On Wednesday 18 October 2006 00:19, Forrest Taylor wrote:

On Tue, 2006-10-17 at 22:21 +0200, Bruno Costacurta wrote:

quoted

Hello,

I built my first RAID with 2 disks.

Array looks active (please see hereafter) but I'm confusing about size :
having 2 disks of 160-Gb each I expect a size of 160-Gb (correct ?) but
array size seems around 103-Gb.

Your array is not 103-Gb, but 103-Mb.

quoted

Disk /dev/md0: 106 MB, 106823680 bytes
2 heads, 4 sectors/track, 26080 cylinders
Units = cylinders of 8 * 512 = 4096 bytes

'mdadm --detail /dev/md0'  :
-start-
/dev/md0:
        Version : 00.90.03
  Creation Time : Tue Oct 17 21:26:43 2006
     Raid Level : raid1
     Array Size : 104320 (101.89 MiB 106.82 MB)
    Device Size : 104320 (101.89 MiB 106.82 MB)

What did you do to create the device?  Did you change the disks
recently, or add new disks?

You could try to grow the RAID (mdadm -G /dev/md0 -z max), but I would
be wary of doing that until I knew why the disks showed the small size.

Forrest

Hello,
looks better now...
It seems my previous fdisk commands to set type 'Linux raid autodetect' were 
incorrect because not completely removed previous partitions.
Size looks correct.
...
mdadm --misc --detail /dev/md0
/dev/md0:
        Version : 00.90.03
  Creation Time : Tue Oct 17 23:24:25 2006
     Raid Level : raid1
     Array Size : 154304192 (147.16 GiB 158.01 GB)
    Device Size : 154304192 (147.16 GiB 158.01 GB)
   Raid Devices : 2
  Total Devices : 2
Preferred Minor : 0
    Persistence : Superblock is persistent

    Update Time : Wed Oct 18 06:20:20 2006
          State : clean
 Active Devices : 2
Working Devices : 2
 Failed Devices : 0
  Spare Devices : 0

           UUID : c27fb118:876d28b2:47dd7e83:d14c4332
         Events : 0.12

    Number   Major   Minor   RaidDevice State
       0       8       17        0      active sync   /dev/sdb1
       1       8       33        1      active sync   /dev/sdc1
...

Bye,
Bruno