cinereus Posted October 22, 2020 Share Posted October 22, 2020 Just installed a new drive and can't for the life of me find how to preclear it. Googling the unraid wiki is no help and all pages on this forum or on YouTube are years out of date. Quote Link to comment
cinereus Posted October 22, 2020 Author Share Posted October 22, 2020 Apparently it's a docker. Which docker should we use? Quote Link to comment
trurl Posted October 22, 2020 Share Posted October 22, 2020 One of the preclears is a docker. There is also a plugin, and various script versions floating around. Preclear is really only for testing these days, since Unraid will clear a disk without taking the array offline, in those situations where a clear disk is required (hint: there is only one situation). Some people like to preclear new disks to test and hopefully weed out "infant mortality". I don't bother with preclear. 1 Quote Link to comment
trurl Posted October 22, 2020 Share Posted October 22, 2020 3 minutes ago, trurl said: those situations where a clear disk is required The one situation is when adding a disk to a new data slot in an array that already has valid parity. It clears the disk so parity will remain valid. A clear disk is all zeros and so has no effect on parity. Quote Link to comment
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