July 24, 2025Jul 24 Community Expert I am currently in an oddball position, that I'm battling my need to make things perfect, so please forgive me for the odd question.Current pool has 22 of 24 drives in a NetApp DS4246 disk shelf filled with 16TB drives.Drives are added in Mirror Pairs to a ZFS pool. 12 Mirror PairsOne of the remaining two drives has to be replaced (defective drive) before adding the last mirror pair.1) If I add two spare 18TB drives to these two slots, can this mirror pair be replaced/reduced to 16TB drives, when the replacement drive arrives?2) If not, can I add 1x 16TB and 1x 18TB? Then replace only the 18TB to a 16TB later?Open to other options as well.Thanks! Edited July 25, 2025Jul 25 by shelfactor
July 25, 2025Jul 25 Community Expert Solution 8 hours ago, shelfactor said:1) If I add two spare 18TB drives to these two slots, can this mirror pair be replaced/reduced to 16TB drives, when the replacement drive arrives?Nope.8 hours ago, shelfactor said:2) If not, can I add 1x 16TB and 1x 18TB? Then replace only the 18TB to a 16TB later?Yes.
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