As far as I know, there isn't any real advantages between a PERC card for RAID and embedded RAID.  You can argue that if the PERC card goes bad, you can replace it more easily than having to replace a motherboard to fix a RAID problem.  I don't know anyone who buys extra PERC cards just in case.
The configurations of the PERC card and embedded RAID are similar. 
Firmin Charlot
-----Original Message-----
From: Linda Losik [mailto:[log in to unmask]]
Sent: Friday, June 24, 2005 1:11 PM
To: [log in to unmask]
Subject: Re: [MSUNAG] PERC Card Clarification

It does depend on what you want to do with the server.  If there is a machine that is critical with littler or no down time, then split the backplane using dual processors, one to be RAID 1 and the other to be RAID 5.  If it is mission critical with no down time, then RAID 10 would be appropriate.



From: MSU Network Administrators Group [mailto:[log in to unmask]] On Behalf Of Arthur H. Shank II (Chip)
Sent: Friday, June 24, 2005 10:35 AM
To: [log in to unmask]
Subject: [MSUNAG] PERC Card Clarification


Does anybody have a strong opinion on the benefits/differences to the following PERC cards, that can be ordered on DELL Poweredge Servers?


We will be running RAID 5… and currently I was just going to stick with the EMBEDDED perc, as I have done in the past….  I don’t see any real advantage to having the extra CARD???


1. Embedded PERC4ei


2. PERC4/DC card


3. On-Board RAID 5, Split Backplane








Arthur H. Shank II (Chip)

Michigan State University

Department of Psychology

Systems Programmer & Administrator

312 Psychology Bldg.