Hi,
I'm running 6 x 250GB SATA disks on 2 x Promise SATA150TX4 controllers.
I've partitioned all disks identically with two partitions, one of 1.5GB and the other with the rest of the space.
I've created 3 x 1.5GB RAID1 mirrors from the 6 x 1.5GB paritions. I've installed Fedora Core 2 onto md0, and used md2 and md3 as swap.
I'm now attempting to create a large RAID5 array from the 6 x "big" partitions.
I'm using the command:
# mdadm -v --create /dev/md5 --chunk=128 --level=raid5 --raid-devices=6 --spare-devices=0 /dev/sda2 /dev/sdb2 /dev/sdc2 /dev/sdd2 /dev/sde2 /dev/sdf2
When I look at the array to see what's happening, this is what I see:
# mdadm --detail /dev/md5
/dev/md5:
Version : 00.90.01
Creation Time : Sun Jul 4 20:48:07 2004
Raid Level : raid5
Array Size : 1218208000 (1161.77 GiB 1247.44 GB)
Device Size : 243641600 (232.35 GiB 249.49 GB)
Raid Devices : 6
Total Devices : 6
Preferred Minor : 5
Persistence : Superblock is persistent
Update Time : Sun Jul 4 20:48:07 2004
State : clean, no-errors
Active Devices : 5
Working Devices : 6
Failed Devices : 0
Spare Devices : 1
Layout : left-symmetric
Chunk Size : 128K
Rebuild Status : 2% complete
Number Major Minor RaidDevice State
0 8 2 0 active sync /dev/sda2
1 8 18 1 active sync /dev/sdb2
2 8 34 2 active sync /dev/sdc2
3 8 50 3 active sync /dev/sdd2
4 8 66 4 active sync /dev/sde2
5 0 0 -1 removed
6 8 82 5 spare /dev/sdf2
UUID : 2950b4e7:893db3f0:090135ec:f9ca1574
Events : 0.177301
Why do I appear to have 7 devices? Why is device number 6 marked as spare? Is this normal while the array is being built? Do I just need to leave it working away until it finishes, or is something wrong?
Thanks,
R.
--
http://robinbowes.com
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