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Old 09-21-2014, 05:57 AM   #1
asimk1903
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Registered: Sep 2014
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Degraded Array


Hi

I am very new to linux. I recently go a HP Proliant N54L and installed Openmediavault on it. I have got two segate hard drives and have set them up as raid 1. Since setting up raid 1 have been getting following notifications

This is an automatically generated mail message from mdadm
running on FINGROWSERVER

A DegradedArray event had been detected on md device /dev/md126.

Faithfully yours, etc.

P.S. The /proc/mdstat file currently contains the following:

Personalities : [raid1]
md126 : active (auto-read-only) raid1 sdc[1]
2930265424 blocks super 1.2 [2/1] [_U]

md127 : active raid1 sdb[0]
2930265424 blocks super 1.2 [2/1] [U_]

unused devices: <none>

I dont beleive that there is any problem with the disk as these are new. Can someone please help. Really appreciate some help with this.

Regards

asim1903
 
Old 09-21-2014, 08:22 AM   #2
Ser Olmy
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Registered: Jan 2012
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As /proc/mdstat clearly shows, the md driver seems to think that you now have two RAID 1 arrays, /dev/md127 and /dev/md126, each with one working and one failed drive.

I assume both drives are supposed to belong to the same array? In that case, delete /dev/md126, erase the metadata from /dev/sdc1, and add it back to /dev/md127.
 
Old 09-21-2014, 08:26 AM   #3
asimk1903
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Registered: Sep 2014
Posts: 4

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Hi Ser Olmy

Thanks a lot for your reply. I am really not sure how do I do this. Can you please provide some instructions on how to achieve this.

Really appreciate your help.

Regards

Asim

---------- Post added 09-21-14 at 10:27 PM ----------

Hi Ser Olmy

Thanks a lot for your reply. I am really not sure how do I do this. Can you please provide some instructions on how to achieve this.

Really appreciate your help.

Regards

Asim
 
Old 09-21-2014, 08:53 AM   #4
Ser Olmy
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I'm not familiar with OpenMediaVault, but I would expect it to have a GUI where you can do stuff like deleting arrays and adding spare drives to existing arrays.

How did you configure the RAID 1 array in the first place?
 
Old 09-21-2014, 09:28 AM   #5
asimk1903
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Registered: Sep 2014
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Hi

Unfortunately with the GUI, I am unable to delete the raid. Will need to use command line to fix this. Is it possible to do this from command line.

Regards

Asim
 
Old 09-21-2014, 10:30 AM   #6
Ser Olmy
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Assuming /dev/md126 is the array you want to delete, this command will stop the array and release /dev/sdc:
Code:
mdadm --misc --stop /dev/md126
To make sure the md driver doesn't recreate the unwanted array, delete the superblock on /dev/sdc with:
Code:
mdadm --misc --zero-superblock /dev/sdc
Depending on how the distribution is configured, you may have to run these commands via sudo.

You should then be able to add /dev/sdc to the remaining array from the GUI.
 
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Old 09-22-2014, 09:04 AM   #7
asimk1903
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Registered: Sep 2014
Posts: 4

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Hi Ser Olmy


Thanks a lot for your help. That solved the problem.

Regards

Asim
 
  


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