HP C2246 Technical Reference Manual page 121

B
Vendor Unique Command Descriptions
This section provides descriptions of the Vendor Unique commands supported by the Target.
Table B-1 is a list of the Vendor Unique commands supported by the Target with brief
descriptions included for each command.
Command Descriptions
Detailed descriptions of the Vendor Unique commands supported by the Target are provided
at the end of this chapter. These descriptions include the Control Byte format, Command
Descriptor Block (CDB) formats, data formats, and all device-specific information involved in
command execution.
Table B-1. Vendor Unique Commands
Command Opcode Use Use
Description
(hex)
Before When
Spin up
WP
1
Enabled
Access Log F2
No Yes Used to retrieve information from the Target's maintenance log.
Change SCSI ID
Cl
No Yes Instructs the Target to change to the supplied address.
Execute Data FE No No
Executes special code downloaded via. the WRITE BUFFER
conuna.nd.
Interface Control
EF
No No
Allows the ESDI commands to be sent to the disk drive
processor.
Manage Primary
FD
I No No Used to manage the primary defect list (P list).
Media Test Fl
No No
Used to test the integrity of the disk media.
Read Headers
EE
No Yes
Requests Target to read all the headers on the addressed track
a.nd return the requested number of bytes of header information.
Read Full
FO
No Yes
Requests Target to return the header, data field, and ECC bytes
of one physical sector.
Reformat Track
ED No
No Formats a single track. If HS bit is 0
1
then it uses normal default
header information. If the HS bit is
1
1
the supplied header
infonnation is used for the track logical address and flag bytes.
Write Full FC No No Allows Initiator to write one complete physical sector, including
header, data, and ECC fields.
Vendor Unique Command Descriptions B· 1