On Thu, 2006-11-16 at 14:17 +0000, Andy Green wrote:
> James Pifer wrote:
>
> >>> mdadm --create --verbose /dev/md0 --level=5 --raid-devices=3 /dev/hdb /dev/hdc dev/hdd
>
> I don't suppose it's possible your cwd was / at that time? Just
> wondering why mdadm didn't complain.
>
> -Andy
>
Looking back through the history it's the only time I ran it. I guess at
this point it's a hard lesson learned...
The worst thing is that I thought everything was good because I was
reading and writing to the array yesterday. So because I needed the
space on the other machine the copy of the data was using, I removed it
late last night.
Wish I kept it til I had a better understanding of RAID and the
commands, such as looking at /proc/mdstat. I apparently had a false
sense of security not realizing I screwed up the setup of the raid
array.
Is any of this helpful?
[root@storage ~]# mdadm --query /dev/hdb
/dev/hdb: is not an md array
/dev/hdb: device 0 in 3 device undetected raid5 /dev/md0. Use mdadm --examine for more detail.
[root@storage ~]# mdadm --query /dev/hdc
/dev/hdc: is not an md array
/dev/hdc: device 1 in 3 device undetected raid5 /dev/md0. Use mdadm --examine for more detail.
[root@storage ~]# mdadm --query /dev/hdd
/dev/hdd: is not an md array
/dev/hdd: device 3 in 3 device undetected raid5 /dev/md0. Use mdadm --examine for more detail.
[root@storage ~]# mdadm --query --examine /dev/hdb
/dev/hdb:
Magic : a92b4efc
Version : 00.90.00
UUID : 44cfc75c:25ae3e32:0fbb5311:50edfa8a
Creation Time : Wed Nov 15 09:42:22 2006
Raid Level : raid5
Device Size : 156290816 (149.05 GiB 160.04 GB)
Array Size : 312581632 (298.10 GiB 320.08 GB)
Raid Devices : 3
Total Devices : 3
Preferred Minor : 0
Update Time : Thu Nov 16 02:49:29 2006
State : active
Active Devices : 3
Working Devices : 3
Failed Devices : 1
Spare Devices : 0
Checksum : 85c9306 - correct
Events : 0.57595
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 0 3 64 0 active sync /dev/hdb
0 0 3 64 0 active sync /dev/hdb
1 1 22 0 1 active sync /dev/hdc
2 2 0 0 2 faulty removed
Is there anyway to force it to try and reload the array even with the
failed device? I'm not getting drive errors on the device any longer. Is
the failed device the "dev/hdd" where I missed the leading "/"? Or, is
the failed device /dev/hdb?
What else can I look at? What other commands should I run?
Can I force it to rebuid md0 with hdb and hdc? Right now I get:
[root@storage ~]# mdadm -v --run --force /dev/md0
mdadm: failed to run array /dev/md0: Invalid argument
Right now it looks like md0 does not exist.
James
(sorry for the top post earlier...)
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