HP Q153090901 - Manual (Page 180)

Commands 180
WRITE ATTRIBUTE 8Dh
The WRITE ATTRIBUTE command allows an application client to write attribute values to MAM
(Medium Auxiliary Memory). Application clients should issue READ ATTRIBUTE commands before
using this command to discover what support the device server has for MAM.
Pre-execution checks:
For this command to be executed, there must be a tape in the drive, even if it is only partially
loaded.
Command descriptor block:
CDB fields:
Illegal Field Deferred Error Unit Attention Media Access
7 6 5 4 3 2 1 0
0 Operation Code (8Dh)
1
Reserved (0)
4
5
Volume Number (0)
6 Reserved (0)
7 Partition Number (0)
8
Reserved (0)
9
10 (MSB)
Parameter List Length
13 (LSB)
14 Reserved (0)
15 Control
Volume
Number
The number of the volume within the MAM. The number of volumes of the MAM must be
equal to that of the tape. In the case of Ultrium, the only has a single volume, so this field
is be set to 0.
Partition
Number
The number of the partition within the MAM. The number of partitions of the MAM must
be equal to that of the tape. In the case of Ultrium, the only has a single partition, so this
field is be set to 0.
Parameter List
Length
The length in bytes of the parameter list contained in the Data-Out buffer.
0 The Data-Out buffer is empty. This condition is not be considered an error.
n The length in bytes of the parameter list contained in the Data-Out buffer.