Bug 15566 - SCSI Generic queueing info result never indicates direct data transfer?
SCSI Generic queueing info result never indicates direct data transfer?
Status: NEW
Product: IO/Storage
Classification: Unclassified
Component: SCSI
All Linux
: P1 normal
Assigned To: linux-scsi@vger.kernel.org
:
Depends on:
Blocks:
  Show dependency treegraph
 
Reported: 2010-03-17 22:39 UTC by Mike Hayward
Modified: 2014-06-24 17:10 UTC (History)
1 user (show)

See Also:
Kernel Version: 2.6.18-2.6.32
Tree: Mainline
Regression: No


Attachments

Description Mike Hayward 2010-03-17 22:39:26 UTC
The sg info result never returns a nonzero result despite
SG_FLAG_DIRECT_IO flag and aligned READ_10 and WRITE_10 data buffer.
Is direct io occuring as requested?  If not, why not?  If so, why
doesn't the info value behave as documented in the HOWTO?

I've run both over usb (which I can understand why not direct) and
to SATA drives that normally work fine with O_DIRECT read/write.
Comment 1 xerofoify 2014-06-24 17:10:04 UTC
This bug is against obsolete kernel. Try newer kernel to see if 
bug is fixed.
Thanks Nick

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