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submitted 5 months ago* (last edited 5 months ago) by Sunny@slrpnk.net to c/selfhosted@lemmy.world

Been finding some good deals on 2.5 disks lately, but have never bought one before. Have a couple of 3.5 disks on the other hand in my Unraid server. Wondering how much it matters wether I get a 2.5 or not? What form factor do you prefer/usually go for?

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[-] Krafting@lemmy.world 9 points 5 months ago
[-] DarkDarkHouse@lemmy.sdf.org 15 points 5 months ago

SMR is a relatively new disk format technology that makes drives cheaper but writes slower, which can be noticeably bad in a NAS, especially if you are using a write-intensive RAID type. Most disk manufacturers will have drives meant for NAS like WD Red or Seagate Ironwolf, and they are almost all CMR and not SMR.

[-] ultimitchow@sh.itjust.works 7 points 5 months ago

i have had SMR drives slow to about 2MB/s with sustained sequential writes. "noticeably bad" really undersells how terrible they are.

[-] Stowaway@midwest.social 6 points 5 months ago* (last edited 5 months ago)

WD reds I believe are smr, wd red pros are cmr, or at least that was a thing for a while that WD did silently.

[-] DarkDarkHouse@lemmy.sdf.org 1 points 5 months ago

Indeed, it’s worth explicitly checking every drive you buy if you are using it in a NAS.

[-] Voroxpete@sh.itjust.works 1 points 5 months ago

Important note; some WD Reds are still SMR. You have to check which specific type.

[-] HMitsuha@sh.itjust.works 9 points 5 months ago

Shingled Magnetic Recording

Basically the write head writes over part of the magnetic track below the current track, reducing the physical size of each data and increasing how much data can be stored on one side of a disk.They’re bad for random writes because the drive would need to rewrite data in the track below it as well.

this post was submitted on 03 Jun 2024
171 points (97.2% liked)

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