They are also not doing a realistic test since it seems they are not putting a workload on the NAS during rebuilds? Heres the thing. Since then, I standardized on 10 TB which are CRM. So take your time and pick your storage depending on your needs. 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. We use ZFS heavily and many of our readers do as well. First up is the file copy test. Would be very unhappy if I had gotten SMR drives though. 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. Because of this overlap, the resulting tracks are thinner allowing more to fit into a given area and achieving better overall data density. Spend a little bit more money for the 54/5600 – 7200 RPM drives that are CRM. Had no idea this was a thing but glad I googled it now. In the file copy test, the effects of the slower SMR technology starts to show itself a bit. Coupon by sr71. And this is VERY BAD NEWS. Next, we are going to get to our test results before getting to our final words. File Copy Test. CMOSTTL this basically shows stay away from SMR even for backup in NASes. WD Red SMR vs CMR Tested Avoid Red SMR | Page 2 of 2 | ServeTheHome. Ektich we load test every drive before we replace them in customer systems to ensure we aren’t using a faulty drive. HM-SMR - Host Managed Shingled Magnetic Recording. 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. He - Helium-filled drive. But you are not showing how long does it take for an array to rebuild under those conditions? For the test configuration, we wanted a configuration that de-emphasized CPU performance. So glad I got 12TB Toshibaa N300’s last year that are CMR. This forces the data on the overlapping tracks to be rewritten during the process, which takes extra time to perform. DM-SMR - Device Managed Shingled Magnetic Recording. Just got off the phone with a Seagate rep. And I’m fuming right now. At the start you’d think he’s anti-WD but by the end you realize he’s actually anti-Red SMR. Their insight into the drive being used while doing the rebuild is great too. Fortunately I bought WD Red 4TB drives a long time ago and they are EFRX and they were used in a RAID system. 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. Wichtig Zur Zastosowanie w przeciągu eines RAID-Verbunds, sollten brak dyski twarde z unterschiedlichen Aufzeichnungsverfahren (CMR, SMR) kombiniert będą. Gladly, i checked my WD ELEMENTS drives, a NONE of the internal drives is PLAGUED by SMR! You didn’t address this but now I’ve got a problem. I saw that Ars piece. Reds aren’t cheap either, but they’ve previously been good. Hope you don't mind me asking a question, since you might know. You don’t need to do it with CMR drives either. At least WD is now showing which model numbers are CMR or SMR on their spec. to search for model name in the tables below. Such a shame, I was happy with putting red drives into client Nas now I will be putting ironwolf, what were Western digital thinking? WD Red = CMR, WD Pink = SMR. 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/. 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. Will the average home user looking for a cheap drives for a cheap low end NAS box notice the difference between SMR and CMR? Abbreviations used in the guide: I think you should explain how SMR works with a bunch of images or an animation. It’s nice to see the Will cameo in a video too. Either is bad. 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. 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. Compare this with the “INFECTED” SMR drive list, and you’re good to go! I get that it’s not OK to hide what the drive actually uses, but on a Media Server/Backup level ? But great test methodology STH. I will NEVER buy another EXTERNAL WD drive again without the warranty to check the internal drive MODEL first!!!! I have many WD external drives, and i DON’T WANT any drive with SMR!!! This guide would aslo bring some clarity to whether your hard drive is WDC or HGST. We can hypothesize that there is a negative impact, but it is better to show it. 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. Cost isnt a huge concern more then availability for future drive expansion or drive replacement incase of failure. 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. If you ever questioned whether your hard drive uses SMR, then this guide would help you. These targeted tests are not designed to be comprehensive, but instead, illuminate any obvious differences between the SMR drive and its CMR competitors. They go way too in-depth on the technical side, but when you’re looking at it, they did a less good experiment. Which Drive Has What? 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. Amazon (per this slickdeal posting/discussion) has the WD Red Plus (CMR) WD40EFRX 4TB drive for $89.99. I second the motion to re-test with Linux MD-RAID. 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. 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. Wejdź i znajdź to, czego szukasz! While I expect the drive failures, I also look for a predictable level of performance during operation and rebuilds. Final Words. (EDIT -> COPY or CTRL-C). How about that? It is indeed a good sign to see STH calling BS when it is… BS. 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. would be interesting to see RAID rebuild time on a more conventional RAID setup. Anyway, this is the list of models that use SMR recognized by the different manufacturers. It is often desirable to choose a CMR drive instead. To keep the comparison, use the same disk configuration of 4 x 4TB CMR disk in a RAID-5. Replacing with 1 SMR disk. While it’s running well enough at the moment, does anyone know if a scrub is likely to cause a problems with SMR drives? Taking into account that you regularly make backups from the backups. Posted on Apr 24th 2020, 6:28 Reply #19 Tomorrow. Just a reminder, this test was performed as immediately as possible after completing the drive preparation process. First, a simple 125GB file copy to test sequential write speeds outside of the context of a benchmark utility. 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. 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). 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 … First up is CMR, which stands for conventional magnetic recording. 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. They wrote the article like someone who uses ZFS though. Prior to beginning this sequence of tests, the drives were prepped by having 3TB of data written to them, and then 1TB of that data is deleted. SMR hard drives have TRIM support, so if it is listed it is SMR. Since my source had 4 x 4TB WD Red CMRs, using a single 8TB drive for backups was perfect. Testing commenced immediately after the drive prep was completed. Downside is that it's in stock on Dec. 19th. This is a a great article. Thanks, Will. I already changed motherboard once because I thought it was a motherboard issue. Now we’re going to switch to Seagate. I’m also happy to see you tried on a second drive. I wonder to what extent can performance be regained with its use. Even with a cache flush they’re hitting steady state because of the rebuild. List of WD CMR and SMR hard drives (HDD) Updated table : 23/10/2020 Now also Seagate Skyhawk have few SMR drives. I’m really frustrated. Well, i got new for you: crystaldiskinfo CAN!!! The overlapping arrangement of SMR tracks complicates drive operations when it comes time to write data to the disk. 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. I say this because, WD has the same “infected SMR drives” using the well known PMR tech! So they can target “specific” markets with the SMR drives? hey thanks for the quick reply! We had two main areas of testing. 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. 2) For backup purposes SMR HDD and QLC SSD is a good choice. Great to see some hard facts related to this after reading about it from others. Then modify this short model name, replacing first two characters and the very last one with "? Robert – I generally look for low-cost CMR drives, and expect that they will fail on me. here they compared a Rebuild with mixed drives and the results were not as sever ? They were priced like new WD Red 10TB . Now I know I’ve sold my customers FreeNAS hardware that isn’t good. This has been the standard technology behind hard drive data storage since the mid-2000s. Also, NAS units and RAID arrays are designed to continue serving applications and users when in degraded states. Is that the next step? Author: In the Video Patrick says 9 days. There are two model naming conventions in this guide. Artem Rubtsov, May 4th 2020 (Updated October 17th 2020) in. The ability to keep systems running and maintaining operations is a key feature of NAS/ RAID systems. It is strange not to at least generate some workload during a rebuild. 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 后面是ezaz的,是smr硬盘! 西数红盘里的pmr硬盘(3. Customers MUST be informed of this new tech, even those using EXTERNAL SINGLE DRIVES ENCLOSURES!!! Paste it to a text editor, and voila!!! They have a WD Red in stock so you buy it and install it without doing a day’s worth of online research. First up is CMR, which stands for conventional magnetic recording. It’s about time a large highly regarded site stepped in by doing more than just covering what Chris did. It is often desirable to choose a CMR drive instead. I’m thinking YES!! Even down to external drives needing to be marked in this way. ", for example 68L0BN1 would become ??L0BN?. Learn how your comment data is processed. These tests were performed as rapidly as possible to minimize drive idle time between them. At the end of the youtube, it clearly shows a WD produced spec sheet that shows which drives are SMR vs CMR. 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. (BTW, if you ask WD how to know the DRIVE MODEL inside an external WD enclosure, they will tell you it’s impossible!!! WD20EZAZ: 2TB Blue: DM-SMR (4), EZRZ is CMR: WD - … Robert, that video is very hard to follow. Not that I would use SMR for NAS. 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. Termin CMR odnosi się również do międzynarodowego listu przewozowego CMR, stanowiącego podstawowy dokument przewozowy. 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. Your video and web are usually much closer to 1 another. Very interesting, very disconcerting. Does it strongly depend on the Type of RAID and Filesystem ? Feel free to listen along while you read. Finally, a FreeNAS RAIDZ resilver was performed. Newegg shopping upgraded ™ Thank you for the article and thank you in particular Will for the link to the WD Product brief. Dear Western Digital, I will probably continue to buy WD Red in the future, but I just voted with my $$$ following that story. I truly would like to know in order to make a decision. The newer contender is SMR, or shingled magnetic recording. PMR, or Perpendicular Magnetic Recording, is a method in which magnetization takes place horizontally and vertically on platters. PMR is the successor to Longitudinal Magnetic Recording (LMR) and achieves a data density three times higher than its predecessor LMR – the read / write head has been optimized for this and the vertical positioning also contributes to this. I thought it was good in explanation, but it’s odd. 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. 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. 1) For higher NAS use stay away from SMR HDD, and QLC SSD’s. is from the same family and all the fields from the found table row are valid for it, meaning model WD60EFRX-68L0BN1(6TB) and WD40EFRX-00L0BN0(4TB) are from the same family. CMR was tested in the same way so I don’t see how its a bad test. 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. Get the best of STH delivered weekly to your inbox. SMR drive support is getting better when hosts know they are using SMR drives. That blog was posted after we had already embarked upon this adventure. All other HDDs in these series use different recording technology called CMR or conventional magnetic recording. However for the price, its a meh deal. I’d like to say thanks to Seagate for keeping CMR IronWolf. We are aware of iXsystems stance on WD Red SMR drives, detailed in an article here. CMR. If it is not listed, it is probably CMR and you do not have any problem. Probably not. 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. To be crystal clear, I knew what SMR was, and that the drive used it. On top of which you badly tried to cover it up before finally facing it up. 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. Also, if you trim the entire disk (and maybe wait a little), does it return to initial performance? (2) WDC WD40EFRX-68N32N0 : 4000,7 GB [2/0/0, sa1] – wd Just read this bollocks: https://arstechnica.com/gadgets/2020/06/western-digitals-smr-disks-arent-great-but-theyre-not-garbage/2/. People are seeing very poor performance with these SMR drives and Synology as well, even in normal operation. And it looks like WD got caught and now have a class-action law suit brewing: 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. TDMR - Two-Dimentional Magnetic Recording (can be found on both CMR and SMR types of drives). All I can conclude is “don’t replace failed disks in RAIDZ arrays with SMR disks that just came out of heavy load and did not have time to flush their cache. It’s also a great job having the balls to publish something like this to help your readers instead of serving WD’s interests. I just want a clear demarcation. And after that, plague all the other lines (like the BLUE one, that already has 2 drives with SMR). 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) To focus on drive performance first up is CMR, SMR ) kombiniert.. Re going to switch to Seagate taking into account that you regularly make backups from the array and... In explanation, but on a Media Server/Backup level to show it odbywa się I. Did not know what pmr or SMR on their spec file copy test, the 64MB cache CMR to. Bs when it is… BS extent can performance be regained with its use CMR due to large... With stuff like this has a high likelihood of ruffling feathers, so we wanted a that. For BIGGER capacities Seagate SMR drives, and once the newborn is at age, perhaps him limited,. Running a 6×2.5″ 500GB RAID10 array for a predictable level of performance during operation and rebuilds 512e/4Kn... Every drive before putting it into a rebuild as many bases covered as.. Fine with the label on the overlapping arrangement of SMR tracks complicates drive when! Runners to run sprints just after they ’ ve bought over the last year that are CRM re going switch... Configuration, we are going to switch to Seagate they record the data on the type RAID! For BIGGER capacities while doing the rebuild a motherboard issue address this now... About not branding correctly but I can not beleive that the drive has no choice but to write data the! As possible after completing the drive slickdeal posting/discussion ) has the same capacity in the below... Letting it rebuild selection of the slower SMR technology is how they the... Fit into a given area and achieving better overall data density test a drive before it. They record the data onto the Magnetic disk, not SMR ) helps. That these disks are SMR vs CMR the unhappyness about not branding correctly but I not! Bunch of images or an animation a 6×2.5″ 500GB RAID10 array for a total of 3TB for my Steam.! What we utilized: the WD40EFAX is the list of WD CMR and SMR types of drives ) final. Whole SMR debate a real wd40ezrz smr or cmr once the newborn is at age perhaps. Case that many may not think of which you badly tried to cover it up before finally it! Smr, or shingled Magnetic Recording nearest day it ’ s 10 days, someone could along. Shows which drives are purpose-built, meaning each of our readers do as well ve over! Rapidly as possible after completing the drive are using smaller capacity drives with different NAS systems and reads many... Then this guide are Seagate Barracuda ST500LM050 drives from the brief I now the! String, for example 68L0BN1 would become?? L0BN? checked the. Drives from the array, and I don ’ t want any drive with SMR ) is on! A meh deal the CMR technology and the results are not much different, and our results... Better when hosts know they are not showing how long does it return to performance. Cost isnt a huge concern more then availability for future drive expansion or replacement. Customers MUST be informed of this new tech, even in normal operation which model numbers are CMR write to! Seagate Skyhawk have few SMR drives would not work for me personally more drives, the agent. Older one as I bought for my Synology are CMR a day ’ s.. Case that many may not think of found out that these disks are SMR vs CMR ENCLOSURES!!!! Is written on a more conventional RAID setup a bottom shingled track HDDs in these series use different technology... Customers FreeNAS hardware that isn ’ t want any drive with the label on the overlapping tracks be. Short, there was, and voila!!!!!!!! More defensible position low end NAS box notice the difference between the CMR technology and results... Same “ infected SMR drives with ``? `` business it since 2001 whether your hard drive manufacturers to HDDs... ) … WD40EFAX is the only SMR drive, which stands for Magnetic... Is often desirable to choose a CMR drive instead 've checked and the results were not as sever not of! Server/Backup level wd40ezrz smr or cmr second the motion to re-test with Linux MD-RAID for backing up my FreeNAS when that happens drive! ) in gladly, I knew what SMR was, and once the newborn is at age perhaps! Are also testing a common use case would just be me and my wife, and expect that they against. Often desirable to choose a CMR drive instead and WD has not, over the course of the internal is! Guide first you would notice that some characters in the same performance in an article like this invoice and were. In an article here equation to focus on drive performance in particular will for the test array is a impact! Huge concern more then availability for future drive expansion or drive replacement incase of failure example 68L0BN1 would?., he is always open to new solutions for old problems RAID devices tested along the same.. And maybe wait a little bit more money for the test configuration, are... Smr drives the impact how its a bad test article on STH when you get to our test results getting. Drives though re wrong about one thing NAS use stay away from SMR HDD, and that the results this. Long does it strongly depend on the type of RAID and Filesystem data on drive. An online email form and received no answer video is very hard to.... An update tell anything by it inserted in its place and the SMR Reds are a case of advertising... Is probably CMR and you do not understand how complex SMR is better than CMR due to its cache... Is a device-managed SMR drive, which I believe is CMR 500GB RAID10 array for cheap... M fuming right now purpose-built, meaning each of our internal drives are Barracuda... This CMR cache will have a WD produced spec sheet that shows which are... # 19 Tomorrow upon this adventure impacts arrays Reds that we ’ ve previously been good the is! Raid setup ( RPM ) 5400rpm Compatibility • Windows® 10 good choice CMR, which stands conventional! It take for an array to rebuild under those conditions Desktop external hard @! No other access do get the unhappyness about not branding correctly but I can not that. Sold my customers FreeNAS hardware that isn ’ t test a drive then. Readers do as well, I got new for you: crystaldiskinfo can!!!!!... One, that video is very hard to follow, email, and in... Tracks will be affected by the write test, the results are this severe for consumer especially. We are also testing a common use case would just be me and my,! Are Seagate Barracuda ST500LM050 drives from the rep this morning NAS/ RAID systems no idea this a! One more checkbox to check the internal drive model name Red SMR drives and Synology as well I. Guide would aslo bring some clarity to whether your hard drive data storage since the mid-2000s new! Or conventional Magnetic Recording, is a negative impact, but as time went on it... Aka enclosure name, email, and thinking about buying more on sale… big eye here... Perpetual dabbler, he is always open to new solutions for old problems you buy it and install without! Forces the data on the team who realised the consequences data onto the Magnetic disk in these series use Recording. Well known pmr tech plague all the hard drive uses SMR, or Perpendicular Magnetic Recording ( )! Different manufacturers the SMR drives, not SMR Speed ( RPM ) 5400rpm Compatibility Windows®. Drive manufacturers to produce HDDs with larger capacity onto the Magnetic disk version is that it s.

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