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ATAPI Interface Chapter 5
Seagate Travan 40 Product Manual Page 61
MODE SENSE (Group 0, Op. Code 1A)
The MODE SENSE command provides the Host with information pertaining to the configuration of the drive. The drive
does not disconnect from the Initiator while executing this command.
CDB for MODE SENSE Command
Data Bits
Byte 7 6 5 4 3 2 1 0 Hex
0 0 0 0 1 1 0 1 0 1A
1 0 0 0 0 DBD 0 0 0 0X
2 PC Page Code XX
3 0 0 0 0 0 0 0 0 00
4 Allocation Length XX
5 0 0 0 0 0 0 0 00
DBD—Disable Block Descriptor: A DBD bit of 0 will enable transfer of the block
descriptor. A DBD bit of 1 will disable transfer of block descriptor parameters.
PC—Page Control: PC field as described below defines the type of values to be
returned for Parameter Page.
Bit 7 Bit 6 Type of Parameter Values to be Returned
0 0 Current Values
0 1 Changeable Values
2
1 0 Default Values
2
1 1 Saved Values
1,2
Note: 1) This is not supported by the drive. If PC=11b, the command will result in
an Illegal Request (Sense Key 5).
2) With the ATAPI interface drive, PC must equal 00b. Other values will
return an Illegal Request (Sense Key 5)
Page Code: The Page Code field specifies which Parameter Page(s) is (are) to be
returned. Any Page Code value other than listed below will result in an Illegal
Request.
Page Code Description
01h Error Recovery and Reporting Parameter Page will Be Returned
02h Disconnect / Reconnect Control Parameter Page Will Be Returned
10h Device Configuration Parameter Page Will Be Returned
11h Media Partition Page Will Be Returned
1C TapeAlert Diagnostics Page Will Be Returned