Replacing EOS drives? | NetApp | Page 1

royal kite Sep 24, 2024, 2:37 PM

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We have an E2860 - which is now old enough to contain some HDDs that are past EOS. We had an extension for this past year but that's running out.

We're going through the budgeting for a full replacement, but I'm looking for a "plan B" anyway.

So does Santricity support mixed disk types? i.e. if one of my 10TB E-X4111A drives fails, can another model of drive be used as a replacement?

We do have both 10TB and newer 12TB drives in the same pool, but I'm not sure how RAID works in this case. (It's all set to RAID-6)

vivid jewel Oct 7, 2024, 7:45 AM

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Generally speaking yes, you can mix disk sizes. If you have other 10TB or larger drives set up as spares they can cover a failure. If you have encryption/FIPS drives there are some rules that can apply so just be aware of that. When you say "pool" are you using DDP or traditional RAID6 groups?

wet agate Oct 9, 2024, 10:40 PM

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@royal kite, in DDPs, the additional capacity on the larger drives is not available. The usable capacity is the same as the smallest drive in the DDP. If you replaced every drive over time to be the larger capacity then you'd get more capacity in the pool, but not before then.

https://kb.netapp.com/on-prem/E-Series/SANtricity-OS-KBs/Does_the_mixed_capacity_disk_drive_can_be_added_to_the_DDP_Volume_Groups

royal kite Oct 18, 2024, 6:14 PM

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Wow, I forgot I even asked this. (Blame covid.)
I'd have to go back and look to see about DDP.

I figured that yes, if it does work at all, then you get whatever the smallest drive's capacity available. That's fine, just wanted to know what the options were.

#Replacing EOS drives?