02-13-2010
To be fair RAID 5 is going to be better than a single disc or jut a mirrored pair of discs.
Performance tuning is not an exact art, the figures can look terrible but if the machine is performing the task you want it to do okay then they are not a problem, if the machine is performing the required task then you start looking at the figures to see where the bottle neck is, once you deal with it another bottle neck may also need dealing with.
Suggestions:
Copy the contents of your current disks onto another set of discs in a stripe then reconstruct your RAID 5 set of discs into a stripe and mirror them against the first stripe?
Copy your current RAID 5 configuration onto 10K RPM discs?
Ensure you are using the fastest interface possible for your platform, i.e. SCSI or SATA tend to be faster than IDE?
Last edited by TonyFullerMalv; 02-13-2010 at 05:30 PM..
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LEARN ABOUT DEBIAN
linux-version
LINUX-VERSION(1) General Commands Manual LINUX-VERSION(1)
NAME
linux-version - operate on Linux kernel version strings
SYNOPSIS
linux-version compare VERSION1 OP VERSION2
linux-version sort [--reverse] [VERSION1 VERSION2 ...]
linux-version list [--paths]
DESCRIPTION
linux-version operates on Linux kernel version strings as reported by uname -r and used in file and directory names. These version strings
do not follow the same rules as Debian package version strings and should not be compared as such or as arbitrary strings.
compare VERSION1 OP VERSION2
Compare version strings, where OP is a binary operator. linux-version returns success (zero result) if the specified condition is
satisfied, and failure (nonzero result) otherwise. The valid operators are: lt le eq ne ge gt
sort [--reverse] [VERSION1 VERSION2 ...]
Sort the given version strings and print them in order from lowest to highest. If the --reverse option is used, print them in order
from highest to lowest.
If no version strings are given as arguments, the version strings will instead be read from standard input, one per line. They may
be suffixed by arbitrary text after a space, which will be included in the output. This means that, for example:
linux-version list --paths | linux-version sort --reverse
will list the installed versions and corresponding paths in order from highest to lowest version.
list [--paths]
List kernel versions installed in the customary location. If the --paths option, show the corresponding path for each version.
AUTHOR
linux-version and this manual page were written by Ben Hutchings as part of the Debian linux-base package.
30 March 2011 LINUX-VERSION(1)