Resize / file system and create /home in existing raid 1

["Tiago Pinheiro" <tpinheiro@xxxxxxxxx>]

Hi!

I'm running Ubuntu 7.10 x64. Currently, my system is setup as follows:

- / is in a Raid 1 array (/dev/md0) consisting of two partitions -
sda1 and sdb1 (ca. 148 GB);

- swap in Raid 0 (/dev/md1) - sda2 and sdb2 of ca. 1 GB each giving me
2 GB in total:

- sda and sdb are two disks of 160GB:

- I do not have a separate /home file system.

I would like to correct this situation by doing the following:

- resize the partition containing the / file system to 27 GB keeping
it in RAID 1 (/dev/md0);
- create a new partition of 120GB to mount /home, also in RAID 1 (/dev/md2);
- change swap from a RAID 0 to a RAID 1, resizing it to 2GB (/dev/md1).

Can this be done without reinstalling everything from scratch?

Output of /proc/mdstat:

Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5]
[raid4] [raid10]
md1 : active raid0 sda2[0] sdb2[1]
         2023936 blocks 64k chunks

md0 : active raid1 sda1[0] sdb1[1]
         155276160 blocks [2/2] [UU]

unused devices: <none>
/proc/mdstat


Output of /etc/fstab:

# /etc/fstab: static file system information.
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
proc            /proc           proc    defaults        0       0
# /dev/md0
UUID=b3dd64e4-786f-496b-b9e3-c42da731e113 /               ext3
defaults,errors=remount-ro 0       1
# /dev/md1
UUID=d9f45f6b-025f-42e7-9ebf-27cddc6fa27b none            swap    sw
           0       0
/dev/scd0       /media/cdrom0   udf,iso9660 user,noauto,exec 0       0
/dev/fd0        /media/floppy0  auto    rw,user,noauto,exec 0       0

Output of mdadm --detail /dev/md0:

/dev/md0:
        Version : 00.90.03
  Creation Time : Mon Feb 25 13:25:15 2008
     Raid Level : raid1
     Array Size : 155276160 (148.08 GiB 159.00 GB)
  Used Dev Size : 155276160 (148.08 GiB 159.00 GB)
   Raid Devices : 2
  Total Devices : 2
Preferred Minor : 0
    Persistence : Superblock is persistent

    Update Time : Mon May  5 18:14:31 2008
          State : clean
 Active Devices : 2
Working Devices : 2
 Failed Devices : 0
  Spare Devices : 0

           UUID : c39b647f:cb4f0780:05770ebd:8c404dcc
         Events : 0.18

    Number   Major   Minor   RaidDevice State
       0       8      145        0      active sync   /dev/sda1
       1       8      161        1      active sync   /dev/sdb1

Output of mdadm --detail /dev/md1:

/dev/md1:
        Version : 00.90.03
  Creation Time : Mon Feb 25 13:25:23 2008
     Raid Level : raid0
     Array Size : 2023936 (1976.83 MiB 2072.51 MB)
   Raid Devices : 2
  Total Devices : 2
Preferred Minor : 1
    Persistence : Superblock is persistent

    Update Time : Mon May  5 01:17:47 2008
          State : clean
 Active Devices : 2
Working Devices : 2
 Failed Devices : 0
  Spare Devices : 0

     Chunk Size : 64K

           UUID : cd9a2299:6e3e0036:8ebd1878:1deccd4a
         Events : 0.7

    Number   Major   Minor   RaidDevice State
       0       8      146        0      active sync   /dev/sda2
       1       8      162        1      active sync   /dev/sdb2


I would really appreciate your help. If you need further info from me
please just say so and I will try to post it as soon as possible.

Thanks.

Cheers,
Tiago
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