Dell PowerVault TL4000 SCSI Reference Guide - Page 44

Sub Number, bytes, Description - mechanical block error

Get Dell PowerVault TL4000 PDF manuals and user guides View all Dell PowerVault TL4000 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 44 highlights

MODE SENSE 6 (1Ah) The MODE SENSE (6) command provides a means for a device server to report parameters to an application client. It is a complementary command to the MODE SELECT (6) command. Bit Byte 0 1 2 3 4 5 7 6 LUN PC 5 4 3 2 1 0 Operation Code (1Ah) Reserved DBD Page Code Subpage Code Allocation length Control Reserved Field descriptions: DBD: The Disable Block Descriptors bit specifies if the media changer may return block descriptor after the Parameter List Header. The media changer does not support block descriptors, therefore this bit is ignored. PC: The Page Control field defines the type of mode parameter values to be returned in the mode pages. 00b Report Current Values (equal to default values if no pages previously saved) 01b Report changeable values 10b Report Default Values 11b Report Saved Values (equal to default values if no pages previously saved) Page Code: The page code defines which pages should be returned. See next table. A Initiator can request one or all mode sense pages. Each response includes a four bytes for the Parameter List Header, followed by the specified number of bytes for each page: Page Code Subpage Code 00h 00 0Ah 01h 1Ch 00h 1Dh 00h 1Eh 00h 1Fh 00h 20h 00h Number bytes 4 Page Name Parity Page 32 Control Extension Page 12 Tape Alert Page 20 Element Address Assignment Page 4 Transport Geometry Page 20 Device Capabilities Page 8 Event Filter Page (Vendor Specific) Page Description Provides a means to read out the setting for maximum number retries on parity errors. Provides a means to read out the capabilities of the SET TIMESTAMP and REPORT TIMESTAMP commands. Allows the host to see what mechanism is used to report Tape Alert events. Provides a means to read the SCSI element address assignments and respective element ranges. Provides a means to read the specifics about the Medium Transport Element. Provides a means to read the library's capabilities. Provides a means to read out the current selected event filter settings. 3-30 TL2000 and TL4000 SCSI Reference

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
MODE
SENSE
6
(1Ah)
The
MODE
SENSE
(6)
command
provides
a
means
for
a
device
server
to
report
parameters
to
an
application
client.
It
is
a
complementary
command
to
the
MODE
SELECT
(6)
command.
Bit
7
6
5
4
3
2
1
0
Byte
0
Operation
Code
(1Ah)
1
LUN
Reserved
DBD
Reserved
2
PC
Page
Code
3
Subpage
Code
4
Allocation
length
5
Control
Field
descriptions:
DBD:
The
Disable
Block
Descriptors
bit
specifies
if
the
media
changer
may
return
block
descriptor
after
the
Parameter
List
Header.
The
media
changer
does
not
support
block
descriptors,
therefore
this
bit
is
ignored.
PC:
The
Page
Control
field
defines
the
type
of
mode
parameter
values
to
be
returned
in
the
mode
pages.
00b
Report
Current
Values
(equal
to
default
values
if
no
pages
previously
saved)
01b
Report
changeable
values
10b
Report
Default
Values
11b
Report
Saved
Values
(equal
to
default
values
if
no
pages
previously
saved)
Page
Code:
The
page
code
defines
which
pages
should
be
returned.
See
next
table.
A
Initiator
can
request
one
or
all
mode
sense
pages.
Each
response
includes
a
four
bytes
for
the
Parameter
List
Header,
followed
by
the
specified
number
of
bytes
for
each
page:
Page
Code
Subpage
Code
Number
bytes
Page
Name
Page
Description
00h
00
4
Parity
Page
Provides
a
means
to
read
out
the
setting
for
maximum
number
retries
on
parity
errors.
0Ah
01h
32
Control
Extension
Page
Provides
a
means
to
read
out
the
capabilities
of
the
SET
TIMESTAMP
and
REPORT
TIMESTAMP
commands.
1Ch
00h
12
Tape
Alert
Page
Allows
the
host
to
see
what
mechanism
is
used
to
report
Tape
Alert
events.
1Dh
00h
20
Element
Address
Assignment
Page
Provides
a
means
to
read
the
SCSI
element
address
assignments
and
respective
element
ranges.
1Eh
00h
4
Transport
Geometry
Page
Provides
a
means
to
read
the
specifics
about
the
Medium
Transport
Element.
1Fh
00h
20
Device
Capabilities
Page
Provides
a
means
to
read
the
library's
capabilities.
20h
00h
8
Event
Filter
Page
(Vendor
Specific)
Provides
a
means
to
read
out
the
current
selected
event
filter
settings.
3-30
TL2000
and
TL4000
SCSI
Reference