FAI partitioning.

Ralph Crongeyer ralph at crongeyer.com
Tue Jan 16 21:41:03 CET 2007

Thanks for the help on this everyone.
I have another question about SW RAID and FAI.
I found this online 

Is this the current way to set this up?

I think I need to do this in "/srv/fai/config/disk_config/FAIBASE":

disk_config sda
primary  swap           2000    rw ; raid(1,md0)
primary  /boot          500     rw ; -c -j ext3 raid(1,md1)
primary  /              5000    rw,errors=remount-ro ; -c -j ext3 raid
logical  /var/log       10000   rw ; -c -j ext3 raid(1,md3)
logical  /var/log/apache 0-      rw ; -c -j ext3 raid(1,md4)

disk_config sdb
primary  -          2000                ; raid(1,md0)
primary  -          500                 ; raid(1,md1)
primary  -          5000                ; raid(1,md2)
logical  -          10000               ; raid(1,md3)
logical  -          0-                  ; raid(1,md4)

to get this result:

config# cat /proc/mdstat
Personalities : [raid1]
md4 : active raid1 sda6[0] sdb6[1]
      55512512 blocks [2/2] [UU]

md3 : active raid1 sda5[0] sdb5[1]
      9767424 blocks [2/2] [UU]

md2 : active raid1 sda3[0] sdb3[1]
      4883648 blocks [2/2] [UU]

md1 : active raid1 sda2[0] sdb2[1]
      489856 blocks [2/2] [UU]

md0 : active raid1 sda1[0] sdb1[1]
      1951744 blocks [2/2] [UU]

Is this correct?



Ralph Crongeyer <ralph at crongeyer.com> wrote: 
>Thanks for the info, I'll give it a try.
>As far as the software RAID setup goes, I don't know?
>This is the first time I've set up a SW Raid. However doing it this way if
>one set gets out of sync only that set needs to resync vs the entire disk.
>Does anyone else have any advice on this?
>Henning Sprang <henning_sprang at gmx.de> wrote: 
>>On 1/16/07, Ralph Crongeyer <ralph at crongeyer.com> wrote:
>>> [...]
>>> I want to have the last logical partition use the remaining disk space,
>>> this correct just 0- ?
>>Looks good, I am not sure if zero values work well, if not you might
>>do something like 10-
>>Do you see an error when you try this? Which one?
>>And, maybe a bit OT, and maybe I have just no enoughj knowledge about
>>SW RAID, but when doing RAID, isn't it better to take the full disks
>>and make the sw raid on them, then partition above the md devices
>>instead of paritioning the raw device, and doing sw raid for single
>>paritions (as it looks what you want to do here)?

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