RAID size mismatch

[Ferenc Wagner <wferi@niif.hu>]

Hi,

Sorry for spamming the list so hard...  Now I'm missing something.
I issued the following commands in the Lenny installer:

~ # modprobe raid1
~ # mdadm --create /dev/md0 --auto=yes -l1 -n2 /dev/ram0 /dev/ram1
mdadm: array /dev/md0 started.
~ # cat /proc/mdstat
Personalities : [raid1] 
md0 : active raid1 ram1[1] ram0[0]
      8128 blocks [2/2] [UU]

After this partman presents me with the following menu items:

  6. RAID1 device #0 - 8.3 MB Software RAID device     
  7. >      #1   4.2 MB      

What are those two different sizes?

~ # parted_devices 
/dev/md0	4161536	Unknown
~ # mdadm -D /dev/md0
/dev/md0:
        Version : 00.90.03
  Creation Time : Sun Apr  6 22:41:37 2008
     Raid Level : raid1
     Array Size : 8128 (7.94 MiB 8.32 MB)
  Used Dev Size : 8128 (7.94 MiB 8.32 MB)
   Raid Devices : 2
  Total Devices : 2
Preferred Minor : 0
    Persistence : Superblock is persistent

    Update Time : Sun Apr  6 22:41:40 2008
          State : clean
 Active Devices : 2
Working Devices : 2
 Failed Devices : 0
  Spare Devices : 0

           UUID : 943b966d:1f04bc87:b8bc6804:7db3c3dc
         Events : 0.2

    Number   Major   Minor   RaidDevice State
       0       1        0        0      active sync   /dev/ram0
       1       1        1        1      active sync   /dev/ram1
~ # lsmod
Module                  Size  Used by
raid1                  21984  1 
md_mod                 71316  1 raid1
xfs                   476760  0 

I would be grateful if somebody could provide an explanation.
-- 
Thanks,
Feri.