SG_SCAN

NAME

sg_scan - does a scan of sg devices (or given SCSI/ATAPI/ATA devices) and prints the results

SYNOPSIS

sg_scan [-a] [-i] [-n] [-w] [-x] [<sam_dev>]*

DESCRIPTION

If no <sam_dev> device 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 not "hang" on any device that another process holds an O_EXCL lock on.

Any given <sam_devs> device names are 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 IDENTITY command is tried.

-a: do alphabetical scan (i.e. sga, sgb, sgc)
-i: do a SCSI INQUIRY, output results in a second (indented) line. If the device is an ATA disk then output information from an ATA IDENTITY command
-n: do numeric scan (i.e. sg0, sg1...) [default]
-w: use a read/write flag when opening sg device (default is read-only)
-x: extra information output about queuing

AUTHORS

Written by D. Gilbert and F. Jansen

COPYRIGHT