Re: SCSI tape access on 2.6 kernels?

Chip Coldwell
2006-01-24T20:36:29Z

On Tue, 24 Jan 2006, Patrick Mansfield wrote:

> On Tue, Jan 24, 2006 at 12:52:36PM -0500, Chip Coldwell wrote:
>
>> Put
>>
>> options st try_direct_io=0
>
>>
>> in /etc/modprobe.conf. Direct I/O defeats read-ahead, and
>> significantly (factor of >5) degrates read performance. I don't know
>> about writes.
>
> For tape???

Yes, for tape. We verified this with a DAT72 DDS drive.

Chip

--
Charles M. "Chip" Coldwell
Senior Software Engineer
Red Hat, Inc