Tejun Heo wrote:
Mark Lord wrote:
Hi Tejun,
Tejun Heo wrote:
Mark Lord wrote:
..
-- deliberate (or otherwise) errors via SG_IO will cause inappropriate
speed-downs.
No, only device errors issued via block layer are considered for speed
down (ATA_QCFLAG_IO). SG_IO commands will never trigger speed down
unless the error is HSM or timeout.
..
Mmmm... what category is "device rejected the command" (ABRT) ?
Is that HSM ?
Nope, that's UNK_DEV if the command is IO (came from block layer) and
cat-0 (don't care) if it has come from SG_IO.
..
Perfect, thanks!
Last question: what about CD/DVD writers?
Are the data-out commands for those done via block, or via SG_IO ?
(my memory fails me here).
Do they ever get speed up/down based on WRITE errors ?
Cheers
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