"Chemolli Francesco (USI)" wrote:
>
> > The argument that "if you use numbering based on where in the
> > SCSI chain
> > the disk is, disks don't pop in and out" is absolute crap.
> > It's not true
> > even for SCSI any more (there are devices that will aquire
> > their location
> > dynamically), and it has never been true anywhere else. Give it up.
>
> We could do something like baptizing disks.. Fix some location
> (i.e. the absolutely last sector of the disk or the partition table or
> whatever) and store there some 32-bit ID
> (could be a random number, a progressive number, whatever).
Partition id's seems more interesting than disk id's - we normally
mount partitions not whole disks.
RAID do this well - the raid autodetect partition stores an ID in the
last block,
the remaining N-1 blocks are available for a fs.
This could be extended to non-raid use - i.e. use the "raid autodetect"
partition type for non-raid as well. The autodetect routine could
then create /dev/partitions/home, /dev/partitions/usr or
/dev/partitions/name_of_my_choice
for autodetect partitions not participating in a RAID.
This is better than volume labels, as it will work for all fs'es
(including those who don't support mount-by-ID) and also raw
partitions with no fs.
Helge Hafting
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