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Subject[081/197] libata: disable NCQ on Crucial C300 SSD
2.6.32-stable review patch.  If anyone has any objections, please let us know.


From: Tejun Heo <>

commit 68b0ddb289220b6d4d865be128939663be34959d upstream.

Crucial said,

Thank you for contacting us. We know that with our M225 line of SSDs
you sometimes need to disable NCQ (native command queuing) to avoid
just the type of errors you're seeing. Our recommendation for the
M225 is to add libata.force=noncq to your Linux kernel boot options,
under the kernel ATA library option.

I have sent your feedback to the engineers working on the C300, and
asked them to please pass it on to the firmware team. I have been
notified that they are in the process of testing and finalizing a
new firmware version, that you can expect to see released around the
end of April. We’ll keep you posted as to when it will be available
for download.

So, turn off NCQ on the drive w/ the current firmware revision.

Reported in the following bug.

Signed-off-by: Tejun Heo <>
Reported-by: Luke Macken <>
Signed-off-by: Jeff Garzik <>
Signed-off-by: Greg Kroah-Hartman <>

drivers/ata/libata-core.c | 3 +++
1 file changed, 3 insertions(+)

--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -4348,6 +4348,9 @@ static const struct ata_blacklist_entry
{ "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, },
{ "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, },

+ /* */
+ { "C300-CTFDDAC128MAG", "0001", ATA_HORKAGE_NONCQ, },
/* devices which puke on READ_NATIVE_MAX */

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