Linux-kernel mailing list archive 2000-04,: Re: SCSI Tape problems with 2.2.14 and on

# Re: SCSI Tape problems with 2.2.14 and on

Marc SCHAEFER (schaefer@alphanet.ch)
27 Jan 2000 20:00:03 +0100

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Kay Diederichs <Kay.Diederichs@uni-konstanz.de> wrote:
> I find that the st module unloads itself after some time (a few hours?)

A few minutes, when not used, through kmod (2.2.x) or kerneld (2.0.x).

> the SCSI module and the reloading st (which loads the SCSI module)
> brings the tape back to life.

Presumably the tape needs a SCSI reset for some reason (can be because
of a Linux bug).

> I'd say that the st module should not be allowed to unload (but don't
> know how that can be achieved).

Do one of:
- force the st module to be loaded at boot time
On Debian: echo st >> /etc/modules
Or add in rc.local or similar: /sbin/insmod st
[this will additionnally fix the `not enough buffers' BUG which can
happen if the st module is loaded and unloaded repetitively and
memory is very fragmented, leading to performance problems]

- compile the st module in the kernel, not as modules.

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