This guy is full of it.  According to Loney & Theriault in Oracle8i DBA
Handbook ch. 4 - Physical DB Layouts.  The minimum recommended is 7 HD's.
The ideal is 22.   You are much better off with more smaller size drives
than with fewer larger sized drives.

My $0.02 worth,

Ken Janusz, CPIM 
Database Conversion 
Lead Sufficient System, Inc.  
Minneapolis, MN


 -----Original Message-----
Sent:   Tuesday, December 18, 2001 1:00 PM
To:     Multiple recipients of list ORACLE-L
Subject:        hard disk configuration question

We are in the process of buying new hardware, and our original configuration
called for 10 18 GB drives in a Hitachi disk array cabinet.  We are getting
some sales pressure to change this to 5 36 GB disks.  Now I was planning to
spread our DB out over as many mirrored pairs as possible, or maybe even
including one RAID1+0 array.  The sales folks at Hitachi are telling us that
with their new drive array technology, spreading our Data files over as many
disks as possible is not necessary. I am supposed to talk to one of their
engineers in an hour or so.

I am just wondering if there really is some magic bullet technology I have
missed out on, or is there sales guy full of hooey?


They are also pushing the presence of two internal(not in the drive cabinet)
drives as alleviating any space concerns.  I am wondering what I can use
those drives for.  I don't think I want to software mirror them, but maybe
Sun does this better than I think.  Without some kind of redundancy I am
reluctant to use these disks for any DB purposes.  Any thoughts here are
appreciated as well.

Thanks,

Steve McClure

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