RAID 1 / Partition won't sync?

georgee · 10-23-2004, 06:26 AM

Hi,
i'm not a linux-pro, so I'll need some help on this one.

I installed Fedora Core 2 with 2 Drives (160GB IDE), and during installation I Created a RAID Level 1, so that if one drive fails, the other will boot and contain all data.

Now the problem is, after unplugging the primary master, the secondary didn't boot. Nothing happened. When I looked at mdstat, it shows me that md0 is not synced.

Code:

 [root@localhost root]# cat /proc/mdstat
Personalities : [raid1] 
md1 : active raid1 hda2[0] hdc2[1]
      1052160 blocks [2/2] [UU]
      
md2 : active raid1 hdc3[1]
      154713856 blocks [2/1] [_U]
      
md0 : active raid1 hdc1[1]
      521984 blocks [2/1] [_U]

MDADM tells me the same:

Code:

 [root@localhost root]# mdadm --detail /dev/md0
/dev/md0:
        Version : 00.90.01
  Creation Time : Fri Oct 15 22:03:33 2004
     Raid Level : raid1
     Array Size : 521984 (509.75 MiB 534.51 MB)
    Device Size : 521984 (509.75 MiB 534.51 MB)
   Raid Devices : 2
  Total Devices : 1
Preferred Minor : 0
    Persistence : Superblock is persistent
 
    Update Time : Sat Oct 23 11:05:55 2004
          State : clean, no-errors
 Active Devices : 1
Working Devices : 1
 Failed Devices : 0
  Spare Devices : 0
 
 
    Number   Major   Minor   RaidDevice State
       0       0        0       -1      removed
       1      22        1        1      active sync   /dev/hdc1
           UUID : f92b0458:fd8f264f:fa615ecf:a59d9ea4
         Events : 0.182

I don't have a clue why it sais that the RaidDevidce is removed, since it isn't.
md2 works perfectly:

Code:

[root@localhost root]# mdadm --detail /dev/md1
/dev/md1:
        Version : 00.90.01
  Creation Time : Fri Oct 15 22:00:12 2004
     Raid Level : raid1
     Array Size : 1052160 (1027.50 MiB 1077.41 MB)
    Device Size : 1052160 (1027.50 MiB 1077.41 MB)
   Raid Devices : 2
  Total Devices : 2
Preferred Minor : 1
    Persistence : Superblock is persistent
 
    Update Time : Fri Oct 15 22:00:12 2004
          State : clean, no-errors
 Active Devices : 2
Working Devices : 2
 Failed Devices : 0
  Spare Devices : 0
 
 
    Number   Major   Minor   RaidDevice State
       0       3        2        0      active sync   /dev/hda2
       1      22        2        1      active sync   /dev/hdc2

I don't have any Idea what causes md0 not to sync. Any Ideas are welcome!

thanks,
mat