Quantum LTO 4, Руководство пользователя

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SCSI Commands: 46BSET CAPACITY Page 208
Field Bytes Bits Description
Capacity
Proportion
Value 3-4 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.
Reserved All reserved bits must be 0.
Control 5 See SCSI Command Control Byte Format on page 25.
The SET CAPACITY command sets the available tape capacity to:
Tape Capacity = Total Tape Capacity
×
Capacity Proportion Value / 65535
3.34.2 SET CAPACITY Completion Status
Code Message Description
00h Good
Status The drive is ready to perform any appropriate command.
The drive remains in any previously set mode.
The tape position is at BOM.
Data on tape is logically inaccessible.
Note: If IMMED is one, then Good Status only indicates that the command is
valid.
02h Check
Condition Use the REQUEST SENSE command to retrieve status information.
Possible Sense Keys are:
Code Message Description
01h Recovered Error Tape capacity is rounded up to 20% of total
capacity.
02h Not Ready No cartridge is in the drive.
04h Hardware Error Drive hardware failure detected.
05h Illegal Request The tape is not at BOM or the Command
Descriptor Block is not valid.
06h Unit Attention The cartridge was changed or the drive was
reset prior to this command.
07h Write Protected The cartridge is write-protected.