Re: SCSI tape access on 2.6 kernels?

Chip Coldwell
2006-01-24T17:52:52Z

On Tue, 24 Jan 2006, Gerhard Schneider wrote:

>
> It's getting me mad..
>
> It seems that with 2.6 (compared to 2.4) there has something been
> changed in the kernel that I'm not aware of so I'm not able to
> write/read tapes efficiently anymore..

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.

Chip

--
Charles M. "Chip" Coldwell
"Turn on, log in, tune out"