Messages in this thread | | | Date | Fri, 22 Jan 2010 10:47:38 +0530 | Subject | libATA blacklist Crucial/Micron SSD M225 models due to NCQ errors? | From | Vishal Rao <> |
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Hello,
(please CC me in any replies as I'm not subscribed to the list).
I wonder if it's appropriate to blacklist the Crucial.com M225 family of solid state disks?
Could the following line be added to drivers/ata/libata-core.c around line 4276 (2.6.33-rc4) right alongside the "OCZ CORE_SSD" blacklist entry for ATA_HORKAGE_NONCQ ?
[code] { "CRUCIAL_CT128M225", NULL, ATA_HORKAGE_NONCQ }, [/code]
I'm assuming the first string param matches with the ID I see in the logs, the second param is for firmware ID and NULL means it will match all? This is just for the 128 GB model and there are also 64 and 256 GB models - I hope Crucial can revise their IDs to be variant agnostic and just return something like OCZ does like say "CRUCIAL_M225".
I have a 128 GB model CT128M225 and am running kernel 2.6.32 series that comes with Ubuntu Linux 10.04 Alpha 2.
There are regular kernel dmesg error/warning messages related to "ata1" (my SSD) including a "failed command READ FPDMA QUEUED". See http://pastebin.ubuntu.com/347122/
After some STFW-ing, I realised it's related to NCQ which the disk firmware (v1916) probably doesn't support/implement well.
Solution/workaround for me is to add " libata.force=noncq " to the kernel boot options so I am not too worried although I though if this goes into the kernel (and backported to .32 series which a lot of vendors plan to use or long term distro support) it would save a lot of headache for regular users who might dump Linux distros for other systems.
(please CC me in any replies as I'm not subscribed to the list).
Thanks, Vishal
-- "Thou shalt not follow the null pointer for at its end madness and chaos lie."
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