Quantum LTO 4, User Manual

Page: 159 / 297

SCSI Commands: 33BRECEIVE DIAGNOSTIC RESULTS Page 151
3.21.4.1 Field Descriptions – PCV not set
Field Bytes Bits Description
Page Code 0 Identifies the type of diagnostic page being returned.
Reserved 1 All reserved bits must be 0.
Page Length 2-3 Indicates the number of bytes of data to be returned after this block.
Transfer
Period Factor 4 Transfer Period Factor is the same as the one found in PPR and SDTR messages.
Reference the SPI specification for further details on how to derive the Transfer
Period from the Transfer Period Factor.
Req/Ack
Offset 6 Req/Ack Offset is the same as the one found in PPR and SDTR messages.
Reference the SPI specification for further details.
Transfer
Width
Exponent 7 Transfer Width Exponent
0 = narrow
1 = wide
PCOMP_EN 8 7 Precompensation enable
RTI 8 6 Retain training information
RD_STRM 8 5 Read streaming and read flow control enable
WR_FLOW 8 4 Write flow control enable
HOLD_MCS 8 3 Hold margin control settings
QAS_REQ 8 2 Always 0, indicating Quick Arbitration and Select is not supported
DT_REQ 8 1 DT clocking enable request.
Set to one when a double transition transfer agreement is in effect.
IU_REQ 8 0 Information units enable request
3.21.5 RECEIVE DIAGNOSTIC RESULTS Completion Status
Status 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 not changed.
02h Check
Condition Use the REQUEST SENSE command to retrieve status information. Possible
Sense Keys are:
Code Message Description
04h Hardware Error Drive hardware failure detected.
05h Illegal Request The CDB contains an invalid bit.
06h Unit Attention The cartridge was changed, or the drive was
reset prior to this command.