Swapping hdd's for SSD's 7400

3parnewb
Posts: 19
Joined: Mon Apr 18, 2022 3:27 am
Location: NL

Re: Swapping hdd's for SSD's 7400

Post by 3parnewb »

MammaGutt wrote:
3parnewb wrote:Yes I have 8 cages in total.

Can you also help me with how I can remove the HDD's + free up licenses the right way? Last time I just pulled a drive and that's not the way haha. Had to do a lot of repair.



Long story short you need to set the PDs to ldalloc off, then move all chunklets off the drive, remove spares before dismissing the PD.

I’ve seen a excel spreadsheet in this forum a few times but I never got the command that supposedly should move all chunklets for you to work….



Thanks a lot man!
3parnewb
Posts: 19
Joined: Mon Apr 18, 2022 3:27 am
Location: NL

Re: Swapping hdd's for SSD's 7400

Post by 3parnewb »

So everything worked out, which is great.

So now I have 12 drives spread across 6 cages. Richt now I'm running a Raid5 3+1 CPG. What would you recommend for CPG? It's a 4 node cluster, but I think I already mentioned that :)
MammaGutt
Posts: 1584
Joined: Mon Sep 21, 2015 2:11 pm
Location: Europe

Re: Swapping hdd's for SSD's 7400

Post by MammaGutt »

3parnewb wrote:So everything worked out, which is great.

So now I have 12 drives spread across 6 cages. Richt now I'm running a Raid5 3+1 CPG. What would you recommend for CPG? It's a 4 node cluster, but I think I already mentioned that :)


I’m no fan of RAID5 and your only option for RAID6 would be 4+2 with 33% RAID overhead.

If you accept RAID5, then 5+1 would be most efficient but it wouldn’t make a huge difference. 3PAR uses chunklets so the load would be distributed regardless.
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