03-28-2014
From the man page:
Quote:
wait [n ...]
Wait for each specified process and return its termination status. Each n may be a process ID or a job specification; if a job spec is given, all processes in that job's pipeline are waited for. If n is not given, all currently active child processes are waited for, and the return status is zero. If n specifies a non-existent process or job, the return status is 127. Otherwise, the return status is the exit status of the last process or job waited for.
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LEARN ABOUT CENTOS
scsi_start
SCSI_START(8) SG3_UTILS SCSI_START(8)
NAME
scsi_start - start one or more SCSI disks
SYNOPSIS
scsi_start [--help] [--verbose] [--wait] DEVICE [DEVICE]*
DESCRIPTION
This bash shell script calls the sg_start utility on each given DEVICE. The purpose is to spin up (start) each given DEVICE.
OPTIONS
Arguments to long options are mandatory for short options as well.
-h, --help
print out the usage message then exit.
-v, --verbose
increase level or verbosity.
-w, --wait
wait for the spin up (start) on each given DEVICE to complete. The default action is to do each start in immediate mode.
NOTES
If a large number of disks are spun up at the same time (i.e. without the --wait option) then the power supply may be overloaded.
EXIT STATUS
The exit status of this script is 0 when it is successful. Otherwise the exit status is that of the last sg_start utility called. See the
sg3_utils(8) man page.
AUTHORS
Written by D. Gilbert
COPYRIGHT
Copyright (C) 2009-2013 Douglas Gilbert
This software is distributed under a FreeBSD license. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PUR-
POSE.
SEE ALSO
sg_start (sg3_utils)
sg3_utils-1.36 May 2013 SCSI_START(8)