Hello!
I do not know if I may receive any support about mdadm through this e-mail address. If not, please, could you forward this message to the appropriate box if one exists.
I am currently trying to migrate a Linux partition (Mandrake 10) to RAID 1. To this purpose I have installed mdadm V1.8.1. The first attempt was to configure an equally-sized partition of my second disk (/dev/hdb) as part of a degraded RAID 1 device. Unfortunately, starting the array fails. The following shows pieces of information that should help understanding the case:
The command I use is:
mdadm -C /dev/md0 --metadata=1 --level=raid1 --raid-devices=2 missing /dev/hdb5 -v
To which mdadm answers: mdadm: /dev/hdb5 appears to contain an ext2fs file system size=4843912K mtime=Thu Dec 2 17:11:54 2004 mdadm: /dev/hdb5 appears to be part of a raid array: level=1 devices=2 ctime=Sat Dec 4 18:28:46 2004 mdadm: size set to 4843904K Continue creating array? y VERS = 9000 mdadm: ADD_NEW_DISK for /dev/hdb5 failed: Invalid argument
Running cat /proc/mdstat, it appears that the array has not been started, despite it (and the corresponding superblock) seems having been created:
/dev/hdb5:
Magic : a92b4efc
Version : 01.00
Array UUID : 67458b6bc6:237b3269:983c6473:483366
Name :
Creation Time : Sat Dec 4 18:45:49 2004
Raid Level : raid1
Raid Devices : 2
Device Size : 9687808 (4.62 GiB 4.96 GB)
Super Offset : 9687808 sectors
Device UUID : 67458b6bc6:237b3269:983c6473:483366
Update Time : Sat Dec 4 18:45:49 2004
Checksum : b1fb29ae - correct
Events : 1
Array State : _U 383 spares
Checking the log files, here is what I found: Dec 4 18:45:49 localhost kernel: md: invalid raid superblock magic on hdb5 Dec 4 18:45:49 localhost kernel: md: hdb5 has invalid sb, not importing! Dec 4 18:45:49 localhost kernel: md: md_import_device returned -22
So I tried to start the array by means of the -A switch together with an /etc/mdadm.conf file I filled in manually:
mdadm -A -s /dev/md0 -v
Here is the result: mdadm: looking for devices for /dev/md0 Segmentation fault
A look at the log files gives: Dec 4 19:01:41 localhost kernel: md: md0 stopped.
This log appears very strange to me since the array was not running ;-)
I have not succeeded in finding some directions to understand the problem. I hope someone could help me.
Best regards.
Jean-Yves MERTES - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
