Re: Issues with commit 34b48db6 ("block: remove artifical max_hw_sectors cap")

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On Tue, Dec 30, 2014 at 11:19:07AM -0500, Douglas Gilbert wrote:
> In SCSI, the VPD page 0xb0 (Block limits) has a "Maximum transfer
> length" field (32 bits long). Its units are logical blocks. Useful
> if >0 as 0 means "unreported".
>
> USB to SATA bridges should comply with SAT. However SAT and SAT-2
> don't even mention that VPD page. SAT-3 and SAT-4 mention that page
> but have "unspecified" next to that field. Basically useless.

Maybe we need to cap the max sectors value to something fairly low
unless we have the block limits VPD page and it contains useful information.
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