September 20, 20232 yr Hi everyone I currently have 1 x 12TB parity drive, 8 x 12TB data drives and 3 x 6TB data drives in one array. I have bought two 18TB drives. My plan is to replace parity with an 18TB drive to enable higher capacities, repurpose the previous 12TB parity drive as a data drive and finally, replace one of the 6TB data drives with an 18TB one. I could also replace the 6TB with the previous parity drive and add the 18TB as an additional drive if that is better for some reason My plan, which is based mostly on guessing, is: - Replace 12TB parity with 18TB and let it sync, temporarily leaving out the previous parity drive (or should I plug that back in simultaneously? No, right?) - Replace 6TB drive with 18TB drive and let it sync - Add the 12TB previous parity drive, let it zero it and add it to the array Is that the most efficient way to go about it? If not, why? Am I missing something important here? Am I doing anything potentially dangerous? And finally, would you do something else other than these three steps? Do note that I only have one additional free SATA/SAS connection in my server, so that limits what I can do. Also, those 6TB drives are ancient anyways, at least 8 years old, so I thought that it's about time I started replacing them, even if just with new 6TB drives (but of course I won't go for 6TB. Expansion is too tempting. This is the way) Cheers and thanks in advance! Edited September 20, 20232 yr by BlueBull
September 20, 20232 yr Community Expert Solution Nothing wrong with the steps you posted. It has the big advantage that in the first 2 steps you have the ‘removed’ drive intact in case something goes wrong. The array remains usable (albeit with reduced performance) during each step.
September 20, 20232 yr Author 3 hours ago, itimpi said: Nothing wrong with the steps you posted. It has the big advantage that in the first 2 steps you have the ‘removed’ drive intact in case something goes wrong. The array remains usable (albeit with reduced performance) during each step. Understood. Thank you for the feedback, I really appreciate it. I will proceed as planned then *edit* Oh I do have one, unrelated question if you don't mind. Any idea why the S.M.A.R.T power-on hours statistic for those ancient 6TB drives would only show 11256 hours of power-on time, while those drives have spent 2-3 years almost 24/7 powered on (no spindown) in my array and before that more than 6 years in a NAS used at a medium-sized enterprise? It has me scratching my head. My 12TB drives show about 55% of the power-on hours (6227 hours) of the 6TB ones and are about 1.5years old Edited September 20, 20232 yr by BlueBull
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