this post was submitted on 03 Jun 2024
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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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[–] [email protected] 20 points 5 months ago (14 children)

2.5" disks are SMR, you don't want that in a raid.

[–] [email protected] 9 points 5 months ago (6 children)
[–] [email protected] 15 points 5 months ago (4 children)

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.

[–] [email protected] 6 points 5 months ago* (last edited 5 months ago) (1 children)

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.

[–] [email protected] 1 points 5 months ago

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

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