The reason Clonezilla does not is because all the device name clonezilla
will look for is /dev/[hs]d[a-z], not /dev/md*
Maybe we will try to support Linux software RAID in the future.
Steven.
albinootje wrote:
> Hi,
>
> According to this :
> http://drbl.sourceforge.net/faq/fine-print.php?path=./2_System/65_Clonezilla_support_RAID.faq
>
> Clonezilla does not support software RAID, but can someone provide some
> more details why not ?
>
> If I look at my software RAID 1 setup, I can still see the separate
> device file descriptors :
>
> # ls -la /dev/sda*
> brw-rw---- 1 root disk 8, 0 2009-08-08 00:54 /dev/sda
> brw-rw---- 1 root disk 8, 1 2009-08-08 00:54 /dev/sda1
> brw-rw---- 1 root disk 8, 2 2009-08-08 00:54 /dev/sda2
> brw-rw---- 1 root disk 8, 3 2009-08-08 00:54 /dev/sda3
> brw-rw---- 1 root disk 8, 4 2009-08-08 00:54 /dev/sda4
>
> # cat /proc/mdstat
> Personalities : [raid1]
> md2 : active raid1 sda4[0] sdb4[1]
> 437506112 blocks [2/2] [UU]
>
> md1 : active raid1 sda3[0] sdb3[1]
> 48829440 blocks [2/2] [UU]
>
> md0 : active raid1 sda1[0] sdb1[1]
> 96256 blocks [2/2] [UU]
>
> unused devices: <none>
>
> What would go wrong if I would use clonezilla to make a clone of one of
> the two disks,
> by pointing it to the /dev/sda (etc.), and restore it on another (new) disk,
> and let the software RAID 1 sync with yet another disk later on ?
>
>
> # time dd if=/dev/sda1 of=sda1-test count=100 bs=16k
> 100+0 records in
> 100+0 records out
> 1638400 bytes (1.6 MB) copied, 6.52774 seconds, 251 kB/s
>
> real 0m6.575s
> user 0m0.000s
> sys 0m0.000s
>
> # time dd if=/dev/md0 of=md0-test count=100 bs=16k
> 100+0 records in
> 100+0 records out
> 1638400 bytes (1.6 MB) copied, 0.0736687 seconds, 22.2 MB/s
>
> real 0m0.316s
> user 0m0.004s
> sys 0m0.008s
>
> # diff md0-test sda1-test
> #
>
> .... no difference between those two test files
>
> TIA,
> A.
>
>
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--
Steven Shiau <steven _at_ nchc org tw> <steven _at_ stevenshiau org>
National Center for High-performance Computing, Taiwan. http://www.nchc.org.tw
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