Well, onstat -d will tell you what raw or cooked devices or files
Informix is using, how much of the partition or file it is configured to
use and beginning at what offset within the device or file.  If these
are RAW devices, you then have to use whatever tool was used to create
the device partitions to query the underlying structures from which they
were made.  We do NOT know whether these devices are partitions from
singleton drives partitioned with fdisk or something like that or if
they are stripes made from multiple drives, or partitions taken from a
larger RAID structure using some vendor specific partitioning tool.  Ask
your System Administrator we are not mind readers and we don't have
access to your systems.

Art S. Kagel
Oninit