Table 211 Set Capacity Command Descriptor Block - Field Descriptions - Quantum LTO 2 User Manual

Table 211 SET CAPACITY
Command Descriptor Block —
Field Descriptions
LTO-2 SCSI Interface Guide
Field Bytes
Operation 0
Code
Ignored 1
Logical
Unit
Immed 1
Capacity 3-4
Proportion
Value
Reserved
Control 5
The command sets the available tape capacity to:
SET CAPACITY
Tape Capacity = Total Tape Capacity ¥ Capacity Proportion Value / 65535
Bits Description
The Operation Code for
is 0Bh.
5-7 The LUN field is vestigial from the
SCSI-1 standard and is ignored.
0 0 = Status is not returned until the
operation is complete
1 = Status is returned as soon as the
operation is initiated.
This field specifies the portion of the
total tape capacity to be made available
for use. The Capacity Proportion Value
is the numerator of a fraction with a
denominator of 65535. The resulting
available tape capacity is equal to the
total tape capacity multiplied by this
fraction. The drive rounds up the
capacity to the next higher supported
value.
All reserved bits must be 0.
See Control Byte Format on page
Chapter 2 SCSI Commands
SET CAPACITY Command
SET CAPACITY
29.
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