RE: RAID in Exchange

  • From: "Mark Arnold" <mark@xxxxxxxx>
  • To: "[ExchangeList]" <exchangelist@xxxxxxxxxxxxx>
  • Date: Sun, 17 Nov 2002 22:20:23 -0000

Stephen.
You are of course fully entitled to your opinion and the expression
thereof.
I merely expressed my humble opinion that you can't "really" RAID an IDE
set. The emphasis was on the word really and you are entirely right to
offer the questioner IDE RAID solutions, and the suggestion that an
experienced SBS professional be engaged.
 
Of course, one asks a question like this and there will always be
innumerable answers.
 
I would never design, offer, agree to support or countenance Exchange on
IDE base RAID sets, howsoever controlled. It's a personal opinion, and I
know of no-one in my peer group in the UK who would ever do so, as with
another correspondent, I/we would be "very uncomfortable with it" (their
quotes). Again it's purely an opinion, to be taken at face value and
nothing else.
 
As for your request for the backing up of facts surrounding the
configuration, which transcends any hardware:
 
RAID 1 for the OS I think is a given? Why have RAID for the databases if
the OS has no resiliency
 
RAID 1 for the Logs. The point here is not necessarily to split them
from the RAID 1 OS, but to ensure a split from the RAID5. If you loose
two drives on the stores (RAID 5) you can restore from the previous
nights backup and roll the logs forward with zero loss of data. Co
hosting the logs on the same RAID set as the stores leaves you
vulnerable to a data loss not exceeding 23 hours 59 minutes.
 
Which part of "3 or more drives in RAID5 for the exchange stores" need
backing up with facts?
 
Thank you for your comments and the opportunity for me to clarify my ill
advised use of the word "really".
 
 
-----Original Message-----
From: Stephen Hartley [mailto:shartley@xxxxxxxxxxxxxxxxx] 
Sent: 15 November 2002 21:18
To: [ExchangeList]
Subject: [exchangelist] RE: RAID in Exchange
 
http://www.MSExchange.org/
RUBBISH
 
-----Original Message-----
From: Mark Arnold [mailto:mark@xxxxxxxx] 
Sent: Friday, November 15, 2002 9:29 PM
To: [ExchangeList]
Subject: [exchangelist] RE: RAID in Exchange
 
http://www.MSExchange.org/
You can't really RAID an IDE set.[Stephen Hartley responds]  Rubbish!
You need a SCSI subsystem which is where the "every hard disk uses its
own controller" sentence comes in.[Stephen Hartley responds]  Rubbish
The optimal for Exchange is hardware raid with the following
configuration:[Stephen Hartley responds]  In your opinion - back it up
with some facts!
2 drives in RAID1 for the operating system.
2 drives in RAID1 for the Exchange logs.
3 or more drives in RAID5 for the exchange stores.
 
The RAID1 number of drives can be reduced from two individual RAID1 sets
to a pair of drives in RAID1 with two partitions.
 
If you have to use IDE then you might do it this way:
Controller 0 Primary - Operating System
Controller 0 Slave - Exchange Install and Logs
Controller 1 Primary - Mirrored stores
Controller 1 Slave - Mirrored stores
 
There are several options, all of which give varying degrees of
resilience/performance mixes.
 
-----Original Message-----
From: Boed Yun [mailto:boedy@xxxxxxxxxxxxxx] 
Sent: 15 November 2002 10:32
To: [ExchangeList]
Subject: [exchangelist] RAID in Exchange
 
I am a new in IT World and have a stupid question , I've ever post this
message but never get an answer. I want to build Exchange Server. and I
plan to use several HD (I use all IDE both primary and secondary) , they
say I could improve performance by using RAID0 or RAID5 because every
harddisk use its own controller. Can I use that ? or anyone have an idea
?
and sometimes I confuse about harddisk contoller. a friend told me that
it's on the harddisk ( PCB attached to Harddisk) but someone else told
me that it's on the motherboard or separate card.
I don't know which one is correct .
 
------------------------------------------------------
List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist
Exchange Newsletters: http://www.msexchange.org/pages/newsletter.asp
Exchange FAQ: http://www.msexchange.org/pages/larticle.asp?type=FAQ
------------------------------------------------------
ISA Server Resource Site: http://www.isaserver.org
Windows Security Resource Site: http://www.windowsecurity.com/
Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com
------------------------------------------------------
You are currently subscribed to this MSExchange.org Discussion List as:
exchlist@xxxxxxxxxxxxxxxxx
To unsubscribe send a blank email to
$subst('Email.Unsub') 
------------------------------------------------------
List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist
Exchange Newsletters: http://www.msexchange.org/pages/newsletter.asp
Exchange FAQ: http://www.msexchange.org/pages/larticle.asp?type=FAQ
------------------------------------------------------
ISA Server Resource Site: http://www.isaserver.org
Windows Security Resource Site: http://www.windowsecurity.com/
Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com
------------------------------------------------------
You are currently subscribed to this MSExchange.org Discussion List as:
Mark@xxxxxxxx
To unsubscribe send a blank email to
$subst('Email.Unsub') 

Other related posts: