December 23, 20232 yr I have 30 x 4TB drives - all my sata/sas slots are filled right now. I have bought a few 12TB and 14TB drives and want to replace a bunch of the 4TB drives. Right now I am using unbalance to empty individual drives - then replace with the new larger drives. I have to do this one by one as all my sas/sata slots are filled. I have the option of installing another sas pcie card so I have more drive slots. However my array has maximum drives - so if I did this, I believe the new drives would have to be added as a cache pool. So... If I add the new 14TB & 12TB drives as a new cache pool... then transfer files from the array to this new cache pool... then remove the now empty array drives... will I then be able to simply reassign the new cache pool disks as array disk replacements and have the files accessible?
December 23, 20232 yr Community Expert 16 minutes ago, bitstoprint said: Right now I am using unbalance to empty individual drives - then replace with the new larger drives. I have to do this one by one as all my sas/sata slots are filled. Why not just do a standard replace and rebuild using parity? 17 minutes ago, bitstoprint said: So... If I add the new 14TB & 12TB drives as a new cache pool... then transfer files from the array to this new cache pool... then remove the now empty array drives... will I then be able to simply reassign the new cache pool disks as array disk replacements and have the files accessible? Yes if you create single drive pools, but then will need to do a new config and resync parity
December 23, 20232 yr Community Expert Do you have any parity drives? If so then remember no parity drive can be smaller than the largest data drive.
December 23, 20232 yr Author 33 minutes ago, JorgeB said: Why not just do a standard replace and rebuild using parity? Yes if you create single drive pools, but then will need to do a new config and resync parity I have no parity - files are replaceable - just a plex server So you're saying each new drive needs to be in its own cache pool - they can't be in a combined cache pool? - new config yes I'm familiar
December 23, 20232 yr Author 32 minutes ago, itimpi said: Do you have any parity drives? If so then remember no parity drive can be smaller than the largest data drive. no parity
December 23, 20232 yr Community Expert 1 minute ago, bitstoprint said: I have no parity - files are replaceable - just a plex server So you only have 28 array disks then, since you mentioned 30, I assumed dual parity.
December 23, 20232 yr Author 36 minutes ago, JorgeB said: So you only have 28 array disks then, since you mentioned 30, I assumed dual parity. sorry yes - 28 disks. How long do you think a parity would take to create for 108TB? Is there any chance it might be faster to create a parity and then rebuild rather than all this transferring time emptying 5 x 4TB drives? EDIT - just thought it probably won't allow me to add a 14TB drive to an array with 4TB parity...? so I guess this isn't an option Edited December 23, 20232 yr by bitstoprint
December 23, 20232 yr Community Expert 4 hours ago, bitstoprint said: How long do you think a parity would take to create for 108TB? That will depend mostly on the disks used and if there are any controller bottlenecks, for 4TB drives it should be around 8 to 10 hours, triple that for 14TB, assuming no bottlenecks.
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