X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=extras%2Fscsi_id%2Fscsi_id.8;h=691d5b8b05677c7cefef479f8a38bc4a2f025307;hb=0e5f8a1fcc4b2bb020d865075bb8e543f5b0c230;hp=591bb79366a03bad8769fcdf45b84800cf66175a;hpb=01f950e2eb86563255a269ecadd386cbe5361d0c;p=elogind.git

diff --git a/extras/scsi_id/scsi_id.8 b/extras/scsi_id/scsi_id.8
index 591bb7936..691d5b8b0 100644
--- a/extras/scsi_id/scsi_id.8
+++ b/extras/scsi_id/scsi_id.8
@@ -53,9 +53,14 @@ identifier starts with the NAA value of 6):
 .SH OPTIONS
 .TP
 .BI subsystem
-When called with only a single argument without a leading \-, runs in a hotplug
-mode, and expects the environment variable DEVPATH to specify the
-corresponding sysfs device. See section below on usage with \fBudev\fP.
+Deprecated method: when called with only a single argument without a
+leading \-, runs in a hotplug mode, and expects the environment variable
+DEVPATH to specify the corresponding sysfs device. See section below on
+usage with \fBudev\fP.
+.TP
+.BI \-a
+Always print information (model, vendor strings) about the device even
+if it does not support VPD pages.
 .TP
 .BI \-b
 The default behaviour \- treat the device as black listed, and do nothing
@@ -66,6 +71,8 @@ Instead
 of determining and creating a device node based on a sysfs dev
 entry as done for the \fB\-s\fP, send SG_IO commands to 
 \fBdevice\fP, such as \fB/dev/sdc\fP.
+This argument should also be used when invoked via udev to avoid problems
+with creation of temporary files on not-yet writable directories.
 .TP
 .BI \-f "\| config\-file"
 Read configuration and black/white list entries from
@@ -84,10 +91,18 @@ to generate any output.
 Prefix the identification string with the  driver model (sysfs) bus id of
 the SCSI device.
 .TP
-.BI \-p "\| 0x80 | 0x83"
-Use SCSI INQUIRY VPD page code 0x80 or 0x83. The default behaviour is to
-query the available VPD pages, and use page 0x83 if found, else page 0x80
-if found, else nothing.
+.BI \-p "\| 0x80 | 0x83 | pre-spc3-83"
+Use SCSI INQUIRY VPD page code 0x80, 0x83, or pre-spc3-83.
+.sp
+The default
+behaviour is to query the availabe VPD pages, and use page 0x83 if found,
+else page 0x80 if found, else nothing.
+.sp
+Page pre-spc3-83 should only be utilized for those scsi devices which
+are not compliant with the SPC-2 or SPC-3 format for page 83.  While this
+option is used for older model 4, 5, and 6 EMC Symmetrix devices, its
+use with SPC-2 or SPC-3 compliant devices will fallback to the page 83
+format supported by these devices.
 .TP
 .BI \-s "\| sysfs\-device"
 Generate an id for the
@@ -96,7 +111,10 @@ The sysfs mount point must not be included. For example, use /block/sd,
 not /sys/block/sd.
 .TP
 .BI \-u
-Reformat the output : replace all whitespaces by underscores
+Reformat the output : replace all whitespaces by underscores.
+.TP
+.BI \-x
+Export all data in KEY=<value> format used to import in other programs.
 .TP
 .BI \-v
 Generate verbose debugging output.
@@ -106,15 +124,15 @@ Display version number and exit.
 .RE
 
 .SH USAGE WITH UDEV 
+
 If \fBscsi_id\fP is invoked with one argument without a leading \-, it
 assumes it is called for a hotplug event, and looks for the sysfs device
-in the DEVPATH environment variable. 
-
-This mode is used when run via the \fBudev\fP PROGRAM key. Passing any
-arguments or options as part of the PROGRAM rule breaks this assumption,
-and the results will likely not be as expected.
+in the DEVPATH environment variable. This mode is deprecated, but
+available for backwards compatibility.
 
-When in this mode, all errors and warnings are sent via syslog.
+If the DEVPATH environment variable is set, scsi_id assumes it has been
+invoked via udev (or some other hotplug program), and all errors or
+warnings are sent using syslog.
 
 To determine the specific value needed in a RESULT key, use the \-s option,
 for example:
@@ -125,13 +143,18 @@ for example:
 .fi
 .P
 
-An example \fBudev\fP rule using \fBscsi_id\fP, that will name a block
+\fBscsi_id\fP is one of the tools used in the "Linux Persistent Device Names"
+scheme that creates persistent device links in /dev/disk. It is called with
+the -x option which will print all values in a defined format to let udev
+import it into its own environment for later event processing.
+.sp
+An example custom \fBudev\fP rule using \fBscsi_id\fP, that will name a block
 device and any partitions for the device matching the \fBscsi_id\fP output
 of 312345:
 
 .sp
 .nf
-BUS="scsi", PROGRAM="/sbin/scsi_id", RESULT="312345", NAME="disk%n"
+BUS=="scsi", PROGRAM=="/sbin/scsi_id -d %N -s %p", RESULT=="312345", NAME="disk%n"
 .fi
 .P
 
@@ -143,7 +166,7 @@ BUS="scsi", PROGRAM="/sbin/scsi_id", RESULT="312345", NAME="disk%n"
 .fi
 .LP
 .SH "SEE ALSO"
-.BR udev (8), hotplug (8)
+.BR udev (8)
 .SH AUTHORS
 Developed by Patrick Mansfield <patmans@us.ibm.com> based on SCSI ID
 source included in earlier linux 2.5 kernels, sg_utils source, and SCSI