April 12, 20224 yr I have 2 3 tb parity drives. One is starting to have a lot of errors that were discovered during a parity check yesterday. Can I start the array back while preclearing the replacement drive? I would have to connect the replacement in the same slot as I have no free sas connections in which to perform the preclear. Is this the correct order? Stop array turn off server uninstall bad drive install replacement start server start preclear with unassigned devices plugin start and use array until preclear finished stop array select replacement as new 2nd parity drive start parity check start array when finished enjoy? Thanks in advance.
April 13, 20224 yr Solution Skip the preclear, just replace the drive, build parity, do a parity check, do a long smart test on the drive. Preclear is not productive for your situation, you want to get valid parity back in place ASAP. If you had a new drive in anticipation of replacing a drive that was still functioning, then preclear might be of some value, but only as a stress test to weed out infant mortality. You will get that same level of testing by rebuilding the drive and checking parity, and the bonus is you will be protected that much sooner. If the new drive fails during the process, you aren't in any worse shape, just back to needing another drive. If you were getting a new drive to ADD to a NEW data slot, not replacing a drive, then preclear could save some time as well as give you a confidence check in the drive before trusting it in the array. This does not apply to your situation.
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