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If it helps, this is my configuration:

Display Disk Configuration Protection                         Serial            
 Resource
ASP     Unit     Number           Type  Model     Name         Protection
1                                                                               
      Mirrored
            1         00-0D65027     6606     030     DD001         Controller
            1         00-0D71390     6606     030     DD002         Controller
            2         68-0B17840     6607     074     DD003         Device 
Parity
            3         68-0B86525     6607     074     DD004         Device 
Parity
            4         83-0686769     6607     070     DD010         Device 
Parity
            5         68-0A48382    6607     070     DD006          Device 
Parity
            6         68-0B72255    6607     074     DD007          Device 
Parity
            7         68-0A35098    6607     074     DD008          Device 
Parity
            8         68-0B32766    6607     070     DD009          Device 
Parity
          19         33-0D394A0    6713     072     DD047          Device Parity
          20         33-0D3951C    6713     072     DD049          Device Parity
          21         33-0D398B5    6713     072     DD051          Device Parity
          22         33-0D398B0    6713     072     DD052          Device Parity
2                                                                               
      Unprotected
            9        10-2438160     9337     59C     DD065           Device 
Parity
          10        10-2438140     9337     59C     DD058           Device 
Parity
          11        10-2438150     9337     59C     DD057           Device 
Parity
          12        10-2438030     9337     59C     DD056           Device 
Parity
          13        10-4438150     9337     59C     DD082           Device 
Parity
          14        10-4438030     9337     59C     DD054           Device 
Parity
          15        10-2438310     9337     59C     DD075           Device 
Parity
          16        10-2438300     9337     59C     DD085           Device 
Parity
          17        10-2438320     9337     59C     DD059           Device 
Parity
          18        10-2438190     9337     59C     DD050           Device 
Parity
          23        33-0D392C8     6713     072     DD053           Device 
Parity
          24        33-0D39428     6713     072     DD055           Device 
Parity
          25        33-0D39224     6713     072     DD061           Device 
Parity
          26        33-0D38C52     6713     072     DD062          Device Parity


----- Original Message -----
From: "Andy Nolen-Parkhouse" <aparkhouse@attbi.com>
To: <midrange-l@midrange.com>
Sent: Tuesday, June 04, 2002 3:27 PM
Subject: 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
>
> _______________________________________________
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