Hm. I got this output when I ran your code on the OP's data (c&p'd from the console window):
c:\test>junk4
hdisk0 0009E05B
hdisk1 P1/Z1-Ab 16 Bit LVD SCSI Disk Drive (18200 MB)
Manufacturer................IBM
Machine Type and Model......ST318305LC
FRU Number..................09P4437
Serial Number...............0004A0D2
Part Number.................09P4436
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