HP Surestore 160ex Optical Drive and Library SCSI-2 Command Reference - Page 114
Send Diagnostic Command 1DH,
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SCSI-2 Drive Commands Table 2-68 Table 2-69 SCSI-2 Drive Command Set Send Diagnostic Command (1DH) DevOfl Device Offline bit of 1 must be set for proper operation of any test besides self-test. UnitOfl A Unit Offline bit of 1 must be set for proper operation of any test besides self-test. Parameter List Length Indicates the number of parameter bytes in the Data Out Phase that describe the selected test. This value must be 0 if the SelfTst bit is set to 1. Supported Diagnostic Pages Byte 7 6 5 4 3 2 1 0 0 Page Code (00H) 1 Reserved (0) 2 Page Length (0) (MSByte) 3 Page Length (0) (LSByte) Send Diagnostic Command Page Codes Page Code 00H 81H Parameter Description List Length 4 Supported Diagnostics Pages (See Table 2-68 on page 2-77) 12 Controller Test (See Table 2-70 on page 2-78) Chapter 2 2-77