MCS-7835, How I can add 2nd HDD into RAID1?

Answered Question
Feb 6th, 2007

I have two HDDs with RAID1 in 7835 MCS box and want to scratch re-install the Unity system on 1st HDD with taking out the 2nd to roll-back in case.

The Unity system only recognize single HDD after scratch install on 1st. How I can configure RAID1 again to add the 2nd into the mirroring set?

Thanks in advance,

I have this problem too.
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Correct Answer by Ginger Dillon about 9 years 7 months ago

Hi -

Take a look at this post (note it's for HP server). If you are using an IBM server you will need different procedures. http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=1048925. Go to the second to last entry, which contains the instructions:

ACU allows you to migrate RAID for SCSI disk. All you need to do as below:

1. Original Array A with 36GB RAID 0.

2. Slot in the new disk.

3. In ACU highlight the Array A and choose Expand Array and add the new disk.

4. After expand the array, you should able to change your current RAID to 1+0.

Make sure the new disk size id equal or greater than old disk.

There is also the HP reference manual posted - http://h20000.www2.hp.com/bc/docs/support/SupportManual/c00294139/c00294139.pdf

I've not attempted this myself with a running production system. I would recommend checking with TAC to see if this change is supported with a running Unity. Also I'd create a Unity DiRT Backup just in case.

Hope this helps! Ginger

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Correct Answer
Ginger Dillon Tue, 02/06/2007 - 10:50

Hi -

Take a look at this post (note it's for HP server). If you are using an IBM server you will need different procedures. http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=1048925. Go to the second to last entry, which contains the instructions:

ACU allows you to migrate RAID for SCSI disk. All you need to do as below:

1. Original Array A with 36GB RAID 0.

2. Slot in the new disk.

3. In ACU highlight the Array A and choose Expand Array and add the new disk.

4. After expand the array, you should able to change your current RAID to 1+0.

Make sure the new disk size id equal or greater than old disk.

There is also the HP reference manual posted - http://h20000.www2.hp.com/bc/docs/support/SupportManual/c00294139/c00294139.pdf

I've not attempted this myself with a running production system. I would recommend checking with TAC to see if this change is supported with a running Unity. Also I'd create a Unity DiRT Backup just in case.

Hope this helps! Ginger

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