fstrim for LUKS2 encyrypted LVM
To my understanding, it makes no sense to perform a TRIM on storage
which is a LUKS2 encyrypted LVM. The storage device should anyway think
that each bit is in use after it was filled with random data when
creating the space. Not only that I cannot imagine how the storage
device should Know what is happening in the encrypted space, wouldn't it
be a security issue if the OS would inform the storage device about
unused space and its location and could actually perform some kind of a
TRIM?
Am I wrong?
If I am right, then, and assuming that TRIM is done by a command called
fstrim, is there a simple command by which I could search through all
cron entries if fstrim would somewhere be defined to become executed?
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