From: Dheeraj Pandey <dheeraj@gmail.com>
To: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: writev to scsi disks
Date: Wed, 20 Apr 2005 08:01:53 -0700 [thread overview]
Message-ID: <363f92a8050420080112dec5db@mail.gmail.com> (raw)
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 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 (any capabilities published by the driver)?
- 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 simply use writev on the
character device file, and will sg codepath be taken?
next reply other threads:[~2005-04-20 15:01 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-04-20 15:01 Dheeraj Pandey [this message]
2005-04-20 21:15 ` writev to scsi disks James Bottomley
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