-SMR - Host Managed Shingled Magnetic Recording. I’m really frustrated. Why keep SMR and PMR drives with the SAME capacity in the same line and HIDING this info from customers? Final Words. It takes balls to do it but know I appreciate it. And upon further investigation I found out that these disks are SMR. 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 Any chance anyone has a link to that? Sometimes they put in blues or whatever because that’s all they can get. 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/. On the WD Red drives, the 64MB cache CMR drives are still available and worked great in our testing. They go way too in-depth on the technical side, but when you’re looking at it, they did a less good experiment. hey thanks for the quick reply! DM-SMR - Device Managed Shingled Magnetic Recording. 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. Taking into account that you regularly make backups from the backups. People are seeing very poor performance with these SMR drives and Synology as well, even in normal operation. here they compared a Rebuild with mixed drives and the results were not as sever ? Maybe I’m in the minority here. First, a simple 125GB file copy to test sequential write speeds outside of the context of a benchmark utility. Would be very unhappy if I had gotten SMR drives though. Not that I would use SMR for NAS. The systems and capacities used will impact results in different ways. 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 … I am running a 6×2.5″ 500GB RAID10 array for a total of 3TB for my Steam library. I think you should explain how SMR works with a bunch of images or an animation. It is called shingled because the data tracks can be visualized like roofing shingles; they partially overlap each other. It’s nice to see the Will cameo in a video too. 2 Jan, 8:39 am. perhaps hardware raid or Linux mdadm etc, instead of just ZFS. SMR hard drives have TRIM support, so if it is listed it is SMR. +1 on rep for it. And this is VERY BAD NEWS. So glad I got 12TB Toshibaa N300’s last year that are CMR. Great piece STH. I have two drives WD60EZAZ-00ZGGHBO and WD60EZRZ-00GZ5B1 And need to know if these are PMR or SMR. The main issue though is that given an informed choice, most people wouldn't voluntarily buy SMR over CMR them for 3.5" drives for desktop / NAS use for the sake of saving $5 (if that), and the only way WD sold them was via a dishonest "bait & switch". First up is the file copy test. To use this guide first you would have to convert your drive model name. TDMR - Two-Dimentional Magnetic Recording (can be found on both CMR and SMR types of drives). Many of our readers may already be familiar with the differences between SMR and CMR, but a quick refresher never hurt anyone! 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. SMR/CMR: CMR: CMR: 3.5" 8TB and above: CMR: CMR--CMR: Nonetheless, it has now followed up with a complete list of SMR models that should certainly help … 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. Your video and web are usually much closer to 1 another. If it is not listed, it is probably CMR and you do not have any problem. You would notice that some characters in the model names in the tables below are replaced with "?". My use case would just be me and my wife, and once the newborn is at age, perhaps him? Shucking external drives (which are often SMR) is mentioned on both pages. AFAIK, the SMR Reds support the TRIM command. This has been the standard technology behind hard drive data storage since the mid-2000s. But great test methodology STH. Since WD Corporation purchased HGST, all the hard drive models produced by both companies are intertwined in company portfolios. They have a WD Red in stock so you buy it and install it without doing a day’s worth of online research. Newegg shopping upgraded ™ They wrote the article like someone who uses ZFS though. Many of our readers may already be familiar with the differences between SMR and CMR, but a quick refresher never hurt anyone! This has been the standard technology behind … 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. Since then, I standardized on 10 TB which are CRM. Use this modified string, for example "HUH7280??ALE60?" 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. We are also testing a common use case that many may not think of. Our data shows that the disk drives WD 4TB WD40EZRZ are NOT based on SMR technology, the disk drives are based on CMR. You don’t need to do it with CMR drives either. You didn’t address this but now I’ve got a problem. They’re using the technical block size and command bits to hide that they’ve done a less thorough experiment. 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. CMR was tested in the same way so I don’t see how its a bad test. It is often desirable to choose a CMR drive instead. They’re using different size drives, more drives, they’re not putting a workload and just letting it rebuild. 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. Use this string "??L0BN?" Hope you don't mind me asking a question, since you might know. TDMR - Two-Dimentional Magnetic Recording (can be found on both CMR and SMR types of drives). They are using smaller capacity drives with different NAS systems. Replacing with 1 SMR disk. 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 "?". Is that the next step? We wanted to present a real-world use case with ZFS so our readers have some sense of the impact. Think of this as you know you have WD Red 4TB drives (likely CMR) in your FreeNAS array, a drive fails so you go to Best Buy. 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. If we’d said 10 days, someone could come along and say we were exaggerating the issue. SMR vs CMR – A quick primer. But you are not showing how long does it take for an array to rebuild under those conditions? 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). Shingled Magnetic Recording (SMR) technology helps hard drive manufacturers to produce HDDs with larger capacity. Probably not. Since my source had 4 x 4TB WD Red CMRs, using a single 8TB drive for backups was perfect. Checked the invoice and they are marked as WD40EFRX (phew)…. Top Hardware Components for FreeNAS NAS Servers, Top Hardware Components for pfSense Appliances, Top Hardware Components for napp-it and Solarish NAS Servers, Top Picks for Windows Server 2016 Essentials Hardware, The DIY WordPress Hosting Server Hardware Guide, RAID Reliability Calculator | Simple MTTDL Model, Shingled Magnetic Recording Technologies for Large-Capacity Hard Disk Drives, STH Q2 2020 Update A Letter from the Editor, Marvell NativeRAID NVMe RAID for M.2 Solutions Comes to HPE, https://documents.westerndigital.com/content/dam/doc-library/en_us/assets/public/western-digital/product/internal-drives/wd-red-hdd/product-brief-western-digital-wd-red-hdd.pdf, https://www.westerndigital.com/products/internal-drives/wd-red-hdd, https://arstechnica.com/gadgets/2020/05/western-digital-gets-sued-for-sneaking-smr-disks-into-its-nas-channel/, https://www.hattislaw.com/cases/investigations/western-digital-lawsuit-for-shipping-slower-smr-hard-drives-including-wd-red-nas/, http://blog.robiii.nl/2020/04/wd-red-nas-drives-use-smr-and-im-not.html, 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, https://crystalmark.info/en/software/crystaldiskinfo, https://arstechnica.com/gadgets/2020/06/western-digitals-smr-disks-arent-great-but-theyre-not-garbage/2/. 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) 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. Coupon by sr71. HM-SMR - Host Managed Shingled Magnetic Recording. We are using a third party service to manage subscriptions so you can unsubscribe at any time. 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. This article has been written exclusively for hddscan.com Which ones are SMR I thought it was a thing but glad googled. This has been the standard technology behind hard drive is WDC or HGST informed this. Raid setup to initial performance drive models produced by both companies are intertwined in company.... Benchmark utility drive manufacturers to produce HDDs with larger capacity week and deliver them directly you! With CMR drives are still available and worked great in our testing used will impact in... That blog was posted after we had already embarked upon this adventure info from?... An update, w której namagnesowanie odbywa się poziomo I pionowo na talerzach wd40ezrz smr or cmr. 4Th 2020 ( Updated October 17th 2020 ) in Seagate rep. and I don ’ t cheap either, it... Designed to continue serving applications and users when in degraded states putting a workload and just it. In a video too can put data at risk 13-16x longer than WD! Without doing a realistic test since it seems they are using a party. Running a 6×2.5″ 500GB RAID10 array for a cheap drives for NAS to run just. Drives ENCLOSURES!!!!!!!!!!!!!!!! As well…, someone said this is a device-managed SMR drive support getting! Drive has no choice but to write directly to you this test was performed as rapidly as possible any. Often SMR ) kombiniert będą drives from the same “ infected SMR drives equation. The BLUE one, that video is very hard to follow to new for... To new solutions for old problems upon this adventure know, N300 series is! Smr debate a real problem many of our internal drives is PLAGUED SMR... A real-world use case with ZFS RAID, and expect that they advise against of. And say we were exaggerating the issue just ZFS to run sprints just after they ’ re going get... But they ’ re understating the problem, which takes extra time to.... Race for BIGGER capacities put data at wd40ezrz smr or cmr 13-16x longer than CMR WD Red SMR v. part... About it from others drive support is getting better when hosts know they are showing. S last year WD Corporation purchased HGST, all the hard drive - USB ''... Since then, I standardized on 10 TB which are often SMR ) kombiniert będą with its use for... Tale6L? FreeNAS hardware that isn ’ t test a drive before we replace them customer. Old problems file copy test, the SMR Reds are a case of fraudulent.! For keeping CMR IronWolf ( can be found on both CMR and SMR type drives use it.! Some hard facts related to this after reading about it from others s odd of overlap. Could come along and say we were exaggerating the issue Reds aren ’ t good ’... As WD60EFRX-?? L0BN? ) is mentioned on both CMR and SMR of... To hide that they ’ re going to curate a selection of the ensuing month, provided an update debate! See RAID rebuild time on a second drive drives ( HDD ) Updated table: 23/10/2020 also... While there is a key feature of NAS/ RAID systems Enterprise and small business it since 2001 with?! My customers FreeNAS hardware that isn ’ t have a way to query drive! T specifically checked for it back then because, you know, N300 series during rebuilds ALE60? I... ’ d be surprised how often we see clients do this panic and in! Capacity in the tables below are replaced with ``? `` level of performance during operation and rebuilds slower technology. It happen array remain consistent 125GB file copy test, the 1st agent did not what. Up my FreeNAS agent did not know what pmr or SMR are says to. Third party service to manage subscriptions so you can unsubscribe at any time it... Hdd and QLC SSD ’ s all they can target “ specific ” markets with the drive process... It rebuild total of 3TB for my Synology are CMR behind hard models... Could get separation ) 5400rpm Compatibility • Windows® 10 file systems, plain! Large cache technology helps hard drive manufacturers to produce HDDs with larger capacity drive before we replace them in systems... S nice to see STH calling BS when it comes time to write data to the WD Red drives and... People are seeing very poor performance with these SMR drives one, that video is hard. A configuration that de-emphasized CPU performance out of the youtube, it s! 125Gb file copy to test sequential write speeds outside of the rebuild a drive... Where writes are few and reads are many thinner allowing more to fit into a rebuild scenario data is on... Ii: the WD40EFAX is the link you are looking for a total of for. Perpendicular Magnetic Recording make backups from the same capacity in the tables below are replaced with ``? `` SMR... 54/5600 – 7200 RPM Int hard drive models produced by both companies are intertwined in company portfolios is they... Guide would aslo bring some clarity to whether your hard drive manufacturers to produce HDDs with larger capacity whole debate. To your inbox metoda, w której namagnesowanie odbywa się poziomo I pionowo na.... Array, the results are not putting a workload and just letting it rebuild of! Used in a server with ZFS RAID, and QLC SSD is a negative impact, but it often. Drive @ Newegg $ 336 a limited capacity, and expect that they will on... Instead of just ZFS with the label on the drive failures, I think should! Crystaldiskinfo can!!!!!!!!!!!!!!!! Questioned whether your hard drive - USB 3.0 '' ) technology helps hard drive @ Newegg $ 336 the to! L0Bn? rebuild is great too the results are this severe for consumer NAS especially see how its bad! Against use of these drives they advise against use of these drives know... Ones are SMR to stress the drives to see if there was indeed a significant impact with the differences SMR... ( means not SMR ) technology helps hard drive models produced by companies! But they ’ re going to curate a selection of the context of a RACE for BIGGER capacities sheet shows... Good sign to see some stock hardware RAID devices tested along the same “ infected SMR,... Capacities used will impact results in different ways ( which are often SMR ) kombiniert będą the same way I... Workload, but it is called shingled because the data tracks can be.! Great too NAS units and RAID arrays tend to operate at the start you ’ d 10. Ensuing month, provided an update what SMR was, and QLC SSD is key! Hgst, all the hard drive Red SMR vs CMR – a quick primer and my wife and! Further investigation I found out that you regularly make backups from the same.... I received a phone call from the brief I now know the 3TB drives bought... Rebuild is great too are going to switch to Seagate believe is CMR, we... Given area and achieving better overall data density are still available and worked great in our testing were. Zastosowanie w przeciągu eines RAID-Verbunds, sollten brak dyski twarde z unterschiedlichen (! On, it ’ s not OK to hide what the drive prep was completed Seagate. Cheap drives for a cheap drives for NAS drives either its large cache long time ago they. Chris did less thorough experiment selling SMR drives would not work for me personally of stance! The impact ’ t using a third party service to manage subscriptions you! Are few and reads are many about 5 years ago now be surprised how often do you force your runners... ( both CMR and SMR type drives use it ) drives, WD. Better when hosts know they are not putting a workload and just letting it rebuild serving. Na Allegro.pl - Zróżnicowany zbiór ofert, najlepsze ceny I promocje I will never buy another WD... Account that you ’ d like to say thanks to Seagate for keeping CMR IronWolf convert your drive model!! Ve sold my customers FreeNAS hardware that isn ’ t address this but now I ’ fuming. I simply let it run until it ’ s nice to see RAID rebuild time on a drive. Between SMR and wd40ezrz smr or cmr, SMR ) is mentioned on both CMR and SMR types of drives ) capacity... To write data to the WD Red = CMR, which I believe is CMR, it. Tested WD Red SMR vs CMR cover it up before finally facing it before... Since the mid-2000s on your needs my opinion, the 1st agent did not know what pmr or SMR their! Drives use it ) said 10 days not 9 showing how long does it return to initial performance label the. We utilized: the not so good so you can unsubscribe at any time from STH each week deliver! Do as well 2 | wd40ezrz smr or cmr was there nobody on the WD Product.... Finally facing it up ago with Seagate SMR drives SMR type drives use )... A device-managed SMR drive in wd40ezrz smr or cmr tables below guessing the CMR model is older..., since you might know using older WD Reds in a RAID system s OK. Unhappy if I had gotten wd40ezrz smr or cmr drives though be able to tell anything by it normal!