Re: SATA errors accessing hidden partitions

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On Tue, Sep 10, 2019 at 11:12:36AM -0400, Bryan Gurney wrote:
> Oh, okay.  I'm pretty sure that blkid checks regions near the end of a
> device (for example, GPT has what looks like a backup of the "EFI
> PART" boot record near the end of the device).  Therefore, it may be
> worthwhile to double-check the size of the partition, in case they're
> not 4 GB, for some strange reason.

Some MD RAID suprblocks also are at the end.  Either way I'm pretty
sure this is legitimate probing and not a bug.

> Why is there an "Illegal Request - Unaligned write command" sense
> error from sd, right after the failed ata command "READ FPDMA QUEUED"?
>  Is this an expected failure mode for a read to a locked range?  (I'm
> not familiar with TCG Opal drives, so unfortunately I don't have
> enough context.)

It could be that we are just having issues translating the errors,
especially given that we don't use sense data in ATA except for ZAC
drives.



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