Cannot Allocate Unallocated space!

I have a W2000 server w/ 203GB of unallocated space.  The hardware is 4 72.4GB SCSI drives that are striped w/ raid 5.  When I right click 'create partition' is greyed out.

In disk manager the icon has a red circle w/ slash.  Status is 'online' and type is 'unknown.'

I have two other partitions that lie on 2 34 GB drives labeled C and E both being primary.
ikeeponAsked:
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shankshankCommented:
You will probably need to right click, and initialize, or format the disk, before you can actually assign it a drive letter and use it

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ikeeponAuthor Commented:
Ther is no initialize when right clicking it.
shankshankCommented:
Format?
ikeeponAuthor Commented:
I had to right click the disk icon and hit something that said 'write disk.'
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