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Chapter 4 SCSI Commands
READ ATTRIBUTE Command (8Ch)
DLT-S4 Interface Reference Guide
247
REMAINING CAPACITY IN PARTITION
and
MAXIMUM CAPACITY IN
PARTITION:
These are native capacities, assuming no data compression
for the specified medium partition, expressed in increments of 1,048,576
bytes; that is, a value of 1 means 1,048,576 bytes, 2 means 2,097,152 bytes,
and so on.
TAPE ALERT FLAGS:
Provides a means of reporting the state of the Tape
Alert flags for the previous load of the medium. Each Tape Alert flag
occupies 1 bit (Flag 1 = MSB, byte 1; Flag 64 = LSB, byte 8). The bits
specify all the Tape Alert flags set during the previous load — the bits are
“sticky” for the load.
LOAD COUNT:
Indicates how many times this medium has been fully
loaded. The drive does not reset this attribute.
MAM SPACE REMAINING:
Indicates the space currently free in the
medium auxiliary memory. The total medium auxiliary memory capacity
is reported in the MAM CAPACITY attribute (see
MAM CAPACITY
:
on
page 256).
You cannot always use all of the free space in a particular medium
auxiliary memory implementation. Depending on the internal
organization of the memory and the software that controls it,
fragmentation issues may mean that certain attribute sizes might not be
fully accommodated as the medium auxiliary memory nears its
maximum capacity.
FORMATTED DENSITY CODE:
If the drive formats the medium using a
format other than the one specified in the
MEDIUM DENSITY CODE
attribute (for example, for compatibility with a previous generation
format), the
FORMATTED DENSITY CODE
specifies the
DENSITY CODE
of
the format chosen. Otherwise, this attribute is the same as the
MEDIUM
DENSITY CODE
.
0224h -
033Fh
Reserved
0340h
MEDIUM USAGE HISTORY
90
BINARY
page 248
0341h
PARTITION USAGE HISTORY
60
BINARY
page 251
0342h -
03FFh
Reserved
Attribute
Identifier
Name
Attribute
Length
Format
Refer to