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Bob Pierce wrote:
<blockquote cite="mid:1202221353.21639.101.camel@pc703.westman.int"
type="cite">
<pre wrap="">On Tue, 2008-02-05 at 08:55 -0500, Steve Totaro wrote:
</pre>
<blockquote type="cite">
<pre wrap="">I would go after RAID 5 and redundant power supplies.
</pre>
</blockquote>
<pre wrap=""><!---->
I totally agree on the RAID 5 and redundant power supplies. It would be
irresponsible not to get these.
Bob
</pre>
</blockquote>
<br>
Sorry to disagree, but RAID 1 would be far more responsible than RAID 5.<br>
<br>
RAID 1 is for critical data and gives better protection at a higher
cost. RAID 5 is for cheaper, bulk storage of less critical information.
In addition, RAID 5 has lower performance and higher failure rate (more
disks = more failures) than RAID 1.<br>
<br>
Asterisk's disk storage is critical to the operation of a critical
system and does not, generally speaking, require large amounts of
storage. In fact, you would be hard pushed to find drives
_small_enough_ to be right-sized for Asterisk!<br>
<br>
Best practice would be OS and Asterisk on RAID 1 and, if you have a
very high volume system (or you're into debug in a big way!), add some
RAID 5 for logging, recording, etc..<br>
<br>
You'll be amazed how much quicker and easier it is to recover from a
disk failure when the OS is still running.<br>
<br>
I have seen several instances where a single drive in a RAID 5 set has
suffered electrical failure and corrupted (or convinced the controller
that it has corrupted) multiple, otherwise good, drives on the bus.
Even taken out a hotspare at the same time. Think of it has an
electrical fart onto the bus. I have yet to see the same thing happen
with RAID 1. (and don't even think about asking how long I've been
watching systems fail!) :-)<br>
<br>
RAID 5 is great in it's place but why buy 3 drives when 2 will get you
a better result?<br>
<br>
regards,<br>
<br>
Drew<br>
<br>
<br>
<br>
<br>
<br>
<br>
<pre class="moz-signature" cols="72">--
Drew Gibson
Systems Administrator
OANDA Corporation
<a class="moz-txt-link-abbreviated" href="http://www.oanda.com">www.oanda.com</a>
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