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Reconfigure concatenated virtual disk to RAID 1

Posted on 2007-11-21
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Last Modified: 2013-11-14
Our client has a Poweredge 1650 with a Perc 3/Di controller in it.  It's got two 36gb drives in a RAID 1 mirror.  There are two containers, a 4gb container and a 30gb container.  Drive 1 was removed and replaced with a 70gb drive, which started to sync and failed.  We went back to the original 36gb drive and managed to get the system running again.  The problem is that the 4gb container resynced just fine to the old disk, but the 30gb container shows concatenated in the array manager.  I've attempted to reconfigure the virtual disk to a RAID 1 mirror, but it errors out with error number 2.  On the physical disk tab it shows that all 36gb is assigned on Drive 0, but only 4 gb is assigned on Drive 1 (due to the concatenation).  How can I get my 30gb container back into a mirror?

P.S.  Running the latest firmware and drivers available from Dell.
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Question by:kharoldsen
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lnkevin earned 500 total points
ID: 20360623
You don't have the option to restore RAID 1 with concatenated disk. The only option so far is backing up the image with Acronis, Backup Exec Recovery Console and configure RAID 1 with the bigger disk then restore the image. You may need to repair the OS with option F5 to install RAID controller driver. Here is the original message from Dell about your case:

Concatenation (Spanned Volume)
In Array Manager, concatenation refers to storing data on either one array disk or on disk space that spans multiple array disks. When spanning more than one disk, concatenation enables the operating system to view multiple array disks as a single disk.
Data stored on a single disk can be considered a simple volume. This disk could also be defined as a virtual disk that comprises only a single array disk. Data that spans more than one array disk can be considered a spanned volume. Multiple concatenated disks can also be defined as a virtual disk that comprises more than one array disk.
In Array Manager, a dynamic volume that spans to separate areas of the same disk is also considered concatenated.
When an array disk in a concatenated or spanned volume fails, the entire volume becomes unavailable. Because the data is not redundant, it cannot be restored by rebuilding from a mirrored disk or parity information. Restoring from a backup is the only option.

http://support2.jp.dell.com/docs/SOFTWARE/smarrman/marb33/html/ch3_stor.htm

K

Because concatenated volumes do not use disk space to maintain redundant data, they are more cost-efficient than volumes that use mirrors or parity information. A concatenated volume may be a good choice for data that is temporary, easily reproduced, or that does not justify the cost of data redundancy. In addition, a concatenated volume can easily be expanded by adding an additional array disk.

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by:kharoldsen
ID: 31410393
Thank you!
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