03-13-2013
Hardware RAID0 is always faster than a single disk because you can step the reads and writes across the two disks simultaneously. However, I have never come across a case where throughput was doubled. Typically you will get something like a 50% increase in throughput.
Software RAID0 can provide throughput improvement but typically less than hardware RAID0.
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LEARN ABOUT REDHAT
raid0run
raid0run(8) System Manager's Manual raid0run(8)
NAME
raid0run - starts up old (superblock-less) RAID0/LINEAR arrays
SYNOPSIS
raid0run [--configfile] [--version] [--force] [--upgrade] [-acvfuv] </dev/md?>+
DESCRIPTION
raid0run sets up a set of block devices into a single RAID0 array. It looks in its configuration file for the md devices mentioned on the
command line, and initializes those arrays. raid0run only works for RAID0 and LINEAR devices, it's ment as a compatibility/migration com-
mand for arrays created with old mdtools.
Note that initializing RAID devices with the wrong RAID configuration file might destroy all data on the consituent devices! RAID arrays
with superblocks are much safer and are auto-started by the kernel..
OPTIONS
-c, --configfile filename
Use filename as the configuration file (/etc/raidtab is used by default).
-a, --all
Starts up all nonpersistent RAID0 and LINEAR arrays defined in raidtab. It skips all persistent or non-RAID0/LINEAR arrays. This
switch is handy to be used in startup scripts for old installations.
-h, --help
Displays a short usage message, then exits.
-V, --version
Displays a short version message, then exits.
NOTES
The raidtools are derived from the md-tools and raidtools packages, which were originally written by Marc Zyngier, Miguel de Icaza, Gadi
Oxman, Bradley Ward Allen, and Ingo Molnar.
BUGS
no known bugs.
SEE ALSO
raidtab(5)
raid0run(8)