March 6, 20251 yr Yet again, issues with parity. I've reached a point where advice is needed. Scenario .... upgrading my single 16TB parity drive to a larger 18TB drive. Simple eh. So, I ran a full parity check, all clear, on the existing drive. Unplugged old parity from existing cables and inserted larger drive. All went well, allocated new drive as parity and restarted in maintenance mode safe in the knowledge that my old 16TB drive could serve me well in case of problems. Parity sync running for hours then lost connection at around the 15hours to go stage. Nothing. Hooked up monitor, all dead. Fearing the worst I powered off and on and everything back as it was so away I went again. Same routine, maintenance mode and same thing happened although a little later in the sync process. So, I gave up and put it all back together with the old 16TB parity thinking I could ust switch and go. BUT ... I can reallocate the drive to parity but can't see any way to avoid having to resync and therefore losing parity on the old disk. That's not how I thought it worked. Can't see anywhere to say 'trust existing parity'. Am I missing something? What's the way forward without wiping out my trusted parity drive? Any advice would be appreciated. Thanks!
March 6, 20251 yr Community Expert Tools - New Config, then assign the old arity and check "parity is already valid" before array start.
March 6, 20251 yr Author I always knew there'd be a fix, thanks! So, new config, maintain all slots then the tick box. I'll let you know ...
March 6, 20251 yr Community Expert Unless you were trying to build parity in Maintenance mode, you should do a parity check after New Config just in case anything was written to your array while trying to build that other parity.
March 6, 20251 yr Author Solution On 3/6/2025 at 1:21 PM, trurl said: Unless you were trying to build parity in Maintenance mode, you should do a parity check after New Config just in case anything was written to your array while trying to build that other parity. That 'other' parity was done in maintenance mode, thanks. Update ... just to say that I did do exactly that AND it logged 23 errors from switching over parity disks i suppose. Still running the 'old'parity recheck as i write so absolutely nothing gained and fours days of electricity wasted ! On 3/6/2025 at 12:41 PM, superloopy1 said: I always knew there'd be a fix, thanks! So, new config, maintain all slots then the tick box. I'll let you know ... That did the trick, i'll not forget it, ta v.much! Edited March 7, 20251 yr by superloopy1
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