On 18/01/2023 at 10:57, Reindl Harald wrote:
Am 18.01.23 um 00:26 schrieb Pascal Hambourg:
in such implementations you have to consider
* file-systems with no trim-support
Not affected. A device does not need TRIM support to know which
blocks have been written and contain valid data
well, fstrim/discard don't do anything on a HDD at the FS layer
(Hard disks with SMR technology may support TRIM to avoid useless
read-modify-write operations, but SMR is not recommended for RAID so it
is a bit out-topic.)
Not sure I get your point. How is a filesystem with no TRIM support
related with a hard disk with no TRIM support ?
Currently the RAID layer does TRIM/discard pass-through only, so it
returns the status of the underlying devices. If it stored information
about which blocks contain valid data, I guess it would have to
advertise TRIM/discard support for itself regardless of the underlying
devices.
