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PS Parameters Savable. For MODE SELECT, this bit must be 0.
Additional Page
Length This field indicates the number bytes in the page. However, the value does
not include bytes 0 and 1. The length is returned in MODE SENSE
commands and must subsequently be set to the same value when
performing MODE SELECT. If the page length does not match that expected
by the drive, a CHECK CONDITION status is returned, sense key set to
ILLEGAL REQUEST.
The drive returns a CHECK CONDITION status with sense key set to
ILLEGAL REQUEST if it receives an unsupported Page Code or a Page field
with values not supported or changeable. In such cases, no parameters are
changed as a result of the command.
Buffer Full Ratio Not supported. Any value is ignored.
Buffer Empty Ratio Not supported. Any value is ignored.
Bus Inactivity Limit Not supported. Any value is ignored.
Disconnect Time
Limit Not supported. Any value is ignored.
Connect Time Limit Not supported. Any value is ignored.
Maximum Burst Size This value specifies the maximum amount of data that will be transferred
without disconnecting. A value of 0 sets no limit. Any value is in units of 512
bytes. For example, a value of 8 represents 4 Kbytes. Values that are not
multiples of 8 are rounded up to the closest multiple of 8.
DTDC Data Transfer Disconnect Control. This field defines further restrictions for
when disconnect is permitted.
00b Data transfer disconnect control is not used. Disconnect is
controlled by the other fields in this page.
01b Once the data transfer of a command has been started a target
does not attempt to disconnect until all the data to be transferred
has been transferred.
10b Reserved.
11b Once the data transfer of a command has started, a target does
not attempt to disconnect until the command is complete.
If DTDC is a non-zero value and the maximum burst size is non-zero, the
tape drive returns CHECK CONDITION status, sense key set to ILLEGAL
REQUEST and additional sense code set to ILLEGAL FIELD IN
PARAMETER LIST.
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