On 10/9/23 02:56, charlesfdotz@xxxxxxxxxxxx wrote:
Hello,
I would like to request a new device manager layer be added that accepts trim requests for sectors and instead
writes zeros to those sectors.
This would be useful to deal with SMR (shingled magnetic recording) drives that do not support trim. Currently
after an SMR drive has had enough data written to it the performance drops dramatically because the disk must
shuffle around data as if it were full and without trim support there is no way to inform the disk which sectors
are no longer used. Currently there's no way to "fix" or reset this without doing an ATA secure erase despite
many of these disk being sold without informing customers that they were SMR drives (western digital was sued
for selling SMR drives as NAS drives).
Gosh, no, please don't.
SMR drives have a write pointer, and if the zone needs to be reset you
just reset the write pointer. Writing zeroes will result in the
opposite; the zone continues to be full, and no writes can happen there.
Which drive is this?
Cheers,
Hannes
--
Dr. Hannes Reinecke Kernel Storage Architect
hare@xxxxxxx +49 911 74053 688
SUSE Software Solutions GmbH, Maxfeldstr. 5, 90409 Nürnberg
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