Fatal error in disk

I have a doubt with an error message, and i want to be sure if this is a normal situation or not.

Situation: I was formating and installing a SCSI 36Gb HD with UNIX SCO 5.05, the problem happens when is making the division and filesystem on disk 1, and the message error is "Exit value 139 Status Value -29952"
"Fatal error in diskinfo.c line 3525"
"Function DIAdJust Division: Cannot adjust division to fit in the usable space: Disk0"

[IGNORE] [RETURN TO IQM]

My questions are: What is the recomended size of the divisions that i have to make?, The problem is the size of the HardDisk? or Maybe this HardDisk is not supported by UNIX SCO 5.05

example: this are the divisions that i made
DISK 1
boot -- 50 mb
swap -- 1Gb
root -- 1Gb
/u -- 22Gb
/u2 -- 10Gb

DISK 2
/a -- 20Gb
/a2 -- 14Gb

The error mesage appears in both disks

Any comment about this problem it�s gonna be very useful for us,
thanks.

Found your error in the following link on SCO. You will have to read the whole thing to get some clue on what to do since it starts off with a different problem which is related)