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05 April 2024, 19:05:47 UTC
Revision dd70e93a100c5f49455e5936a6d855b87c038642 authored by Guido Trentalancia on 16 December 2019, 10:45:18 UTC, committed by Guido Trentalancia on 16 December 2019, 11:01:22 UTC 
Many obsolete hard drives do not support the Synchronize Cache SCSI
 
command. Such command is generally issued during fsync() calls which
at the moment therefore fail with the ILLEGAL_REQUEST sense key.

Since this failure is currently treated as critical in the kernel SCSI
disk driver, such obsolete hard drives cannot be used anymore: they
cannot be formatted, mounted and/or checked using tools such as e2fsprogs.

Because there is nothing which can be done if the drive does not support
such command, such ILLEGAL_REQUEST should be treated as non-critical so
that the underlying operation does not fail and the obsolete hard drive
can be used normally.

This patch disables the Write Cache feature as a precaution on hard
drives which do not support the Synchronize Cache command and therefore
the cache flushing functionality.

Fixes bug: https://bugzilla.kernel.org/show_bug.cgi?id=203635

Signed-off-by: Guido Trentalancia <guido@trentalancia.com>
1 parent d1eef1c
History
Tip revision: dd70e93a100c5f49455e5936a6d855b87c038642 authored by Guido Trentalancia on 16 December 2019, 10:45:18 UTC
Many obsolete hard drives do not support the Synchronize Cache SCSI
Tip revision: dd70e93
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