TAPE UNIT PARAMETERS M2488 PRODUCT GUIDE
5-20 CG00000-011503 REV. A April 1997
The product serial number field contains 16 bytes of ASCII data that is vendor-specific. The product
serial number is stored in NVRAM and is maintained across power cycles and resets. If the product
serial number is not available due to a NVRAM error, then ASCII spaces (20h) are returned in this
field.
5-3.4 Implemented Operating Definition Page - Page 81h
VPD page 81h returns the list of implemented operating definitions for the target. The format for
VPD page 81h is:
Table 5-22. INQUIRY Data Format VPD Page 81h - Implemented Operating Definition Page
BITS
BYTES
7 654321 0
0
Peripheral Qualifier Peripheral Device Type =01h
1
Page code = 81h
2
Reserved
3
Page length = 06h
4
Reserved Current operating definition = 03h
5
SavImp = 0b Default operating definition = 03h
6
SavImp = 0b Supported operating definition = 00h
7
SavImp = 0b Supported operating definition = 03h
8
SavImp = 1b Supported operating definition = 40h
9
SavImp = 1b Supported operating definition = 41h
Table 5-23. INQUIRY Data Format VPD Page 81h Field Description
BYTE BIT VALUE DESCRIPTION
4 0-6 03h The current operating definition field indicates the present operating definition.
5-9 7 1
0
For each of the following operating definition fields, there is a corresponding
SavImp (Save Implemented) bit. A SavImp bit set to one indicates that the corre-
sponding operating definition parameter can be saved.
A SavImp bit set to zero indicates that the corresponding operating definition
parameter cannot be saved.
5 0-6 03h The default operating definition field indicates the value of the operating definition
the target uses upon power-up. The current and default operating definitions are
always reported as 03h (SCSI-2 operating definition).
6-9 0-6 Reference the Change Definition SCSI command specification (CDB byte 3) for a
description of the supported operating definitions listed in this page (i.e. 00h, 03h,
40h, and 41h).
