Mode Sense (6)
102 SL150 Interface Reference Manual Julyl 2017
Allocation Length The allocation length field specifies the maximum number of bytes that the
initiator has allocated for data returned from the Mode Sense command. The
library transfers either the number of bytes specified by the allocation lengh
field or all of the available mode sense data, whichever is less.
A value of 00h indicated that no mode sense data is to be transferred. This
condition is not considered an error.
The allocation length depends on the mode page and the bridged tape
drive.
The maximum number of bytes returned by the library is 68h (104d) bytes.
HP Bridged Tape Drive:
04h = Mode Sense Parameter Header Length
10h = Disconnect Reconnect Page Length
08h = Logical Unit Page Length
08h = Fibre Channel Port Control Page Length
10h = SAS Port Control Page Length
64h = SAS Phy Control and Discover Mode Subpage Length
0Ch = Informational Exceptions Tape Alert Mode Page Length
14h = Element Address Assignment Page Length
04h = Transport Geometry Page Length
14h = Device Capabilities Page Length
IBM Bridged Tape Drive:
04h = Mode Sense Parameter Header Length
0Ch = Informational Exceptions Tape Alert Mode Page Length
14h = Element Address Assignment Page Length
04h = Transport Geometry Page Length
14h = Device Capabilities Page Length
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