From: Avi Kivity <avi@argo.co.il>
To: Karthik Sarangan <karthiks@cdac.in>
Cc: linux-kernel@vger.kernel.org
Subject: Re: O_DIRECT for block device
Date: Thu, 22 Sep 2005 11:34:59 +0300 [thread overview]
Message-ID: <43326CB3.8080607@argo.co.il> (raw)
In-Reply-To: <4332697C.7070409@cdac.in>
Karthik Sarangan wrote:
> 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.
make sure your buffer is aligned on a 512 byte boundary.
next prev parent reply other threads:[~2005-09-22 8:35 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-22 8:21 O_DIRECT for block device Karthik Sarangan
2005-09-22 8:34 ` Avi Kivity [this message]
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
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