On Sat, 27 Dec 1997, Stephen Harris wrote:
> This isn't a killer, more a cosmetic problem, but it might have long term
> problems.
>
> Setup: 2.0.33 with SCSI compiled as a module. Internal 2Gb disk, external
> Yamaha CDR100 writer. AHA2940 card. kerneld. RedHat 4.0 system otherwise.
>
> Under normal circumstances, the CDR is turned off, so at boot time, so scsi0
> is detected with sda quite happily and the partition mounted. Occaisionally
> I turn on the external box, so
> umount /partition
> rmmod sd_mod
> rmmod aic7xxx
> mount /partition
>
You don't have to do it like that, there is a file under /proc/scsi that
you can identify a device to, and have it found. Ok, after reading the
source, I found the right thing:). From line ~2300 of drivers/scsi/scsi.c
(grep is your friend;), one of the many things you can echo into
/proc/scsi/scsi is this:
/*
* Usage: echo "scsi add-single-device 0 1 2 3" >/proc/scsi/scsi
* with "0 1 2 3" replaced by your "Host Channel Id Lun".
* Consider this feature BETA.
* CAUTION: This is not for hotplugging your peripherals. As
* SCSI was not designed for this you could damage your
* hardware !
* However perhaps it is legal to switch on an
* already connected device. It is perhaps not
* guaranteed this device doesn't corrupt an ongoing data transfer.
*/
I suppose you could umount the disk first to make sure the bus is quiet :)
[snip snip]
Bryn
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