On 07/21/2014 06:18 PM, John Utz wrote:
If I read Hanne's patch correctly, he is checking for the ZBC signature
> when the drives are probed.
Yep.
Thus, the only circumstance where adding zbc handling would lead to
> unexpected bad behavior in sd would be if a ZBC drive reported itself
> as a standard ATA drive or an ATA drive reported itself as a ZBC drive.
It's actually worse than that:
Currently libata will happily attach to a ZAC device, and passing them
on to the SCSI stack as a normal disk device.
Which most definitely will lead to unexpected results :-)
Cheers,
Hannes
--
Dr. Hannes Reinecke zSeries & Storage
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