RE: Disk Failure UPDATE

James,

The 500 discussed in this thread lends itself to that configuration.
There are four disk slots in the system unit which are driven by the
MFIOP.  For additional drives, either an expansion chassis or top hat is
added which would have room for eight or sixteen additional drives
driven by an additional disk controller.  So the default configuration
on a model 500 is to mirror the load source and then add additional RAID
sets in expansion units.

With the 6xx models and following, there is generally room in the system
enclosure for at least one full RAID set.  In my experience, most
machines are configured with the load source disk as part of a RAID set.
It is a matter of a slight increase in protection with mirroring and
some additional expense.  Most installations seem to choose the
configuration you have described.

What model are you configuring?

Regards,
Andy Nolen-Parkhouse

> Subject: Re: Disk Failure UPDATE
>
> Folks,
>
> In reading this thread, and recalling another, I'm starting to get
nervous
> that
> we set up a machine incorrectly. :(
>
> We have 9 drives in a RAID set, But I keep reading that the load drive
has
> been
> mirrored and the remaining drives RAIDed.
>
> Recommendations? Pros and Cons pls.
>
> BTW, the machine is NOT yet in production and we have time to do it
all
> over
> again if we have to.
>
> TIA