* writev to SCSI disks: Does sg work?
@ 2005-04-19 23:09 Dheeraj Pandey
0 siblings, 0 replies; only message in thread
From: Dheeraj Pandey @ 2005-04-19 23:09 UTC (permalink / raw)
To: linux-scsi
Hi!
I was wondering if I did a simple writev to a SCSI disk, does it take
the sg path to the device? I am guessing this sg (REQ_SPECIAL) is only
true for character devices (and ioctl's) and not block devices.
These are my questions:
- Is sg a common feature among SCSI disks these days? How do I know
what disks support this feature?
- How does one make writev work for SCSI disk (as a block device)
in direct_io?
- If I use SCSI disks as character device, can I use writev on the
character device file, and will sg codepath be taken?
Thanks
Dheeraj
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