What is the deal with the partition separator?
psusi at cfl.rr.com
Wed Feb 16 03:21:34 UTC 2011
It used to be that partitions device names just had a digit added on to
the base disk device name. It seems that this became problematic at
some point with device mapper and oddly named disks, and there have been
several responses to it:
1) dmraid and (lib)parted now always add a 'p' between the base name
and the partition number
2) kpartx from multipath-tools adds the 'p' only if the base name ends
in a digit
3) Debian and Ubuntu's udev and init scripts tell kpartx to use 'part'
instead of just 'p'.
4) gparted now explicitly tells dmraid to not use any character so that
it behaves like older versions and is therefore compatible with the
kpartx method that gparted has adopted, at least when the base name does
not end with a digit.
Each of these components needs to agree on what the correct name is or
chaos ensues. I would like to discuss the merits of each and try to
decide on a standard.
Having thought about it for a moment, it seems to me that deciding on
always adding the 'p' is the way to go, since the 'art' just makes
things longer for no good reason, and if you only sometimes add the 'p'
then you can't tell if a device name that ends in a digit that does not
follow a 'p' is a whole disk, or a partition.
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