Lars Appel wrote:
>
> > ... I was told to use maximum number if drives (i.e 12- 9GB instead
> >of 6 -18GB) and only fill them 50%.   My problem is I have a hard time
> >convincing management to buy 300GB when we only really need 150GB.
>
> Isn't that how mirroring is supposed to work (having 2 identical copies)?

Just ask them what the cost to the business would be if what's stored
on the 150GB of data was lost!  Maybe you can thus convince them to
buy a second 12H and use MIrror/iX to mirror between both of them.

Remember, mirrors aren't 100% insurance either.  We just lost
4x8GB of space that was fully mirrored (yes, 8x8GB of raw disk) when
the array (a Nike model 30 on a hp 9000) decided neither of the
redundant controllers "owned" the disks.  We restored from the
last tape backup, but we still lost most of a day's data entry.

It's not just disk failures that cause disasters!

Richard
--
Richard L Gambrell
Senior Information Technology Consultant
University of Tennessee at Chattanooga
103 Hunter Hall, Dept. 4454
615 McCallie Ave., Chattanooga, TN 37403-2598
voice mail/cell phone: 423-432-5122
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UTC fax: 423-755-4150
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