Fujitsu M2488, Руководство по эксплуатации продукта

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TAPE UNIT PARAMETERS M2488 PRODUCT GUIDE
5-22 CG00000-011503 REV. A April 1997
5-3.6 Unit Usage Page - Page C0h
VPD page C0h returns usage parameters. The format for VPD page C0h is:
The following fields defined for this page are stored in NVRAM and are maintained across power
cycles and resets. If any of these fields cannot be read from NVRAM due to a NVRAM error, then
the SCSI command requesting access to these fields is terminated with CHECK CONDITION status,
the sense key is set to HARDWARE ERROR, and the ASC/ASCQ is set to Internal Target Failure.
Table 5-26. INQUIRY Data Format VPD Page C0h - Unit Usage Page
BITS
BYTES 7 6 5 4 3 2 1 0
0 Peripheral Qualifier Peripheral Device Type =01h
1 Page code = C0h
2 Reserved
3 Page length = 18h
4-11 Tape motion time
12-19 Power-on time
20-27 Cleaning count
Table 5-27. INQUIRY Data Format VPD Page C0h Field Description
BYTE BIT VALUE DESCRIPTION
4-11 The tape motion time field contains 8 bytes of ASCII data that is vendor-specific.
The tape motion time is in units of seconds and is incremented based on the speed
of tape motion. For example:
This time is not incremented when there is no tape motion.
This time is incremented at a faster rate during a rewind and at a slower rate during
a read operation.
The tape motion time (TMT) value can be used to calculate the total meters of tape
that passed over the head, based on the speed of the MTU, using the following equa-
tion:
# of meters = (TMT seconds) * (2 meters/second)
12-19 The power-on time field contains 8 bytes of ASCII data that is vendor-specific. The
power-on time indicates the total number of minutes the unit has been powered-on.
20-27 The cleaning count field contains 8 bytes of ASCII data that is vendor-specific. The
cleaning count value is in units of tape sectors processed and is used to determine
when MTU head cleaning is required. After a cleaning operation is performed, the
cleaning count value is automatically set to 0.