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How to expand MSA30 with 7 146GB disk array to 7 300GB disk array for ESX3.5 on DL380

Posted on 2008-10-21
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I have HP DL380 G5 with internal drives allocated in RAID 1 and RAID 5. I have MSA30 connected with 7 146GB drives. I have 7 300GB drives that I would like to replace the original array with. Other than unplugging drives one at a time, waiting for the RAID to rebuild and repeating, what are other ways of expanding the array to use my 300GB drives? The 2nd channel of the MSA30 is empty, but I only have a single channel card in my DL380.
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Question by:finallydidit99
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paulsolov earned 375 total points
ID: 22773117
Replace each disk one by one until it rebuilds one by one
Extend the array (functonality depends on raid controller)
Once array extends you'll have free space, you can do one of the following:
  1.  Create an additional datastore in the empty space
  2.  Create an extent to extend your current datastore


Before doing anything backup, backup, backup.

The cleanest way to do this is backup up the virtual machines off the ESX Server, wipe clean and delete the currenty array.  Recreate one with the new drives (when you take the old drives out you'll still have the old data just in case)


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by:finallydidit99
ID: 22776106
Is there any other way of doing this? Clearly rebuilding the array with the larger drives would be the fastest, but I was hoping with the 6402 controller card and with the 2nd channel in the MSA30, there would be another option.
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by:paulsolov
ID: 22776395
You can do this but not real time since you don't have shared storage.

Since you're running local storage you will need to cold migrate the virtual machine from one datastore to the other.

You can create another array and datastore with the new drives since the MSA holds 14? drives.  You should be able to do this with your current controller single channel can support this but putting it on the second channel give it a little more throughput.  

How are you doing your backups and redundancy if the host crashes?
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by:finallydidit99
ID: 22776719
Currently no backups. This is a test environment. My server, DL380, only has a single external connection (HP 6402) to the MSA30 even though the MSA30 has 2 channels.

I think I'm going to take your suggestion of ust backing up the data and rebuilding the array with the larger drives. I figured that is what I would have to do, but was hoping for a better solution.

Do you know of a way to use both channels in the MSA30 with only a single connection to the server?
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by:paulsolov
ID: 22777453
You can add a second array to your first channel as well and move the virtual machines via cold migration between the datastores. Normally a second channel goes to a different drive cage or you can split the drive cage to use both channels but I would have to review the hardware.  

If you're looking to move this into production you may want to look at a SAN for shared storage.

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