From: Karthik Sarangan <karthiks@cdac.in>
To: linux-kernel@vger.kernel.org
Subject: O_DIRECT for block device
Date: Thu, 22 Sep 2005 13:51:16 +0530 [thread overview]
Message-ID: <4332697C.7070409@cdac.in> (raw)
I have a scsi hdd configured at /dev/sdb.
open("/dev/sdb", O_DIRECT) succeeds.
A 'read' or 'write' returns -1 and errno is EINVAL.
How to read and write data to it? They do not seem to work. I have a
262144 byte buffer for data transfer.
My kernel is 2.6.9-11 and I use RedHat Enterprise Linux.
next reply other threads:[~2005-09-22 8:27 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-22 8:21 Karthik Sarangan [this message]
2005-09-22 8:34 ` O_DIRECT for block device Avi Kivity
2005-09-22 8:40 ` Joel Becker
[not found] ` <43329590.3050006@cdac.in>
[not found] ` <20050922152028.GJ27375@ca-server1.us.oracle.com>
2005-09-23 5:36 ` Karthik Sarangan
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4332697C.7070409@cdac.in \
--to=karthiks@cdac.in \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox