Re: IDE/ATAPI in 2.5

[Jauder Ho]

And path_to_inst does not always do the RightThing(tm). [1] [2] Two
systems identically configured has the potential of having path_to_inst
look different. Especially if you have previously installed a device or
moved stuff around. And if the expectation is that a group of devices will
come up in a certain sequence (think shared tape devices for instance) and
it changes, it quickly becomes a nightmare. Not a fun proposition by any
means.

--Jauder

[1] eg http://www.myri.com/scs/documentation/mug/installation/solaris.html
[2] http://www.magma.com/support/sun.htm

On Tue, 16 Jul 2002, Joerg Schilling wrote:

> >From [e-mail] Tue Jul 16 13:59:27 2002
>
> >> It would help, if somebody would correct the current SCSI addressng scheme used
> >> in Linux. Linux currently uses something called BUS/channel/target/lun.
> >> This does not reflect reality.
> >>
> >> What Linux calls a SCSI bus is definitely not a SCSI bus but a SCSI HBA card.
> >> What Linux calls a channel really is one of possibly more SCSI busses going
> >> off one of the SCSI HBA cards. It makes sense to just count SCSI busses.
>
> >Well, no. It doesn't. Because the numbers will change if you add a card
> >(even at runtime - hotplugging USB SCSI is something real happening
> >today. And that'd be a very bad thing.
>
> It hey change, then this is a Linux kernel problem. On Solaris they don't
> change because Solaris manages /etc/path_to_inst
>
> Jörg
>
>  EMail:[e-mail] (home) Jörg Schilling D-13353 Berlin
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