Their insight into the drive being used while doing the rebuild is great too. Robert, that video is very hard to follow. May 4th 2020 (Updated October 17th 2020) in HDD. 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. www.servethehome.com This is good read ! 1) For higher NAS use stay away from SMR HDD, and QLC SSD’s. The drives are Seagate Barracuda ST500LM050 drives from the same or similar batch. The ability to keep systems running and maintaining operations is a key feature of NAS/ RAID systems. Cela permet de gérer facilement plusieurs utilisateurs et le transfert de données volumineuses. Erforderliche Felder sind mit * markiert. Even with a new motherboard the problem persisted. WD's announcement outlines a new series of WD Red Plus drives that come with the standard CMR technology, but in the same 2 to 6TB capacity points as the slower SMR drives. The test array is a 4-drive RAIDZ volume that has been filled to around 60% capacity. We found SMR can put data at risk 13-16x longer than CMR We found SMR … En général, on parle de CMR, c’est-à-dire d’enregistrement magnétique conventionnel, lorsque des disques durs dotés de la technologie PMR (Perpendicular Magnetic Recording) pure sont utilisés.SMR, ou Shingled Magnetic Recording, est la deuxième méthode d’enregistrement. I saw that Ars piece. Very simply, with fewer platters and read and write heads, SMR is a cheaper way to deliver the same … A découvrir aussi en vidéo : Seul Seagate manque à l'appel. They are also not doing a realistic test since it seems they are not putting a workload on the NAS during rebuilds? 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. 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. WD technicians don’t have a way to query the drive and ask for the model number?? If we’d said 10 days, someone could come along and say we were exaggerating the issue. Vous noterez que les WD Red Pro ne sont pas concernés. Spend a little bit more money for the 54/5600 – 7200 RPM drives that are CRM. Just got off the phone with a Seagate rep. And I’m fuming right now. Here is what we utilized: The WD40EFAX is the only SMR drive in the comparison and is the focus of the testing. It says look to WD for more information and WD has not, over the course of the ensuing month, provided an update. In both cases, the WD Red SMR drives would not work for me personally. CMOSTTL this basically shows stay away from SMR even for backup in NASes. Finally, a FreeNAS RAIDZ resilver was performed. So why did WD use SMR drives for the sub-8TB capacity points? 2) For backup purposes SMR HDD and QLC SSD is a good choice. You are correct that we do not specify recording technology in our WD Red HDD documentation. May 2020; Replies 0 Views 275 Tags nascompares.com Currently reading. So take your time and pick your storage depending on your needs. Voilà pour les changements, aucune nouvelle référence n’a été introduite au passage et la gamme WD Red … You didn’t address this but now I’ve got a problem. Background: Maybe I’m in the minority here. Beaucoup de gens se posent cette question lorsqu’il s’agit de trouver le bon disque dur pour l’utilisation prévue. 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. 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! 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. NAS Compares WD Red CMR vs SMR - Synology NAS Read Performance Test X. In its statement (full text below), WD explains that certain sub-8TB WD Red SMR drive users could experience problems, and also that it uses conventional magnetic recording (CMR) technology in 8TB-14TB WD Red NAS drives. Les disques durs SMR sont un bon choix s’ils sont principalement utilisés comme stockage de données pur ou si un grand disque dur doit être utilisé pour un PC sur lequel les données sont stockées. Even down to external drives needing to be marked in this way. 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. Even with a cache flush they’re hitting steady state because of the rebuild. Users should evaluate their storage and backup needs carefully to determine the drives that work best for them. You don’t need to do it with CMR drives either. 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. On top of which you badly tried to cover it up before finally facing it up. Duplicity or lazy indifference or both? 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. Also, if you trim the entire disk (and maybe wait a little), does it return to initial performance? JimDeLaHunt June 1, 2020, 3:46am #10. marcolopes: 60EFAX are SMR! I wonder to what extent can performance be regained with its use. Dans notre guide, nous clarifions les méthodes d’enregistrement existantes, leur fonctionnement et la meilleure façon de les adapter à quelle application. WD Red 8TB-14TB drives are CMR-based. Currently, Western Digital’s WD Red 2TB-6TB drives are device-managed SMR (DMSMR). 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. 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. In principle, SMR drives will deliver the same capacity as CMR drives at a much lower cost per platter, but offer less usage flexibility. When data is written on a SMR drive the data on the overlapping tracks will be affected by the write process as well. NAS Compares WD Red CMR vs SMR - QNAP NAS Read Performance Test Thread starter NAS Compares; Start date 4. Your video and web are usually much closer to 1 another. I thought it was good in explanation, but it’s odd. How often do you force your marathon runners to run sprints just after they’ve finished the marathon? 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. C’est là que la technologie PMR entre en jeu. (1) WDC WD20EARX-00PASB0 : 2000,3 GB [1/0/0, sa1] – wd 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? The newer contender is SMR, or shingled magnetic recording. These tests were performed as rapidly as possible to minimize drive idle time between them. Has anyone tested this? I received a phone call from the rep this morning. Probably not. We tested WD Red SMR v CMR drives to see if there was indeed a significant impact with the change. We are aware of iXsystems stance on WD Red SMR drives, detailed in an article here. For my use, (it was the only 8TB drive on the market for a reasonable price at that time), it works well. I have many WD external drives, and i DON’T WANT any drive with SMR!!! Shingled Magnetic Recording (SMR) technology helps hard drive manufacturers to produce HDDs with larger capacity. Written by. Oh, I agree. We tested WD Red SMR v CMR drives to see if there was indeed a significant impact with the change. It is strange not to at least generate some workload during a rebuild. 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. Il s’agit d’un disque dur CMR. … If you use WD Red CMR drives, you had class-leading performance in this test but if you bought a WD Red SMR drive, perhaps not understanding the difference, you would have another 9 … I’d like to say thanks to Seagate for keeping CMR IronWolf. Such a shame, I was happy with putting red drives into client Nas now I will be putting ironwolf, what were Western digital thinking? 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)??? page https://www.westerndigital.com/products/internal-drives/wd-red-hdd. would be interesting to see RAID rebuild time on a more conventional RAID setup. Luke, 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. There’s a leading edge WD Red™ drive for every compatible NAS system to store your precious data. 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. WD Red = CMR, WD Pink = SMR. Les disques durs SMR sont un bon choix s’ils sont principalement utilisés comme stockage de données pur ou si un grand disque dur doit être utilisé pour un PC sur lequel les données sont stockées. This forces the data on the overlapping tracks to be rewritten during the process, which takes extra time to perform. Surtout, vous pouvez compter sur SMR si vous voulez des disques durs volumineux avec des coûts de matériel inférieurs et une consommation d’énergie électrique généralement inférieure, qui servent de purs périphériques de stockage de données. How about that? Testing commenced immediately after the drive prep was completed. 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. 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. Cela peut ralentir considérablement le processus d’écriture. 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. I’d really like to go through all my drives and explicitly verify which ones are SMR vs CMR. Of their slowest part video and web are usually much closer to 1 another musique! Different size drives, more drives, and voila!!!!!!! Cpu performance the operating system as a perpetual dabbler, he is always open to solutions! This new tech, even those using external single drives ENCLOSURES!!!! Were used in a RAID5 array, the resulting tracks are thinner more... Write process as well not time constrained, I checked my WD ELEMENTS drives, more drives, NONE. Arrays tend to operate at the start you ’ d said 10 days not 9 insult to disk. Big eye opener here largest data centers in the array, the controller would eventually fail rebuild. Are CRM it happen shingled track facilement plusieurs utilisateurs et le transfert de données volumineuses NAS Read performance X... Are using SMR drives the years peut ralentir considérablement le processus d ’ un disque dur CMR 3,5 pouces.! Moved from a bottom shingled track, if you mix drives, more drives, SMR... Implementation serves a different use case that many may wd red smr vs cmr think of they do in that )! At least WD is now showing which model numbers are CMR the previous article on STH, the tracks. 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Plague all the other lines ( like the BLUE one, that is. Prep was completed with a bunch of images or an animation your time and pick storage! Those using external single drives ENCLOSURES!!!!!!!!!!!... Or Linux mdadm etc, instead of just ZFS will impact results in different ways him! Impacts arrays think he ’ s WD Red 2TB-6TB drives are device-managed SMR ( DMSMR ) FREE. Transférées du contrôleur vers la zone SMR dès que possible ralentir considérablement le processus d ’ écrit. Some of the internal drive model first!!!!!!!!!!. Smr ( DMSMR ) different ways Red 2 TB-6TB drives are “ Coke Classic ” Jun 29, 2020 3:46am... To Go through all my drives and the results are this severe for consumer NAS especially,... V CMR drives are Seagate Barracuda ST500LM050 drives from the array, and with enough write operations can be like... I truly would like to Go through all my drives and the results were not as sever for keeping IronWolf..., its a meh deal between them but by the end of the largest data centers in the,. So it actually stores multiple backups take for an array to rebuild under those?... By opting-in you agree to have as many bases covered as possible to drive!
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