scsi-spin(8)						      System Manager's Manual						      scsi-spin(8)

NAME

       scsi-spin - spin up and down a SCSI device

SYNOPSIS

       scsi-spin [-options...] [device]

DESCRIPTION

       scsi-spin let the user to manually spin up and down a SCSI device.

       This  command is particularly useful if you've got noisy (or hot) drives in a machine that you rarely need to access.  This is not the same
       as the kernel patch that's floating around that will automatically spin down the drive after some time.	scsi-spin  is  completely  manual,
       and spinning down a drive that's in use, especially the one containing the scsi-spin binary, is probably a really bad idea.

       To  avoid running in trouble with such cases, scsi-spin verifies that the device to work on is not currently in use by scanning the mounted
       file system description file for a partition living on it and issue an error if this the case.

OPTIONS

       -u, --up
	      spin up device.

       -d, --down
	      spin down device.

       -e, --loej
	      load or eject medium from drive (use along with -u or -d )

       -w, --wait=[n]
	      wait up to n seconds for the spin up/down command to complete. Default is to return immediately after the command was  sent  to  the
	      device.  Either repeat -w n times or set n to define the time to wait before to report a timeout.

       -l, --lock
	      prevent removal of medium from device.

       -L, --unlock
	      allow removal of medium from device.

       -I, --oldioctl
	      use  legacy  ioctl  interface  instead  of SG_IO to dialog with device (could not be supported on all platforms).  -e and -w are not
	      allowed with this option.

       -v, --verbose=[n]
	      verbose mode. Either repeat -v or set n accordingly to increase verbosity. 1 is verbose, 2 is debug (dump SCSI  commands	and  Sense
	      buffer).

       -f, --force
	      force spinning up/down the device even if it is in use.

       -n, --noact
	      do nothing but check if the device is in use.

       -p, --proc
	      use /proc/mounts instead of /etc/mtab to determine if the device is in use or not.

       device the  device  is  any  name  in the filesystem which points to a SCSI block device (sd, scd) or generic SCSI device (sg). See section
	      below.

SCSI devices naming convention
   Old kernel naming convention
       It is typically /dev/sd[a-z] , /dev/scd[0-9]* or /dev/sg[0-9]*.

   scsidev naming convention
       It is typically /dev/scsi/s[rdg]h[0-9]*-e????c?i?l?  or /dev/scsi/<aliasname>.

   devfs naming convention
       It  is  typically  /dev/scsi/host[0-9]/bus[0-9]/target[0-9]/lun[0-9]/disc   (same   for	 cd   and   generic   devices)	 or   short   name
       /dev/sd/c[0-9]b[0-9]t[0-9]u[0-9] when devfsd "new compatibility entries" naming scheme is enabled.

SEE ALSO

       scsiinfo(8), sg_start(8), sd(4), proc(5),

AUTHORS

       Eric Delaunay <delaunay@debian.org>, 2001
       Rob Browning <rlb@cs.utexas.edu>, 1998

								 03 September 2001						      scsi-spin(8)