P.S. It says look to WD for more information and WD has not, over the course of the ensuing month, provided an update.
While all three CMR drives comfortably completed the resilver in under 17 hours, the SMR drive took nearly 230 hours to perform an identical task. This thread attempts to pull together known SMR … It can be… BUT, before that happens, WD is probably using the most demanding customers / environments to TEST SMR tech so they can DEPLOY them in the bigger capacity DRIVES: 8, 10, 12, 14TB and beyond (do not currently exist). SMR has worse sustained write performance than CMR, which can cause severe issues during resilver or other write-intensive operations, up to and including failure of that resilver.
If you round to nearest day it’s 10 days not 9.
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.
And after that, plague all the other lines (like the BLUE one, that already has 2 drives with SMR). 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. We will not share your email with any third party companies. hey thanks for the quick reply! As you might know, all magnets have a North and a South pole. Details im Privacy Center und in der Liste unserer Partner.
To be crystal clear, I knew what SMR was, and that the drive used it. 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. SMR is a form of PMR (Perpendicular Magnetic Recording). From the brief I now know the 3TB drives I bought for my Synology are CMR.
It’s about time a large highly regarded site stepped in by doing more than just covering what Chris did. Der Schritt, die SMR-Technik durch die Neuverteilung der Serien vom restlichen NAS-HDD-Angebot abzugrenzen, geht aber aus Sicht der Redaktion in die falsche Richtung, da viele Kunden die Marke „WD Red“ mit uneingeschränkt NAS-tauglichen Festplatten verbinden. I had such a great week too. It is strange not to at least generate some workload during a rebuild. Mit Synology hat zudem der größte NAS-Hersteller Konsequenzen gezogen und die WD Red mit SMR als inkompatibel zu den eigenen Systemen markiert. 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, WD Blue SN550 1TB Review Inexpensive NVMe Taking on SATA, 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/. 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. 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. The newer contender is SMR, or shingled magnetic recording. 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/. SOHO ist die Abkürzung für „Small Office, Home Office“, für kleine Büros oder den Heimarbeitsplatz sieht Western Digital also kein Problem durch den Einsatz von SMR.
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. 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. First, a simple 125GB file copy to test sequential write speeds outside of the context of a benchmark utility.
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