Emulex MD21/S2, Technical Manual

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Online Diagnostic Commands
6.4 ONLINE DIAGNOSTIC COMMANDS
The MD21 Controller supports a set of online diagnostic
subcommands, which are used to further delineate peripheral or MD21
Controller failures. These diagnostic subcommands are specified by
the SEND DIAGNOSTIC command and executed by the RECEIVE DIAGNOSTIC
command. The diagnostic subcommands are listed in Table 6-3 and
described in the SEND DIAGNOSTIC COMMAND section of the Emulex SCSI
Disk Controller Programming Reference Manual, manual number
MD2352501.
Table 6-4. MD21 Controller Diagnostic Subcommands
Diagnostic Subcommand Description
GET DRIVE STATUS
Causes the MD21 Controller to
return unmodified status from the
disk drive. |
PASS DRIVE COMMAND Causes the MD21 Controller to pass
disk drive commands from the
Initiator to the disk drive.
READ DISK PARTITIONS
Causes MD21 Controller to transfer
the physical addresses related to
the logical partitions on the
specified disk drive to the
Initiator.
READ HEADER
Causes the MD21 Controller to
perform a read operation of the
header address field for each
block of a track.
Controller Initialization and Self-Test Procedures 6-9