sg_vpd
(1m)
名前
sg_vpd - fetches Vital Product Data (VPD) pages using a SCSI
INQUIRY command
形式
sg_vpd [--enumerate] [--help] [--hex] [--ident] [--long]
[--maxlen=LEN] [--page=PG] [--quiet] [--raw] [--verbose]
[--version] DEVICE
説明
SG3_UTILS SG_VPD(8)
NAME
sg_vpd - fetches Vital Product Data (VPD) pages using a SCSI
INQUIRY command
SYNOPSIS
sg_vpd [--enumerate] [--help] [--hex] [--ident] [--long]
[--maxlen=LEN] [--page=PG] [--quiet] [--raw] [--verbose]
[--version] DEVICE
DESCRIPTION
This utility fetches a Vital Product Data page and decodes
it or outputs it in ASCII hexadecimal or binary. VPD pages
are fetched with a SCSI INQUIRY command.
Probably the most important page is the Device Identifica-
tion VPD page (page number: 0x83). Since SPC-3, support for
this page has been flagged as mandatory. This page can be
fetched by using the --ident option.
When no options are given, other than a DEVICE, then the
"Supported VPD pages" (0x0) VPD page is fetched and decoded.
OPTIONS
Arguments to long options are mandatory for short options as
well. The options are arranged in alphabetical order based
on the long option name.
-e, --enumerate
list the names of the known VPD pages, first the stan-
dard pages, then the vendor specific pages. Each group
is sorted in abbreviation order. The DEVICE and other
options are ignored and this utility exits after list-
ing the VPD page names.
-h, --help
outputs the usage message summarizing command line
options then exits. Ignores DEVICE if given.
-H, --hex
outputs the requested VPD page in ASCII hexadecimal.
Can be used multiple times, see section on the ATA
information vpd page.
-i, --ident
decode the device identification (0x83) VPD page. When
used once this option has the same effect as
'--page=di'. When use twice then the short form of the
device identification VPD page's logical unit designa-
tor is decoded. In the latter case this option has the
same effect as '--quiet --page=di_lu'.
-l, --long
sg3_utils-1.33 Last change: October 2011 1
SG3_UTILS SG_VPD(8)
when decoding some VPD pages, give a little more out-
put. For example the ATA Information VPD page only
shows the signature (in hex) and the IDENTIFY (PACKET)
DEVICE (in hex) when this option is given.
-m, --maxlen=LEN
where LEN is the (maximum) response length in bytes. It
is placed in the cdb's "allocation length" field. If
not given (or LEN is zero) then 252 is used (apart from
the ATA Information VPD page which defaults to 572)
and, if the response indicates this value is insuffi-
cient, another INQUIRY command is sent with a larger
value in the cdb's "allocation length" field. If this
option is given and LEN is greater than 0 then only one
INQUIRY command is sent. Since many simple devices
implement the INQUIRY command badly (and do not support
VPD pages) then the safest value to use for LEN is 36.
See the sg_inq man page for the more information.
-p, --page=PG
where PG is the VPD page to be decoded or output. The
PG argument can either be an abbreviation, a number or
a pair or numbers separated by a comma. The VPD page
abbreviations can be seen by using the --enumerate
option. If a number is given it is assumed to be deci-
mal unless it has a hexadecimal indicator which is
either a leading '0x' or a trailing 'h'. If one number
is given then it is assumed to be a VPD page number. If
two numbers are given the second number indicates which
vendor specific VPD page to decode when several pages
share the same VPD page number. If this option is not
given (nor '-i', '-l' nor '-V') then the "Supported VPD
pages" (0x0) VPD page is fetched and decoded. If PG is
'-1' or 'sinq' then the standard INQUIRY response is
output.
-q, --quiet
suppress the amount of decoding output.
-r, --raw
output requested VPD page in binary. The output should
be piped to a file or another utility when this option
is used. The binary is sent to stdout, and errors are
sent to stderr.
-v, --verbose
increases the level or verbosity.
-V, --version
print out version string then exit.
sg3_utils-1.33 Last change: October 2011 2
SG3_UTILS SG_VPD(8)
ATA INFORMATION VPD PAGE
This VPD page (0x89 or 'ai') is defined by the SCSI to ATA
Translation standard. It contains information about the SAT
layer, the "signature" of the ATA device and the response to
the ATA IDENTIFY (PACKET) DEVICE command. The latter part
has 512 bytes of identity, capability and settings data
which the hdparm utility is capable of decoding (so this
utility doesn't decode it).
To unclutter the output for this page, the signature and the
IDENTIFY (PACKET) DEVICE response are not output unless the
--long option (or --hex or --raw) are given. When the --long
option is given the IDENTIFY (PACKET) DEVICE response is
output as 256 (16 bit) words as is the fashion for ATA
devices. To see that response as a string of bytes use the
'-HH' option. To format the output suitable for hdparm to
decode use either the '-HHH' or '-rr' option. For example if
'dev/sdb' is a SATA disk behind a SAT layer then this com-
mand: 'sg_vpd -p ai -HHH /dev/sdb | hdparm --Istdin' should
decode the ATA IDENTIFY (PACKET) DEVICE response.
ATTRIBUTES
See attributes(5) for descriptions of the following
attributes:
+---------------+--------------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+--------------------------+
|Availability | system/storage/sg3_utils |
+---------------+--------------------------+
|Stability | Uncommitted |
+---------------+--------------------------+
NOTES
Since some VPD pages (e.g. the Extended INQUIRY page) depend
on settings in the standard INQUIRY response, then the stan-
dard INQUIRY response is output as a pseudo VPD page when PG
is set to '-1' or 'sinq'. Also the decoding of some fields
(e.g. the Extended INQUIRY page's SPT field) is expanded
when the '--long' option is given using the standard INQUIRY
response information (e.g. the PDT and the PROTECT fields).
In the 2.4 series of Linux kernels the DEVICE must be a SCSI
generic (sg) device. In the 2.6 series block devices (e.g.
disks and ATAPI DVDs) can also be specified. For example
"sg_inq /dev/sda" will work in the 2.6 series kernels. From
lk 2.6.6 other SCSI "char" device names may be used as well
(e.g. "/dev/st0m").
EXIT STATUS
The exit status of sg_vpd is 0 when it is successful. Other-
wise see the sg3_utils(8) man page.
sg3_utils-1.33 Last change: October 2011 3
SG3_UTILS SG_VPD(8)
EXAMPLES
The examples in this page use Linux device names. For suit-
able device names in other supported Operating Systems see
the sg3_utils(8) man page.
To see the VPD pages that a device supports, use with no
options. The command line invocation is shown first followed
by a typical response:
# sg_vpd /dev/sdb
Supported VPD pages VPD page:
Supported VPD pages [sv]
Unit serial number [sn]
Device identification [di]
Extended inquiry data [ei]
Block limits (SBC) [bl]
To see the VPD page numbers associated with each supported
page then add the '--long' option to the above command line.
To view a VPD page either its number or abbreviation can be
given to the '--page=' option. The page name abbreviations
are shown within square brackets above. In the next example
the Extended inquiry data VPD page is listed:
# sg_vpd --page=ei /dev/sdb
extended INQUIRY data VPD page:
ACTIVATE_MICROCODE=0 SPT=0 GRD_CHK=0 APP_CHK=0 REF_CHK=0
UASK_SUP=0 GROUP_SUP=0 PRIOR_SUP=0 HEADSUP=1 ORDSUP=1
SIMPSUP=1
WU_SUP=0 CRD_SUP=0 NV_SUP=0 V_SUP=0
P_I_I_SUP=0 LUICLR=0 R_SUP=0 CBCS=0
Multi I_T nexus microcode download=0
Extended self-test completion minutes=0
POA_SUP=0 HRA_SUP=0 VSA_SUP=0
Further examples can be found on the
http://sg.danny.cz/sg/sg3_utils.html web page.
AUTHOR
Written by Doug Gilbert
REPORTING BUGS
Report bugs to <dgilbert at interlog dot com>.
COPYRIGHT
Copyright (C) 2006-2011 Douglas Gilbert
This software is distributed under a FreeBSD license. There
is NO warranty; not even for MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE.
SEE ALSO
sg_inq(sg3_utils), sg3_utils(sg3_utils), sdparm(sdparm),
sg3_utils-1.33 Last change: October 2011 4
SG3_UTILS SG_VPD(8)
hdparm(hdparm)
This software was built from source available at
https://java.net/projects/solaris-userland. The original
community source was downloaded from
http://sg.danny.cz/sg/p/sg3_utils-1.33.tgz
Further information about this software can be found on the
open source community website at
http://sg.danny.cz/sg/sg3_utils.html.
sg3_utils-1.33 Last change: October 2011 5