Retrieving data from a mirrored drive

Hello,
Can anyone advise how to retrieve/access the data on a mirrored drive? Both the primary drive and the mirrored drive do not load onto the desktop, and in Disk Utility only the mirrored drive shows up in the list of drives, unhighlighted. The only option given in Disk Utility is to delete drive, or "other options", which does not really offer any options.
The drives are definitely mirrored. It is a 10 terabyte system, with 5 separate drives mirroring the other 5. The files are not split between the drives. The primary drive not mounting is the one with all the media on it. The media is totally off-line in Final Cut Pro, so the mirrored drive is not automatically backing up the data/media.
How do I access that media on the mirrored drive?
Thanks in advance for any help.

Without actually knowing what the actual arrays are I can't tell you. I'm still not clear whether there are two striped arrays mirroring one another or five separate drives in each enclosure with one drive mirrored to another in the other enclosure or if you have ten drives with ever other pair in a mirrored RAID or something altogether different. I don't even know if these RAIS (whatever they are) were set up using Disk Utility or some other hardware or software.
Let's assume for the sake of argument that there are two boxes - A and B - each with five drives. Box A consists of drives A1, A2, A3, A4, and A5 while Box B has drives B1, B2, B3, B4, and B5. I can conceive of some basic configurations:
1. Drives A1-A5 are configured as a striped RAID and drives B1-B5 as an identical striped RAID. Box A and Box B are configured in a mirrored RAID.
2. Drives A1 and B1, A2 and B2, A3 and B3, A4 and B4, and A5 and B5 are each configured as mirrored RAIS.
3. A1 and A2 are mirrored, A3 and A4 are mirrored, A5 and B1 are mirrored, B2 and B3 and B4 and B5 are each mirrored.
With the first configuration your data will be lost if one drive goes bad in one of the striped arrays, but may be intact on the mirrored array. The RAID software will need to be used to first "break" the mirrored RAID but leave the striped arrays alone.
In the second configuration use the RAID software to "break" the mirrored RAID with the bad drive. The data should be intact on the other drive used in the mirrored array.
In the third setup you would do the same as in the second, but just have different drives involved.

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