Bug#498838: Please set link priority to 100 for dmraid devmapper devices

Giuseppe Iuculano giuseppe at iuculano.it
Sat Sep 13 18:36:24 UTC 2008


unblock 497110 by 498838
thanks

Hi,

Bastian Blank ha scritto:
> Please explain. I'm currently not able to oversee the consequences.
> 
> Bastian
> 

# blkid
/dev/mapper/sil_aiahbgbgaaaj5: TYPE="swap"
/dev/mapper/sil_aiahbgbgaaaj1: UUID="4f4ac281-bb5d-4c34-9437-65df0c203bbb"
TYPE="ext3"
/dev/hda1: UUID="4f4ac281-bb5d-4c34-9437-65df0c203bbb" TYPE="ext3"
/dev/hda5: TYPE="swap"
/dev/hdb1: UUID="4f4ac281-bb5d-4c34-9437-65df0c203bbb" TYPE="ext3"
/dev/hdb5: TYPE="swap"


hda1 and hdb1 share uuid with /dev/mapper/sil_aiahbgbgaaaj1 , so it is not
possible to use UUID in /etc/fstab because it is not unique

# ls -la /dev/disk/by-id/*DMRAID*
lrwxrwxrwx 1 root root 10 13 set 19:45
/dev/disk/by-id/dm-uuid-DMRAID-sil_aiahbgbgaaaj -> ../../dm-0
lrwxrwxrwx 1 root root 10 13 set 19:45
/dev/disk/by-id/dm-uuid-DMRAID-sil_aiahbgbgaaaj1 -> ../../dm-1
lrwxrwxrwx 1 root root 10 13 set 19:45
/dev/disk/by-id/dm-uuid-DMRAID-sil_aiahbgbgaaaj5 -> ../../dm-2


The patch increases link priority for devmapper devices that have an UUID
starting with DMRAID-.

In effect this is not a problem in d-i, so unblocking #497110


Giuseppe

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