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Old 04-13-2004, 10:21 PM   #1
wombatz
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Registered: Sep 2003
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Question mdadm super block - RH9


Hi All,

I'm getting the following when entering

/sbin/mdadm --query /dev/md0

/dev/md0: 7.81GiB raid1 2 devices, 0 spares. Use mdadm --detail for more detail./dev/md0: No md super block found, not an md component

I have had a good look around the net and have come up with 0 on what No md super block found, not an md component is. Do i have a problem or is part of my setup not as it should be.
I'm new to raid. this raid was setup as part on a RH9 install.

Thanks

Wombatz
 
Old 04-14-2004, 12:08 AM   #2
AutOPSY
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have you formatted these drives to use RAID ?

it seems as if it isnt recognizing a correct superblock.
Or it may have been done improperly
 
Old 04-14-2004, 12:45 AM   #3
wombatz
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I ran through the software raid config on install - manually partition with disk druid.

as you can see the df command shows the following

/dev/md0 8064432 4869500 2785284 64% /

and fdisk -l

Disk /dev/hdd: 8622 MB, 8622931968 bytes
255 heads, 63 sectors/track, 1048 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/hdd1 * 1 1020 8193118+ fd Linux raid autodetect
/dev/hdd2 1021 1048 224910 82 Linux swap

Disk /dev/hda: 10.2 GB, 10248118272 bytes
240 heads, 63 sectors/track, 1323 cylinders
Units = cylinders of 15120 * 512 = 7741440 bytes

Device Boot Start End Blocks Id System
/dev/hda1 * 1 1084 8195008+ fd Linux raid autodetect
/dev/hda2 1085 1323 1806840 82 Linux swap

&

/sbin/mdadm -D /dev/md0
/dev/md0:
Version : 00.90.00
Creation Time : Tue Mar 30 01:20:06 2004
Raid Level : raid1
Array Size : 8193024 (7.81 GiB 8.39 GB)
Device Size : 8193024 (7.81 GiB 8.39 GB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 0
Persistence : Superblock is persistent

Update Time : Wed Apr 7 04:45:07 2004
State : dirty, no-errors
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0


Number Major Minor RaidDevice State
0 3 1 0 active sync /dev/hda1
1 22 65 1 active sync /dev/hdd1
UUID : 008acb69:e7c80780:e9525639:924d94c4
Events : 0.17


can i give any more info to help

Wombatz
 
Old 05-04-2004, 08:13 AM   #4
flysideways
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/dev/md0 is not a component, that is correct, it is the array. /dev/hdX1 or /dev/sdX1 are the components, try the command with the components instead of the array.

If you are looking at mdadm --misc --help or any of the other help files it is neccessary to make the distinction between the array and the components for syntax reasons.
 
Old 05-04-2004, 05:20 PM   #5
wombatz
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Thanks flysideways
 
  


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