diff options
Diffstat (limited to 'sg_scan.8')
| -rw-r--r-- | sg_scan.8 | 41 |
1 files changed, 21 insertions, 20 deletions
@@ -1,51 +1,52 @@ -.TH SG_SCAN "8" "June 2006" "sg3_utils-1.21" SG3_UTILS +.TH SG_SCAN "8" "December 2006" "sg3_utils\-1.23" SG3_UTILS .SH NAME sg_scan \- does a scan of sg devices (or given SCSI/ATAPI/ATA devices) and prints the results .SH SYNOPSIS .B sg_scan -[\fI-a\fR] -[\fI-i\fR] -[\fI-n\fR] -[\fI-w\fR] -[\fI-x\fR] -[\fI<sam_dev>\fR]* +[\fI\-a\fR] +[\fI\-i\fR] +[\fI\-n\fR] +[\fI\-w\fR] +[\fI\-x\fR] +[\fIDEVICE\fR]* .SH DESCRIPTION .\" Add any additional description here .PP -If no <sam_dev> device names are given, sg_scan does a scan of the sg +If no \fIDEVICE\fR names are given, sg_scan does a scan of the sg devices and outputs a line of information for each sg device that is -currently bound to a SCSI device. Once any <sam_dev> is given only the -given <sam_dev>s are scanned. -Devices are opened with the O_NONBLOCK flag so that the scan will +currently bound to a SCSI device. If one or more \fIDEVICE\fRs are given +only those devices are scanned. +Each device is opened with the O_NONBLOCK flag so that the scan will not "hang" on any device that another process holds an O_EXCL lock on. .PP -Any given <sam_devs> device names are expected to comply +Any given \fIDEVICE\fR name is expected to comply with (to some extent) the Storage Architecture Model (SAM see www.t10.org). Any device names associated with the Linux SCSI subsystem (e.g. /dev/sda and /dev/st0m) are suitable. Devices names associated with ATAPI devices (e.g. most CD/DVD drives and ATAPI tape drives) are also suitable. If the device does not fall into the above categories then an ATA IDENTIFY command is tried. +.SH OPTIONS .TP --a +\fB\-a\fR do alphabetical scan (i.e. sga, sgb, sgc). Note that sg device nodes with an alphabetical index have been deprecated since the linux kernel 2.2 series. .TP --i +\fB\-i\fR do a SCSI INQUIRY, output results in a second (indented) line. If the device is an ATA disk then output information from an ATA IDENTIFY command .TP --n +\fB\-n\fR do numeric scan (i.e. sg0, sg1...) [default] .TP --w -use a read/write flag when opening sg device (default is read-only) +\fB\-w\fR +use a read/write flag when opening sg device (default is read\-only) .TP --x +\fB\-x\fR extra information output about queuing -.PP +.SH NOTES This utility was written at a time when hotplugging of SCSI devices was not supported in Linux. It used a simple algorithm to scan sg device nodes in ascending numeric or alphabetical order, stopping @@ -64,7 +65,7 @@ the sg3_utils(8) man page. .SH AUTHORS Written by D. Gilbert and F. Jansen .SH COPYRIGHT -Copyright \(co 1999-2006 Douglas Gilbert +Copyright \(co 1999\-2006 Douglas Gilbert .br This software is distributed under the GPL version 2. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |