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is my raid1 array really working??



I've had a system up for a year and a half without
failure.

So, I am starting to wonder if my raid1 array is
really working.

I am using kernel 2.4.27-2-k7.

My partition table (so says webmin) is:

Location 	IDE device A
Cylinders 	4865
Size 	38 GB
Model 	ST340014A
Edit IDE parameters
	
No. 	Type 	Extent 	Start 	End 	Use 	Free
1 	Linux 		1 	34 	/ 	52 %
2 	Extended 		35 	4865 		
5 	Linux 		35 	642 	/usr 	57 %
6 	Linux 		643 	1007 	/var 	38 %
7 	Linux swap 		1008 	1103 	swap 	
8 	Linux 		1104 	1152 	/tmp 	90 %
9 	Linux 		1153 	4865 	/home 	88 %

Location 	IDE device C
Cylinders 	4865
Size 	38 GB
Model 	ST340014A
Edit IDE parameters
	
No. 	Type 	Extent 	Start 	End 	Use 	Free
1 	Linux raid 		1 	34 		
2 	Extended 		35 	4865 		
5 	Linux raid 		35 	642  /dev/md1 	
6 	Linux raid 		643 	1007 /dev/md2 	
7 	Linux raid 		1008 	1103 /dev/md3 	
8 	Linux raid 		1104 	1152 /dev/md4 	
9 	Linux raid 		1153 	4865 /dev/md5

My /etc/mdadm/mdadm.conf file looks like:

DEVICE partitions
ARRAY /dev/md5 level=raid1 num-devices=2
UUID=75c9333b:c99e99dd:9947f426:1f215bd9
   devices=/dev/hda9,/dev/hdc9
ARRAY /dev/md4 level=raid1 num-devices=2
UUID=b0c62ab7:a45e909b:1670ba5d:8ee5c5df
   devices=/dev/hda8,/dev/hdc8
ARRAY /dev/md3 level=raid1 num-devices=2
UUID=0fd97ccf:005a5c2a:6efc6511:5cd76a21
   devices=/dev/hda7,/dev/hdc7
ARRAY /dev/md2 level=raid1 num-devices=2
UUID=14edd478:d0a67bff:730fa08e:85eb3180
   devices=/dev/hda6,/dev/hdc6
ARRAY /dev/md1 level=raid1 num-devices=2
UUID=0b54d4cd:5cb855b5:1254f1d8:e048fe30
   devices=/dev/hda5,/dev/hdc5
ARRAY /dev/md0 level=raid1 num-devices=2
UUID=f8f40e71:86ab52d5:b8931d11:b5e877d8
   devices=/dev/hda1,/dev/hdc1

And a cat /proc/mdstat looks like:

Personalities : [linear] [raid0] [raid1]
read_ahead 1024 sectors
md0 : inactive ide/host0/bus1/target0/lun0/part1[1]
      0 blocks
md1 : active raid1
ide/host0/bus0/target0/lun0/part5[0]
ide/host0/bus1/target0/lun0/part5[1]
      4883648 blocks [2/2] [UU]

md2 : active raid1
ide/host0/bus0/target0/lun0/part6[0]
ide/host0/bus1/target0/lun0/part6[1]
      2931712 blocks [2/2] [UU]

md3 : active raid1
ide/host0/bus0/target0/lun0/part7[0]
ide/host0/bus1/target0/lun0/part7[1]
      771008 blocks [2/2] [UU]

md4 : active raid1
ide/host0/bus0/target0/lun0/part8[0]
ide/host0/bus1/target0/lun0/part8[1]
      393472 blocks [2/2] [UU]

md5 : active raid1
ide/host0/bus0/target0/lun0/part9[0]
ide/host0/bus1/target0/lun0/part9[1]
      29824576 blocks [2/2] [UU]

unused devices: <none>


To me, it looks like HDA and HDC are in good health
and configured properly ... but what do I really know.

Can someone tell me how I can really know if my
configuration is working? Is it REALLY this simple?

Harland



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