Re: Changeover of SCSI buses
On Sat, Jan 18, 2003 at 01:40:23PM +0000, Phil Reynolds wrote:
> I have been using Debian for some time now, and over that time have acquired
> several new items of hardware.
>
> I have a CD writer, which is IDE, and therefore needs SCSI emulation. This
> was always device 0,1,0 when specifed to cdrecord. I also have a digital
> camera, which is USB mass storage.
>
> I know cdrecord at least should be able to cope with me specifying /dev/sg1
> so I may well try that. It seems that, at some time recently, the two buses
> have swapped over, so the USB is now 0, and the IDE 1, so the CD writer is
> now 1,1,0. The camera still mounts, as it is referred to as /dev/sda1.
>
> Why might these buses have swapped over? If I can refer to the CD writer as
> /dev/sg1 in cdrecord, this won't matter, but I consider this a strange thing
> to happen anyway.
It may be to do with which device is readable at bootup; I've had two
ide-scsi CD drives, and if only one had a CD in it, that one would be
assigned ID 0, and the unreadable one ID 1.
It may also be to do with the order in which the relevant kernel
modules are loaded.
Pigeon
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