On Thursday, 21 May 2026 10:19:17 pm Australian Eastern Standard Time Michael Tokarev wrote: > If you have 3 HDDs for RAD1, it's much better and reliable to use > 3-way raid1 from the beginning, instead of 2-way raid1 + hot spare. > This way you eliminate the thin ice in here: if one drive dies and > you'll have just one copy left, the probability to encounter second > failure (which is now fatal!) increases significantly, since during > recovery, *whole* remaining drive has to be read, including areas > which hasn't been touched for long, and where you might face some > bad sectors. And recovering from *that* situation is significantly > more difficult. > > When you've 3-way raid1, symmetrical, instead, everything works as > it should be. And as a bonus, you have better read performance (but > at a price of very slightly worse write performance). > > Also, none of the disasterous scenarious you outlined, wont occur.
You mean something like "--level=1 --raid-devices=3" ? I did not know that mdadm supports such configuration. Excellent point, thanks. -- Best wishes, Dmitry Smirnov GPG key : 4096R/52B6BBD953968D1B --- Freedom is lost gradually through uninterested, uninformed, uninvolved people.
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