<br><font size=2 face="sans-serif">That is good to know but might not help
us much. We typically are doing this while the system is still up
to prepare for an upgrade or something.</font>
<br>
<br><font size=2 face="sans-serif">Carlos</font>
<br>
<br>
<br>
<table width=100%>
<tr valign=top>
<td width=40%><font size=1 face="sans-serif"><b>"Simon, Bill"
<bills@tns.its.psu.edu></b> </font>
<p><font size=1 face="sans-serif">02/16/2007 10:22 AM</font>
<td width=59%>
<table width=100%>
<tr valign=top>
<td>
<div align=right><font size=1 face="sans-serif">To</font></div>
<td><font size=1 face="sans-serif">CarlosOrtiz@bayviewfinancial.com</font>
<tr valign=top>
<td>
<div align=right><font size=1 face="sans-serif">cc</font></div>
<td><font size=1 face="sans-serif">"Matt Slaga (US)" <Matt.Slaga@us.didata.com>,
cisco-voip-bounces@puck.nether.net, cisco-voip@puck.nether.net</font>
<tr valign=top>
<td>
<div align=right><font size=1 face="sans-serif">Subject</font></div>
<td><font size=1 face="sans-serif">Re: [cisco-voip] Drive Mirroring</font></table>
<br>
<table>
<tr valign=top>
<td>
<td></table>
<br></table>
<br>
<br>
<br><font size=2><tt>What we found on HP is if you mirror when the OS is
halted (e.g. go into <br>
the RAID BIOS screen on startup) it cuts down the time by at least half.<br>
<br>
The extra disk I/O involved with a running OS (and apps) slows it down
<br>
considerably. Same might be applicable to IBM.<br>
<br>
CarlosOrtiz@bayviewfinancial.com wrote:<br>
> <br>
> Hard to believe in this day and age you would have such a performance
<br>
> gap on comparable servers. Maybe someone has found a way to
cut it <br>
> down a bit.<br>
> <br>
> Carlos<br>
> <br>
> <br>
> Most of this is due to processor time. HP has always been way
ahead of <br>
> the curve compared to IBM with offloading most processor requirements
<br>
> onto the RAID card. Another reason I prefer compaq servers over
big blue.<br>
> <br>
> <br>
> <br>
> After working with the HP MCS servers and IBM MCS servers we have
found <br>
> a HUGE difference in rebuild time for mirrored drives. The
HP's <br>
> usually rebuild in about 20-30 mins. The IBM's take about 5
hrs. Is <br>
> there anything that can be done to speed up the IBM process? Are there
<br>
> any known issues?<br>
<br>
<br>
</tt></font>
<br>