Dell PowerVault TL4000 SCSI Reference Guide - Page 90

Request, Sense

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REQUEST SENSE (03h) The REQUEST SENSE command tells the library to transfer sense data to the initiator. Bit 7 6 5 4 3 2 1 0 Byte 0 Operation Code (03h) 1 LUN Reserved 2 Reserved 3 Reserved 4 Allocation Length 5 Control Field descriptions: Allocation length: This field specifies the maximum sense data length the hosts wants to receive. The sense data is valid for a check condition status returned on the previous command. The sense data bytes are preserved by the library until retrieved by the REQUEST SENSE command from the same initiator. If the media changer receives a REQUEST SENSE command, it returns up to 18 bytes of Sense Data with the appropriate values in the Sense Key, Additional Sense Code, and Additional Sense Code Qualifier. Byte 0 1 2 3 - 6 7 8 - 11 12 13 14 15 16 17 Bit 7 Valid (0) Filemark SKSV (MSB) 6 EOM C/D 5 4 3 2 1 0 Response code (70h) Segment number ILI Reserved Information Additional sense length (0Ah) Reserved Additional sense code Additional sense code qualifier Reserved Reserved BPV Field Pointer Sense Key Bit Pointer (LSB) Field descriptions Valid: A Valid bit of one indicates that the Information field contains valid information as defined in the SCSI specification. This bit is set to 0. 3-76 TL2000 and TL4000 SCSI Reference

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REQUEST
SENSE
(03h)
The
REQUEST
SENSE
command
tells
the
library
to
transfer
sense
data
to
the
initiator.
Bit
7
6
5
4
3
2
1
0
Byte
0
Operation
Code
(03h)
1
LUN
Reserved
2
Reserved
3
Reserved
4
Allocation
Length
5
Control
Field
descriptions:
Allocation
length:
This
field
specifies
the
maximum
sense
data
length
the
hosts
wants
to
receive.
The
sense
data
is
valid
for
a
check
condition
status
returned
on
the
previous
command.
The
sense
data
bytes
are
preserved
by
the
library
until
retrieved
by
the
REQUEST
SENSE
command
from
the
same
initiator.
If
the
media
changer
receives
a
REQUEST
SENSE
command,
it
returns
up
to
18
bytes
of
Sense
Data
with
the
appropriate
values
in
the
Sense
Key,
Additional
Sense
Code,
and
Additional
Sense
Code
Qualifier.
Bit
7
6
5
4
3
2
1
0
Byte
0
Valid
(0)
Response
code
(70h)
1
Segment
number
2
Filemark
EOM
ILI
Reserved
Sense
Key
3
-
6
Information
7
Additional
sense
length
(0Ah)
8
-
11
Reserved
12
Additional
sense
code
13
Additional
sense
code
qualifier
14
Reserved
15
SKSV
C/D
Reserved
BPV
Bit
Pointer
16
(MSB)
Field
Pointer
17
(LSB)
Field
descriptions
Valid:
A
Valid
bit
of
one
indicates
that
the
Information
field
contains
valid
information
as
defined
in
the
SCSI
specification.
This
bit
is
set
to
0.
3-76
TL2000
and
TL4000
SCSI
Reference