doc/sg_sat_identify.8 - platform/external/sg3_utils - Git at Google

 .TH SG_SAT_IDENTIFY "8" "May 2007" "sg3_utils\-1.24" SG3_UTILS
 .SH NAME
 sg_sat_identify \- sends a ATA IDENTIFY (PACKET) DEVICE command via a
 SCSI to ATA Translation (SAT) layer
 .SH SYNOPSIS
 .B sg_sat_identify
 [\fI\-\-chk_cond\fR] [\fI\-\-help\fR] [\fI\-\-hex\fR] [\fI\-\-len=\fR12|16]
 [\fI\-\-packet\fR] [\fI\-\-raw\fR] [\fI\-\-verbose\fR] [\fI\-\-version\fR]
 \fIDEVICE\fR
 .SH DESCRIPTION
 .\" Add any additional description here
 .PP
 This utility sends either an ATA IDENTIFY DEVICE command or an ATA IDENTIFY
 PACKET DEVICE command to \fIDEVICE\fR and outputs the response. The devices
 that respond to these commands are ATA disks and ATAPI devices respectively.
 Rather than send these commands directly to the device they are sent via a
 SCSI transport which is assumed to contain a SCSI to ATA Translation (SAT)
 Layer (SATL). The SAT standard (SAT ANSI INCITS 431\-2007, prior draft:
 sat\-r09.pdf at www.t10.org) defines two SCSI "ATA PASS\-THROUGH" commands:
 one using a 16 byte "cdb" and the other with a 12 byte cdb. This utility
 defaults to using the 16 byte cdb variant.
 .PP
 The SATL may be in an operating system driver, in host bus adapter firmware
 or in some external enclosure.
 .SH OPTIONS
 Arguments to long options are mandatory for short options as well.
 .TP
 \fB\-c\fR, \fB\-\-chk_cond\fR
 sets the CK_COND bit in the ATA PASS\-THROUGH SCSI cdb. The
 default setting is clear (i.e. 0). When set the SATL should yield a
 sense buffer containing a ATA Result descriptor irrespective of whether
 the command succeeded or failed. When clear the SATL should only yield
 a sense buffer containing a ATA Result descriptor if the command failed.
 .TP
 \fB\-h\fR, \fB\-\-help\fR
 outputs the usage message summarizing command line options
 then exits. Ignores \fIDEVICE\fR if given.
 .TP
 \fB\-H\fR, \fB\-\-hex\fR
 outputs the ATA IDENTIFY (PACKET) DEVICE response in hex. The default
 action (i.e. without any '\-H' options) is to output the response in
 hex, grouped in 16 bit words (i.e. the ATA standard's preference).
 When given once, the response is output in ASCII hex bytes (i.e. the
 SCSI standard's preference). When given twice (i.e. '\-HH') the output
 is in hex, grouped in 16 bit words, the same as the default but without
 a header. When given thrice (i.e. '\-HHH') the output is in hex, grouped in
 16 bit words, in a format that is acceptable for 'hdparm \-\-Istdin' to
 process.
 .TP
 \fB\-l\fR, \fB\-\-len\fR=12 | 16
 this is the length of the SCSI cdb used for the ATA PASS\-THROUGH commands.
 The argument can either be 12 or 16. The default is 16. The larger cdb
 size is needed for 48 bit LBA addressing of ATA devices. On the other
 hand some SCSI transports cannot convey SCSI commands longer than 12 bytes.
 .TP
 \fB\-p\fR, \fB\-\-packet\fR
 send an ATA IDENTIFY PACKET DEVICE command (via the SATL). The default
 action is to send an ATA IDENTIFY DEVICE command.
 .TP
 \fB\-r\fR, \fB\-\-raw\fR
 output the ATA IDENTIFY (PACKET) DEVICE response 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.
 .TP
 \fB\-v\fR, \fB\-\-verbose\fR
 increases the level or verbosity.
 .TP
 \fB\-V\fR, \fB\-\-version\fR
 print out version string
 .SH NOTES
 Since the response to the IDENTIFY (PACKET) DEVICE command is very
 important for the correct use of an ATA(PI) device (and is typically the
 first command sent), a SATL should provide an ATA Information VPD page
 which contains the similar information.
 .PP
 The SCSI ATA PASS\-THROUGH (12) command's opcode is 0xa1 and it clashes with
 the MMC set's BLANK command used by cd/dvd writers. So a SATL in front
 of an ATAPI device that uses MMC (i.e. has peripheral device type 5)
 probably should treat opcode 0xa1 as a BLANK command and send it through
 to the cd/dvd drive. The ATA PASS\-THROUGH (16) command's opcode (0x85)
 does not clash with anything so it is a better choice.
 .PP
 In the 2.4 series of Linux kernels the \fIDEVICE\fR 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").
 .SH EXIT STATUS
 The exit status of sg_sat_identify is 0 when it is successful. Otherwise
 see the sg3_utils(8) man page.
 .SH AUTHOR
 Written by Doug Gilbert
 .SH "REPORTING BUGS"
 Report bugs to <dgilbert at interlog dot com>.
 .SH COPYRIGHT
 Copyright \(co 2006\-2007 Douglas Gilbert
 .br
 This software is distributed under a FreeBSD license. There is NO
 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 .SH "SEE ALSO"
 .B sg_vpd(sg3_utils), sg_inq(sg3_utils), sdparm(sdparm), hdparm(hdparm)
	.TH SG_SAT_IDENTIFY "8" "May 2007" "sg3_utils\-1.24" SG3_UTILS
	.SH NAME
	sg_sat_identify \- sends a ATA IDENTIFY (PACKET) DEVICE command via a
	SCSI to ATA Translation (SAT) layer
	.SH SYNOPSIS
	.B sg_sat_identify
	[\fI\-\-chk_cond\fR] [\fI\-\-help\fR] [\fI\-\-hex\fR] [\fI\-\-len=\fR12\|16]
	[\fI\-\-packet\fR] [\fI\-\-raw\fR] [\fI\-\-verbose\fR] [\fI\-\-version\fR]
	\fIDEVICE\fR
	.SH DESCRIPTION
	.\" Add any additional description here
	.PP
	This utility sends either an ATA IDENTIFY DEVICE command or an ATA IDENTIFY
	PACKET DEVICE command to \fIDEVICE\fR and outputs the response. The devices
	that respond to these commands are ATA disks and ATAPI devices respectively.
	Rather than send these commands directly to the device they are sent via a
	SCSI transport which is assumed to contain a SCSI to ATA Translation (SAT)
	Layer (SATL). The SAT standard (SAT ANSI INCITS 431\-2007, prior draft:
	sat\-r09.pdf at www.t10.org) defines two SCSI "ATA PASS\-THROUGH" commands:
	one using a 16 byte "cdb" and the other with a 12 byte cdb. This utility
	defaults to using the 16 byte cdb variant.
	.PP
	The SATL may be in an operating system driver, in host bus adapter firmware
	or in some external enclosure.
	.SH OPTIONS
	Arguments to long options are mandatory for short options as well.
	.TP
	\fB\-c\fR, \fB\-\-chk_cond\fR
	sets the CK_COND bit in the ATA PASS\-THROUGH SCSI cdb. The
	default setting is clear (i.e. 0). When set the SATL should yield a
	sense buffer containing a ATA Result descriptor irrespective of whether
	the command succeeded or failed. When clear the SATL should only yield
	a sense buffer containing a ATA Result descriptor if the command failed.
	.TP
	\fB\-h\fR, \fB\-\-help\fR
	outputs the usage message summarizing command line options
	then exits. Ignores \fIDEVICE\fR if given.
	.TP
	\fB\-H\fR, \fB\-\-hex\fR
	outputs the ATA IDENTIFY (PACKET) DEVICE response in hex. The default
	action (i.e. without any '\-H' options) is to output the response in
	hex, grouped in 16 bit words (i.e. the ATA standard's preference).
	When given once, the response is output in ASCII hex bytes (i.e. the
	SCSI standard's preference). When given twice (i.e. '\-HH') the output
	is in hex, grouped in 16 bit words, the same as the default but without
	a header. When given thrice (i.e. '\-HHH') the output is in hex, grouped in
	16 bit words, in a format that is acceptable for 'hdparm \-\-Istdin' to
	process.
	.TP
	\fB\-l\fR, \fB\-\-len\fR=12 \| 16
	this is the length of the SCSI cdb used for the ATA PASS\-THROUGH commands.
	The argument can either be 12 or 16. The default is 16. The larger cdb
	size is needed for 48 bit LBA addressing of ATA devices. On the other
	hand some SCSI transports cannot convey SCSI commands longer than 12 bytes.
	.TP
	\fB\-p\fR, \fB\-\-packet\fR
	send an ATA IDENTIFY PACKET DEVICE command (via the SATL). The default
	action is to send an ATA IDENTIFY DEVICE command.
	.TP
	\fB\-r\fR, \fB\-\-raw\fR
	output the ATA IDENTIFY (PACKET) DEVICE response 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.
	.TP
	\fB\-v\fR, \fB\-\-verbose\fR
	increases the level or verbosity.
	.TP
	\fB\-V\fR, \fB\-\-version\fR
	print out version string
	.SH NOTES
	Since the response to the IDENTIFY (PACKET) DEVICE command is very
	important for the correct use of an ATA(PI) device (and is typically the
	first command sent), a SATL should provide an ATA Information VPD page
	which contains the similar information.
	.PP
	The SCSI ATA PASS\-THROUGH (12) command's opcode is 0xa1 and it clashes with
	the MMC set's BLANK command used by cd/dvd writers. So a SATL in front
	of an ATAPI device that uses MMC (i.e. has peripheral device type 5)
	probably should treat opcode 0xa1 as a BLANK command and send it through
	to the cd/dvd drive. The ATA PASS\-THROUGH (16) command's opcode (0x85)
	does not clash with anything so it is a better choice.
	.PP
	In the 2.4 series of Linux kernels the \fIDEVICE\fR 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").
	.SH EXIT STATUS
	The exit status of sg_sat_identify is 0 when it is successful. Otherwise
	see the sg3_utils(8) man page.
	.SH AUTHOR
	Written by Doug Gilbert
	.SH "REPORTING BUGS"
	Report bugs to <dgilbert at interlog dot com>.
	.SH COPYRIGHT
	Copyright \(co 2006\-2007 Douglas Gilbert
	.br
	This software is distributed under a FreeBSD license. There is NO
	warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
	.SH "SEE ALSO"
	.B sg_vpd(sg3_utils), sg_inq(sg3_utils), sdparm(sdparm), hdparm(hdparm)