Hi
I have RAID10 with 4 disks. Two of them are connected to 3ware PCIe 4
ports SATA controler and the other two on the motherboard SATA ports. I
wanted to reconnect those two disks connected to motherboard to 3ware card.
So I have turned of the computer, changed the ports, started the
computer and... something went wrong. The system (is located on other
set of disks) started to boot but stopped at some point with
(initramfs) prompt.
So i have changed back the cables to their original position booted once
again and the system booted ok, but that RAID10 raid is no longer visible.
cat /proc/mdstat shows no sing of md4 (that is my RAID10).
bez:~# mdadm --examine /dev/sde1
mdadm: metadata format 00.90 unknown, ignored.
mdadm: metadata format 00.90 unknown, ignored.
mdadm: metadata format 00.90 unknown, ignored.
mdadm: metadata format 00.90 unknown, ignored.
mdadm: metadata format 00.90 unknown, ignored.
/dev/sde1:
Magic : a92b4efc
Version : 00.90.00
UUID : 68ba9941:99b06d2b:a6d85817:73d86525
Creation Time : Mon Aug 22 14:08:36 2011
Raid Level : raid10
Used Dev Size : 976759936 (931.51 GiB 1000.20 GB)
Array Size : 1953519872 (1863.02 GiB 2000.40 GB)
Raid Devices : 4
Total Devices : 4
Preferred Minor : 4
Update Time : Mon Sep 19 14:41:24 2011
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Checksum : 9d49c129 - correct
Events : 10
Layout : near=2, far=1
Chunk Size : 64K
Number Major Minor RaidDevice State
this 2 8 65 2 active sync /dev/sde1
0 0 8 1 0 active sync /dev/sda1
1 1 8 17 1 active sync /dev/sdb1
2 2 8 65 2 active sync /dev/sde1
3 3 8 81 3 active sync /dev/sdf1
Well, it looks OK. So why there is no md4?
bez:~# mdadm --detail --scan
mdadm: metadata format 00.90 unknown, ignored.
mdadm: metadata format 00.90 unknown, ignored.
mdadm: metadata format 00.90 unknown, ignored.
mdadm: metadata format 00.90 unknown, ignored.
mdadm: metadata format 00.90 unknown, ignored.
ARRAY /dev/md1 level=raid1 num-devices=2 metadata=00.90 UUID=8217ec09:15447b4d:65b570e2:d0c384e4
ARRAY /dev/md0 level=raid1 num-devices=2 metadata=00.90 UUID=6cc5fe40:770f86cb:65b570e2:d0c384e4
ARRAY /dev/md2 level=raid1 num-devices=2 metadata=00.90 UUID=925a0a99:c6f209cb:f9cbbe93:e229c843
ARRAY /dev/md3 level=raid1 num-devices=2 metadata=00.90 UUID=f2108b92:c3e6b4ae:f9cbbe93:e229c843
So two questions are important now.
1. How to run this array (safely) again on old ports
2. How to change the ports to new ones? In a proper way.
The other thing bothers me o bit. Why there is
mdadm: metadata format 00.90 unknown, ignored. warnig? AFAIR it was
almost from the beggining of my md arrays on this computer.
bez:~# uname -a
Linux bez 2.6.26-2-686-bigmem #1 SMP Thu Nov 25 01:59:22 UTC 2010 i686 GNU/Linux
Regards
Piotr
--
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
