Exchange 2003 Cluster Question
- From: "Jose Medeiros" <josemedeiros@xxxxxxxxxxx>
- To: "[ExchangeList]" <exchangelist@xxxxxxxxxxxxx>
- Date: Sun, 27 Nov 2005 12:10:52 -0800
Hi Jeff,
I do not believe that the Compaq StorageWorks 4314 is a SAN ( Storage Area
Network ). This unit appears to be a DAS. To qualify as a SAN it generally
has to run Fibre Channel. However the NAS vendors are now trying to
re-market there NAS devices as a SAN suggesting that you also put in a
separate 1Gb or better copper lan, then technically that would also make a
NAS Storage Array using ISCSI device a SAN. Keep in mind that any more then
30 milliseconds of write delay can cause corruption in an Exchange Database,
that is why a real Fibre Channel SAN is preferred when it comes to Exchange
Servers. Fibre Channel does not have the overhead that TCP/IP does when
using ISCSI especially when you enable error checking in digest mode (
Highly Recommended ). TCP/IP offload cards from Adaptec, Qlogic, Emulex and
others solve this, however that also adds to the cost. In my opinion ISCSI
has a promising future and works well in small environments or in a
dedicated 1GB lan.
Here is a link that you may want to look at:
http://h18006.www1.hp.com/products/storageworks/msa1500cs/index.html
Regards,
Jose Medeiros :-)
----------------------------------------------------
----- Original Message -----
From: "Jeffrey Moscone" <jeff@xxxxxxxxxxxxxx>
To: <josemedeiros@xxxxxxxxxxx>
Sent: Sunday, November 27, 2005 11:30 AM
Subject: RE: [exchangelist] Re: Exchange 2003 Cluster Question
Thanks Jose,
I appreciate the info.
I have a Compaq StorageWorks 4314 SAN (attached to a server) and a Snap
Server 4100 (attached to the network).
I'll have to learn more about the ISCSI Software for the Snap and the
MSA500 for the Compaq and make a decision.
Thanks again.
Jeff
Jeffrey Moscone
jeff@xxxxxxxxxxxxxx
www.mosconeusa.com
-----Original Message-----
From: Jose Medeiros [mailto:josemedeiros@xxxxxxxxxxx]
Sent: Sunday, November 27, 2005 11:18 AM
To: [ExchangeList]
Subject: [exchangelist] Re: Exchange 2003 Cluster Question
http://www.MSExchange.org/
Hi Jeff,
You can use a NAS device using the ISCSI Initatator as long as the snap
server has ISCSI Target software. However if this is to be a heavily
used
server I would recommend against this unless it's on it's own Gigabit or
better LAN.
HP has a MSA 500 with Direct Attached Storage ( DAS ) which is low cost
and
supports clustering. If you already have the servers that you want to
use,
take a look at the HP MSA 1500, that is what I am using in our QA IT
Staging
lab and I am very happy with it.
Jose
----- Original Message -----
From: "Jeffrey Moscone" <jeff@xxxxxxxxxxxxxx>
To: "[ExchangeList]" <exchangelist@xxxxxxxxxxxxx>
Sent: Sunday, November 27, 2005 10:50 AM
Subject: [exchangelist] Exchange 2003 Cluster Question
http://www.MSExchange.org/
Please direct me to the correct forum if know one can answer this.
Thanks!!!
I need to set up a Microsoft Windows Server 2003 Enterprise cluster
(2node) with Exchange 2003 Enterprise. I've done a lot of research and
found much useful information pertaining to set up, but not much in the
storage arena. My question is can I use a NAS device for the quorum
data, such as a Snap Server that is attached to my LAN (via ethernet) or
do I need to have a SCSI Storage device with fiber connectivity between
servers and storage?
Thanks a lot.
Jeff
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