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
Spinup
Wpl
Enabled
Access Log
F2
No
Yes Used
to
retrieve information
from
the
Target's
maintenance
log.
Change
SCSI ID
C1
No Yes
Instructs
the
Target
to
change
to
the
supplied address.
Execute
Data
FE
No No Executes special code downloaded via
the
WRITE
BUFFER
conunand.
Interface
Control
EF
No
No
Allows
the
ESDI
conunands
to
be
sent
to
the
disk drive
processor.
Manage
Primary
FD
No
No Used
to
manag~
the-primary defect list
(P
list).
Media Test F1 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
and
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.
1£.
HS
bit
is 0, .then
it
uses
normal
default
header
information.
If
the
HS
bit
is 1,
the
supplied
header
information is used for
the
track
logical address
and
flail:
bytes.
Write Full
FC
No
No Allows
Initiator
to
write
one
complete physical sector, including
header,
data,
and
ECC fields.
DRAFT
Vendor
Unique
Command
Descriptions
B-1
1/18/93 09:58
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