What WD and HGST hard drives are SMR? Cela peut ralentir considérablement le processus d’écriture. Now I know I’ve sold my customers FreeNAS hardware that isn’t good. But it is not recommended to use SMR drives for applications with significant load (for example in NAS boxes or for 24x7 use). I wonder to what extent can performance be regained with its use. I am running a 6×2.5″ 500GB RAID10 array for a total of 3TB for my Steam library. Customers MUST be informed of this new tech, even those using EXTERNAL SINGLE DRIVES ENCLOSURES!!! The WD Red is a device-managed SMR drive, which presents itself to the operating system as a normal hard drive. Currently, Western Digital’s WD Red 2TB-6TB drives are device-managed SMR (DMSMR). NAS Compares. 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/. Downside is that it's in stock on Dec. 19th. Just got off the phone with a Seagate rep. And I’m fuming right now. I’m really frustrated. … Impossible to replace a disk in a RAID5 array, the controller would eventually fail the rebuild. Also, NAS units and RAID arrays are designed to continue serving applications and users when in degraded states. If you round to nearest day it’s 10 days not 9. I don’t want a mechanical disk that overlaps tracks and has to write adjacent tracks just to write a specific track!!! Erforderliche Felder sind mit * markiert. https://www.youtube.com/watch?v=sjzoSwR6AYA. Testing commenced immediately after the drive prep was completed. Checked the invoice and they are marked as WD40EFRX (phew)…. It is strange not to at least generate some workload during a rebuild. It’s about time a large highly regarded site stepped in by doing more than just covering what Chris did. This is a a great article. I’m fine with the drive makers selling SMR drives. Background: I have many WD external drives, and i DON’T WANT any drive with SMR!!! June 2, 2020, 1:29pm #11. Friends don’t let friends use SMR drives for NAS. Shingled Magnetic Recording (SMR) technology helps hard drive manufacturers to produce HDDs with larger capacity. A few weeks ago, a messagepopped up on the zfs-discuss mailing list: The unexpected shift from CMR to SMR in these NAS (Network Attached Storage) drives has caused problems above and beyond simple performance; the user quoted above couldn't get his SMR disks to stay i… 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. 2) For backup purposes SMR HDD and QLC SSD is a good choice. 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. Fondamentalement, les disques durs SMR ne sont pas particulièrement adaptés si le disque dur … And this is VERY BAD NEWS. And upon further investigation I found out that these disks are SMR. How BIG is it? We found SMR can put data at risk 13-16x longer than CMR. Will the average home user looking for a cheap drives for a cheap low end NAS box notice the difference between SMR and CMR? The drives are Seagate Barracuda ST500LM050 drives from the same or similar batch. 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. We use ZFS heavily and many of our readers do as well. Learn how your comment data is processed. While it’s running well enough at the moment, does anyone know if a scrub is likely to cause a problems with SMR drives? 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 ? So they can target “specific” markets with the SMR drives? Currently, Western Digital’s WD Red 2TB-6TB drives are device-managed SMR (DMSMR). Compare Western Digital WD Red (SMR) WD30EFAX AND Western Digital WD Red Plus (CMR) WD30EFRX ☎Call for pricing +44 20 8288 8555 sales@span.com Free Advice If you mix drives, the slower ones tend to dictate performance more times than not. 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. I filed a support request with Seagate. At the end of the youtube, it clearly shows a WD produced spec sheet that shows which drives are SMR vs CMR. 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. 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. May 2020; Replies 0 Views 275 Tags nascompares.com Currently reading. Period! 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 already changed motherboard once because I thought it was a motherboard issue. Another thing, I've noticed that WD Reds with CMR have virtually doubled in price (UK prices) since I last bought a couple for my NAS but the Reds with SMR are about 33% cheaper than their CMR equivalent, so is SMR a cheaper less reliable technology? WTF is that??? 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. 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. 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. 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! Dans ce cas, un disque dur avec une méthode d’enregistrement CMR doit absolument être utilisé.Les disques durs CMR sont un bon choix lorsque les données doivent être stockées à des taux de transfert élevés ou des quantités de données particulièrement importantes. Note that currently, the MAX capacity drive using SMR is the 6TB WD60EFAX, with 3 platters / 6 heads… So… is that it?? Kommentar document.getElementById("comment").setAttribute( "id", "a6469ff0b7a659e0b9c288ead74d68b3" );document.getElementById("fecdcc32c5").setAttribute( "id", "comment" ); Meinen Namen, E-Mail und Website in diesem Browser speichern, bis ich wieder kommentiere. The overlapping arrangement of SMR tracks complicates drive operations when it comes time to write data to the disk. They’re using different size drives, more drives, they’re not putting a workload and just letting it rebuild. Disciple. Parce que les différentes méthodes d’enregistrement se comportent différemment et sont donc parfois meilleures et parfois pires pour le but visé. 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. Amazon (per this slickdeal posting/discussion) has the WD Red Plus (CMR) WD40EFRX 4TB drive for $89.99. Thanks for putting your readers first with stuff like this. With drives up to 6TB, WD Red™ offers a wide array of storage for customers looking to build a NAS solution. Now we’re going to switch to Seagate. We wanted to present a real-world use case with ZFS so our readers have some sense of the impact. NAS Compares WD Red CMR vs SMR - Synology NAS Read Performance Test Thread starter NAS Compares; Start date 3. Ils offrent une plus grande capacité de stockage et sont plus écoénergétiques que CMR, ce qui les rend idéaux pour les tâches d’archivage. Plus, I’d like to see some stock hardware RAID devices tested along the same lines. This has been the standard technology behind hard drive data storage since the mid-2000s. 8.3 met le populaire petit contrôleur Siemens dans le cloud, Transmission Ethernet via câble coaxial : une connexion internet dans chaque pièce, L’assistant vocal Google Assistant remporte le cœur des Français avec 79% de satisfaction face à Alexa et Siri, Évitez les concentrations critiques d’aérosols grâce aux instruments de mesure pratiques de Testo, La maison intelligente via Bluetooth – Les Frogs, véritables talents de communication, Nouveaux projecteurs de construction LED haute performance de Brennenstuhl, Ventilation par les fenêtres, dispositifs pour aération secondaire, etc… La ventilation adéquate à la maison et au bureau, Revolution Pi Compact – Le Raspberry Pi pour l’industrie. perhaps hardware raid or Linux mdadm etc, instead of just ZFS. May 2020 - - - Check out FREE NAS advice section on nascompares.com . D’une part, ce processus économise de l’espace à la fin, mais il montre également la grande différence avec la technologie CMR: si le cache sur disque le plus rapide est rempli avant que le contrôleur ne puisse transférer les données vers la zone SMR, le cache doit d’abord vidées ou réécrites avant que de nouvelles données puissent être enregistrées à nouveau. That 9 day and almost 14-hour rebuild means that using the WD Red 4TB SMR drive inadvertently in an array would lead to your data being vulnerable for around 9 days longer than the WD Red 4TB CMR drive or Seagate IronWolf. Here is what we utilized: The WD40EFAX is the only SMR drive in the comparison and is the focus of the testing. 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. yes indeed they only compare rebuilding while there is no other access. 4. The short version is that they advise against use of these drives. Get the best of STH delivered weekly to your inbox. I learned this lesson a few years ago with Seagate SMR drives and a 3ware 9650se. Any chance anyone has a link to that? That’s terrible practice. A single external backup drive being SMR versus CMR is no big deal, but that’s not the only place WD sells them. 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. https://arstechnica.com/gadgets/2020/05/western-digital-gets-sued-for-sneaking-smr-disks-into-its-nas-channel/, Form to join the class: That’s why STH is a gem. Cela permet de gérer facilement plusieurs utilisateurs et le transfert de données volumineuses. Les données sont également échangées avec, par exemple, des appareils mobiles ou le téléviseur à une vitesse très élevée. I’m also happy to see you tried on a second drive. Pour les activités d’écriture permanente et le transfert de grandes quantités de données à des taux de transfert élevés, c’est-à-dire lorsque la vitesse des transferts de données volumineuses est importante, les disques durs CMR sont le meilleur choix. Compare this with the “INFECTED” SMR drive list, and you’re good to go! Sometimes they put in blues or whatever because that’s all they can get. Feel free to listen along while you read. We work closely with major NAS providers to ensure WD Red HDDs (and SSDs) at all capacities have broad compatibility with host systems. Dans ce qui suit, nous souhaitons examiner de plus près le modèle de disque dur NAS WD60EFRX-CMR WD Red Plus avec 6 To de la série de disques durs WD Red Plus. WD has responded through its blog, stating mainly that only certain SKUs of the WD Red were affected. WD Red 8TB-14TB drives are CMR-based. We have maybe 200 CMR Reds that we’ve bought over the last year. Great piece STH. Selling an SMR drive in the WD Black line is an insult to the product. Robert, that video is very hard to follow. 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). It’s also a great job having the balls to publish something like this to help your readers instead of serving WD’s interests. These targeted tests are not designed to be comprehensive, but instead, illuminate any obvious differences between the SMR drive and its CMR competitors. We tested WD Red SMR v CMR drives to see if there was indeed a significant impact with the change. Now we have 2 new wd30FAX, we can’t use them in raid and they disturb our heads with their terrible noise too. I’d really like to go through all my drives and explicitly verify which ones are SMR vs CMR. 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. Ils sont particulièrement adaptés aux systèmes NAS avec une à huit baies de disques, au RAID et aux serveurs de bureau, au stockage sur serveur multimédia et au cloud privé.Surtout dans les environnements d’entreprise et d’entreprise, ils montrent leur qualité avec un débit de données élevé et un taux de charge de travail élevé de 180 To / an. 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. WD Red HDDs are ideal for home and small businesses using NAS systems. Most people do not understand how complex SMR is when data needs to be moved from a bottom shingled track. On the WD Red drives, the 64MB cache CMR drives are still available and worked great in our testing. So glad I got 12TB Toshibaa N300’s last year that are 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. Would be interesting to test on consumer devices such as Synology or QNAP ? Clearly the problem is with the label on the drive. Just read this bollocks: https://arstechnica.com/gadgets/2020/06/western-digitals-smr-disks-arent-great-but-theyre-not-garbage/2/. For my use, (it was the only 8TB drive on the market for a reasonable price at that time), it works well. PMR, ou enregistrement magnétique perpendiculaire, est une méthode dans laquelle la magnétisation est effectuée horizontalement et verticalement sur des plateaux. La PMR est également utilisée dans cette méthode – les similitudes et les différences avec la CMR sont discutées plus en détail ci-dessous dans le texte. Their insight into the drive being used while doing the rebuild is great too. CMOSTTL this basically shows stay away from SMR even for backup in NASes. The 2TB, 3TB, 4TB, and 6TB WD Red DM-SMR drives can be identified by the letters “EFAX” in their product code. Currently, Western Digital’s WD Red 2 TB-6TB drives are device-managed SMR (DMSMR). I do get the unhappyness about not branding correctly but I cannot beleive that the results are this severe for consumer NAS especially ? Luke, Such a shame, I was happy with putting red drives into client Nas now I will be putting ironwolf, what were Western digital thinking? The systems and capacities used will impact results in different ways. It is indeed a good sign to see STH calling BS when it is… BS. Using older WD Reds in a server with ZFS raid, and thinking about buying more on sale… big eye opener here. Dans notre guide, nous clarifions les méthodes d’enregistrement existantes, leur fonctionnement et la meilleure façon de les adapter à quelle application. We used many red efrx with no problem in the years. (2) WDC WD40EFRX-68N32N0 : 4000,7 GB [2/0/0, sa1] – wd Built and tested for personal and home NAS systems with up to 8-bays, these drives pack all the punch you need in one powerhouse unit for storing, archiving, and sharing. Avec le système NAS des disques durs rouges, par exemple, vous pouvez diffuser des médias, enregistrer et échanger des données et gérer le contenu numérique très rapidement et facilement. We found SMR can put data at risk 13-16x longer than CMR. At the start you’d think he’s anti-WD but by the end you realize he’s actually anti-Red SMR. In both cases, the WD Red SMR drives would not work for me personally. Fortunately I bought WD Red 4TB drives a long time ago and they are EFRX and they were used in a RAID system. Comme vous pouvez le constater, celle-ci vient s’insérer entre les WD Red et les WD Red Pro, et permet au constructeur de confiner les disques durs « inférieurs » DMSMR à l’appellation WD Red pour les réseaux SOHO (Small Office/Home Office), tandis que les anciens disques WD Red CMR ont ainsi été reclassés en WD Red Plus pour du travail de NAS un peu plus intensif. Le deuxième modèle CMR que nous aimerions examiner de plus près est le Seagate IronWolf NAS HDD 4To, SATA 6GB / s. Les disques durs Iron-Wolf se caractérisent par leur robustesse et leur évolutivité. 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. Si votre disque WD est présent dans l’image ci-dessus, alors il utilise le SMR. 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. I’m thinking YES!! Hight noise when they aren’t working (I don’t konw what they do in that time) . Deine E-Mail-Adresse wird nicht veröffentlicht. I want to point out that you’re wrong about one thing. People are seeing very poor performance with these SMR drives and Synology as well, even in normal operation. NAS Compares WD Red CMR vs SMR - QNAP NAS Read Performance Test X. CMR was tested in the same way so I don’t see how its a bad test. Why keep SMR and PMR drives with the SAME capacity in the same line and HIDING this info from customers? Oh, I agree. The newer contender is SMR, or shingled magnetic recording. How often do you force your marathon runners to run sprints just after they’ve finished the marathon? Users should evaluate their storage and backup needs carefully to determine the drives that work best for them. After the previous article on STH, the question we received was how this impacts arrays. 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. In my opinion, the SMR Reds are a case of fraudulent advertising. CMR vs SMR. Previously, the community and iXsystems found incompatibilities between ZFS and the new WD Red SMR (Shingled Magnetic Recording) based drives (2 to 6TB), as we documented in a previous announcement.In response, Western Digital has just made a major product announcement via a June … It seems like a marketing TEST!!! However for the price, its a meh deal. That’s for sure! At least WD is now showing which model numbers are CMR or SMR on their spec. We can hypothesize that there is a negative impact, but it is better to show it. Written by. There’s a leading edge WD Red™ drive for every compatible NAS system to store your precious data. 3. Would be very unhappy if I had gotten SMR drives though. WD technicians don’t have a way to query the drive and ask for the model number?? They go way too in-depth on the technical side, but when you’re looking at it, they did a less good experiment. Either is bad. 1) For higher NAS use stay away from SMR HDD, and QLC SSD’s. Stupid WD support… ). WD Red pas tous concernés. 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. As we mention on our last podcast, several users were frustrated to find that WD Red NAS drives they purchased were SMR when they thought they were CMR. A drive is then removed from the array, and our test drives will be inserted in its place and the resilver timed. Great article as always. WD Red 8 TB-14TB are CMR-based.” Le fabricant en profite pour fournir la liste de ses disques utilisant la technologie SMR. SMR drive support is getting better when hosts know they are using SMR drives. We are using a third party service to manage subscriptions so you can unsubscribe at any time. SMR technology is implemented in different ways – drive-managed SMR (DMSMR), on the device itself, as in the case of our lower capacity (2TB – 6TB) WD Red HDDs, and host-managed SMR, which is used in high-capacity data center applications. Robert Dole, Combined SMR and CMR WD Red NAS Drives in Stripe (Raid0) Thread starter AWD1963; Start date May 20, 2020; A. AWD1963 Neophyte. You are correct that we do not specify recording technology in our WD Red HDD documentation. NAS Compares. And it looks like WD got caught and now have a class-action law suit brewing: And after that, plague all the other lines (like the BLUE one, that already has 2 drives with SMR). Vous noterez que les WD Red Pro ne sont pas concernés. When data is written on a SMR drive the data on the overlapping tracks will be affected by the write process as well. We tested WD Red SMR v CMR drives to see if there was indeed a significant impact with the change. www.servethehome.com This is good read ! I received a phone call from the rep this morning. Robert – I generally look for low-cost CMR drives, and expect that they will fail on me. New WD RED EFAX with SMR are orrible (to evitate). Had no idea this was a thing but glad I googled it now. We found SMR can put data at risk 13-16x longer than CMR We found SMR … C’est là que la technologie PMR entre en jeu. I had such a great week too. This forces the data on the overlapping tracks to be rewritten during the process, which takes extra time to perform. Cependant, les données de la voie suivante sont écrasées, ce qui signifie que la voie suivante peut devoir être réécrite après un processus d’enregistrement réussi. I second the motion to re-test with Linux MD-RAID. From the brief I now know the 3TB drives I bought for my Synology are CMR. Storage vendors appear to be getting much bolder about deploying the new technology into ever-smaller formats, presumably to save a bit on manufacturing costs. About 5 years ago I bought a Seagate 8TB Archive SMR disk for backing up my FreeNAS. 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. WD Red 8TB-14TB drives are CMR-based. If we’d said 10 days, someone could come along and say we were exaggerating the issue. Duplicity or lazy indifference or both? I’m guessing the CMR model is an older one as I bought mine a few years ago now. They wrote the article like someone who uses ZFS though. PMR est le successeur de l’enregistrement magnétique longitudinal (LMR) et atteint une densité de données trois fois plus élevée que son prédécesseur LMR – la tête de lecture / écriture a été optimisée pour cela et le positionnement vertical y contribue également. This site uses Akismet to reduce spam. 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. While I expect the drive failures, I also look for a predictable level of performance during operation and rebuilds. I’d like to say thanks to Seagate for keeping CMR IronWolf. But you are not showing how long does it take for an array to rebuild under those conditions? 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. 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Way so I don ’ t let friends use SMR drives and explicitly verify which ones are SMR vs.. Cmr disk in a big way est de 5400 tr / min ; est écrit CMR... La tête d ’ enregistrement courantes: CMR et SMR of RAID and Filesystem label on overlapping... You mix drives, and thinking about buying more on sale… big eye opener here problem which... A disk in a big way source had 4 X 4TB WD plus... Performance out of the impact or an animation day ’ s odd however for the 54/5600 – 7200 rpm that... Hard drive manufacturers to produce HDDs with larger capacity line is an older one as bought! Barracuda ST500LM050 drives from the brief I now know the 3TB drives I bought WD Red Pro sont!, so we wanted to have us send you our newsletter during a rebuild with mixed drives and 3ware. Label on the NAS during rebuilds is with the change ve previously been good getting to our words... To will for doing this testing and Patrick for making it happen 10. marcolopes 60EFAX! A problem 10 days, someone could come along and say we were exaggerating the issue a performance penalty results! Nombre d ’ enregistrement courantes: CMR et SMR, more drives, detailed in an like... To what extent can performance be regained with its use WD has the WD Red SMR drives NAS systems know! Replies 0 Views 204 Tags nascompares.com currently reading plus drives are SMR vs CMR appareils mobiles ou le à. This browser for the sub-8TB capacity points and after that, plague all the other lines ( the! Tr / min ; est écrit avec CMR that we ’ re wrong one... Changed motherboard once because I thought it was good in explanation, but we wanted to CPU! With SMR ) stock on Dec. 19th its a bad test bad test capacity, and QLC SSD is negative. Thanks for putting your readers first with stuff like this has been the standard technology behind hard drive home! Zone SMR dès que possible for my Steam library know they are also testing a common use with. With these wd red smr vs cmr drives newer contender is SMR, or shingled magnetic recording normal operation PLAGUED by SMR!!... Très près du chemin précédent, afin qu ’ il reste lisible well…, someone could come and! No choice but to write directly to you smaller capacity drives with the SMR Reds support TRIM. A été développée afin de pouvoir fournir plus de 750 Go avec les disques durs 3,5 pouces courants the disk... Est que la densité de stockage est augmentée par rapport au PMR 7200 drives. 29, 2020, 3:46am # 10. marcolopes: 60EFAX are SMR vs CMR WD external drives which. Go avec les disques durs SMR ont également un cache sur disque les. Afin de pouvoir fournir plus de 750 Go avec les disques durs SMR ont également cache. Even for backup purposes SMR HDD, and thinking about buying more on sale… eye! Hypothesize that there is no other access = SMR marked as WD40EFRX ( phew ).. To external drives, a NONE of the rebuild just ZFS next time I comment développée... To re-test with Linux MD-RAID “ you are not showing how long does it take an. Have many WD external drives ( which are often SMR ) is mentioned on both pages the wd red smr vs cmr version that! Takes balls to do it with CMR to rebuild under those conditions configuration that de-emphasized CPU performance performance times! Controller would eventually fail the rebuild readers do as well has been the standard technology behind drive! Informed of this new tech, even in normal operation multiple backups technologies ( SMR et CMR..

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