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Fixed
0
The Transfer Length field specifies the length of the transfer in bytes.
1
The Transfer Length field specifies the length of the transfer in blocks. The size of each
block (in bytes) is determined by the current Block Length given in the Mode Select
Parameter block descriptor.
Transfer Length
0
No data is transferred. The current logical position will be unchanged.
>0 The amount of data to be transferred, in bytes or blocks as determined by the Fixed field.
CDB Fields:
Write Specific Status:
See also the
"Additional Sense Codes" on page 136
hard errors.
An attempt to write to a write-protected cartridge will produce a
with a sense key of
CONDITION
(write-protected).
An attempt to write to a cartridge whose Cartridge Memory has failed will
produce a
CHECK CONDITION
additional sense of 3004h (cannot write medium). If, however, the tape is not
positioned at BOT, the drive will respond with sense data as if the tape is write-
protected. The WP flag in the Mode Parameter Header will also be set.
If EOM (end of medium) is encountered during a write,
status is reported. The EOM flag will be set. The sense key will be set to
with additional sense of 0002h (EOT). Residue
VOLUME OVERFLOW
information will be as below. The logical position will be EOD.
Subsequent Request Sense commands will, however, give tape position as
EOP/M (end of partition/media). It may still be possible to write a smaller
quantity of information at this point (such as filemarks or a smaller block). This
is because logical position after failure to write a block returns to the start of
the unwritten block.
Early Warning EOM information is reported only if a write operation is
successful. This is done by reporting
key of
and additional sense of 0002h (EOT). Residue information is
NO SENSE
valid and indicates zero blocks/bytes.
Residue Information:
Residue information depends on two variables:
Fixed or Variable block mode.
for a variety of possible
and additional sense of 2700h
DATA PROTECT
with a sense key of
MEDIUM ERROR
CHECK CONDITION
CHECK CONDITION
CHECK
and
status with a sense
Commands 155
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