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Broken raid

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http://www.unix.com – Hello, I have 2 servers with broken raid 1, but each one gives me a different error, I dont know what is the difference. Code: [root@ ~]# cat /proc/mdstat Personalities : [raid1] [raid0] [raid6] [raid5] [raid4] [raid10] md0 : active raid1 sdb1[2](F) sda1[0]       2102464 blocks [2/1] [U_] md1 : active raid1 sdb2[2](F) sda2[0]       264960 blocks [2/1] [U_] md2 : active raid1 sdb3[2](F) sda3[0]       730202368 blocks [2/1] [U_] unused devices: <none> Code: [root@ ~]# cat /proc/mdstat Personalities : [raid1] [raid0] [raid6] [raid (HowTos)

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Submitted by jiqi2 on 08/25/2012

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Iotop tool reports md2_raid1 takes HDD IO up to 99 %. The server's HDD becomes busy and it's impossible to do any operation on it.

Here is the output of cat /proc/mdstat Personalities : [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md2 : active raid1 sda3[0] sdb3[1] 1462766336 blocks [2/2] [UU]

md1 : active raid1 sda2[0] sdb2[1] 264960 blocks [2/2] [UU]

md0 : active raid1 sda1[

I found out that the raid 1 was degraded:

Code: [rootnode /]# cat /proc/mdstat Personalities : [raid1] md3 : active raid1 sda5[0] sdb5[1] 1822445428 blocks super 1.0 [2/2] [UU]   md2 : active raid1 sda3[0](F) sdb3[1] 1073741688 blocks super 1.0 [2/1] [_U]   md1 : active raid1 sda2[0] sdb2[1] 524276 blocks super 1.0 [2/2] [UU]   md0 : active raid1 sda1[0] sdb1[1]

I'm having a problem with one of my hard drives as I have been receiving this email for the past few days.

Code: "A DegradedArray event had been detected on md device /dev/md127." I decided to Google further and looked into the contents of my mdstat file, this is the output:

Code: Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md1

I'm using Ubuntu Server 11.10 and the hard drives in my (md) raid-5 array are constantly working (I can hear them crunching) when I mount them. Soon after I unmount them, they stop.

mdadm grow issue 3 years 25 weeks ago

I'm using Intrepid and mdadm 2.6.7.

I had a clean stable raid5 array, 5x1tb, before I started. I decided to add another 1tb drive to the array because space was getting low.

I connected the new drive and issued the following commands:

Code: sudo mdadm --add /dev/md0 /dev/sdg

I have 6x WD Caviar Black 1,5 TB in Software RAID 10 / 1 / 0 (Centos 6.2 / mdadm)

cat /proc/mdstat Personalities : [raid10] [raid0] [raid1] md0 : active raid1 sdf2[5] sda2[0] sdb2[1] sdd2[3] sdc2[2] sde2[4] 1023988 blocks super 1.0 [6/6] [UUUUUU]

md126 : active raid0 sde1[4] sda1[0] sdd1[3] sdb1[1] sdc1[2] sdf1[5] 122873856 blocks super 1.2 64k chunks

md127 : active raid10 sde3[4] s

So, one of my servers has a hard disk failure.

Hi

No longer able to access my raid, not sure what caused this, but im not able to start it either, help!

mdadm -E /dev/md0 mdadm: no md superblock detected on /dev/md0

mdadm -D /dev/md0 mdadm: md device /dev/md0 does not appear to be active

cat /proc/mdstat shows Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]

md0: inactive sdb1[2](S) sdc1[1](S)

I have an issue with a new mdadm raid.

When i try to:

root@dys:~# mdadm --add --verbose /dev/md0 /dev/sdb1 mdadm: Cannot open /dev/sdb1: Device or resource busy

dmraid i pointed as the usual problem but it's not even installed.

Also tried to check it with lsof and no result.

Im just out of ideeas

the output of /proc/mdstat if of any help:

root@dys:~# cat /proc/mdstat Personalities : [raid1