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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 sup‐
              ported 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  ver‐
              bose, 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 compatibil‐
       ity entries" naming scheme is enabled.


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


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



                                          03 September 2001                             scsi-spin(8)