Re: What does TRIM/discard in RAID do ?

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Am 15.01.23 um 18:09 schrieb Wols Lists:
On 15/01/2023 16:01, Reindl Harald wrote:
there are more important things like keep the idiotic "/sys/block/md0/md/mismatch_cnt" at 0 and until that isn't solveable after decades don't risk my data with advanced experiments

however, that's all not part of the topic "What does TRIM/discard in RAID do"

Except - may I suggest you go back and read your very first reply to the OP - "trim makes no sense in the raid layer". YOU said, in effect, "it's not implemented because there's no point".

because i responded to the question "what does" and not "what would be nice"

This whole drift away from the subject was sparked by that comment - your comment - when in fact trim DOES make a lot of sense. It's a shame it isn't implemented

a lot of things would be nice - like people only talk about things the know at least a little bit

in conext of RAID and your "degraded reshape of a 4 drive RAID10 to RAID1 should be only a metadata update" i doubt that strongly



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