Am 15.01.23 um 16:52 schrieb Reindl Harald:
to improve things, and actively supporting TRIM at the raid level is
such an obvious advance ...
but that is NOT the topic of a question "What DOES TRIM/discard in RAID do"
DOES versus COULD DO
Whether it's worth the effort is a different question ... :-)
BTW:
in such implementations you have to consider
* re-add of devices
* file-systems with no trim-support
* raw-devcie usage like for "apache trafficserver"
* power-outage
* drive replacements
god beware pass a wrong discard reuqest to the underlying device
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"
