[dm-devel] What is the deal with the partition separator?
psusi at cfl.rr.com
Wed Feb 16 19:33:31 UTC 2011
On 2/16/2011 12:19 PM, Curtis Gedak wrote:
> Only newer versions of (lib)parted which link with the dmraid library
> work this way with dmraid devices. In this situation it is the dmraid
> library that is coming up with the device names. For all other devices,
> (lib)parted uses the "linux scheme since the dawn of time" mentioned
> below. Older versions of (lib)parted follow the "linux scheme since the
> dawn of time".
(lib)parted does not link to dmraid; it contains its own code to
generate the name by always adding the 'p' in libparted/arch/linux.c.
> GParted uses (lib)parted to come up with device names, except in the
> case of dmraid devices. Because dmraid does not follow the "linux
> scheme since the dawn of time", gparted calls dmraid directly to create
> names following the old dmraid standard (only append partition number to
> device name). If kpartx is available, then GParted will call kpartx to
> ensure that dmraid device names follow the "linux scheme since the dawn
> of time". This behaviour enables GParted to work with all versions of
> dmraid, and maintain compatibility with (lib)parted versions 1.7.1 and
It shouldn't be using both dmraid and kpartx to create the partition
devices. If dmraid does it, then calling kpartx at best does nothing,
and at worst creates duplicate devices.
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