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.
-n, --noact
do nothing but check if the device is in use.
-f, --force
force spinning up/down the device even if it 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.
