SAS5 SAS6 etc. DMA alignment (hardware/firmware bug) - can Dell investigate this one please?

Tim Small tim at seoss.co.uk
Tue May 4 04:41:36 CDT 2010


Hi,

With respect to:

http://lkml.org/lkml/2010/4/26/335

https://bugzilla.kernel.org/show_bug.cgi?id=14831

It would appear that it's unsafe to carry out ATA-passthrough operations 
on SAS5* and SAS6* controllers (1068 / 1068E and others).

This definitely affects smartctl, and I'm assuming it has the potential 
to impact operations such as drive firmware updates - locking up the 
controller during a firmware update seems like it could be a Bad Thing.

Could someone at Dell take a look at this issue and see if their Linux 
firmware update packages could be impacted?  If they are impacted, I 
guess they should be withdrawn until a workaround can be put in place...

Thanks,

Tim.

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