IT Answers » CLARiiON

EMC SAN Expansion in VMware

Nealkal — Mon, 13 Sep 2010 16:39:53 +0000

Hello
We have an EMC SAN Clariion connected to 5 VM Hosts. I recently put in five more 500 GB hard drives into the SAN. When I went to expand it into our VMware virtual disk the expansion took around 8 hours. The problem I am having now is that the SAN is now running extremely slow. I have VM’s that had C drives on the SAN that can no longer run because the SAN is so slow. I expanded the space almost a week ago. Does anyone know why the SAN would run so slow after I expanded the space? Could the SAN still be doing some configuring that is slowing everything down?

What do EMC recommend as best raid group for RAID 6, (8+2)?

VIP09 — Thu, 31 Jul 2008 13:23:08 +0000

What do EMC recommend as best practices for number of disks in a raid group for RAID 6, (8+2) with SATA drives with A CX3 Clariion array?

EMC Clariion CX700 Problems – Data Sector Invalidated

UniCal — Wed, 15 Nov 2006 17:44:08 +0000

Hello,
I have two EMC Clariion CX700′s (which, for convenience we call CX700-1 and CX700-2) and one recently added CX3-40 in my SAN environment using fiber-switch fabric. Over the weekend, I experienced a hardware failure on SPA on CX700-1. After having it replaced by my vendor’s technician and getting the SP to reboot successfully, all was fine until 2 hours later when I got another unwelcomed alert, this time it was about an uncorrectable sector (Data Sector Invalidated):

“Event Number 840
Severity Warning Host CX700-1_SPA
Storage Array APMxx SPA Device Bus 1 Enclosure 3 Disk 3
Description Data Sector Invalidated”

Since then, I’ve been getting the same “Data Sector Invalidated – Bus 1 Enclosure 3 Disk 3″ error at least once every day. The only solution to this as I gathered from my vendor is to unbind and then rebind the LUNs on this disk as there is a good chance some of my data within the LUNs have been corrupted — hence the uncorrectable sector error.
Has anyone else have this experience before? Is this a common occurrence from the Clariion CX-series product? As of now, I am still uncertain how the sector became uncorrectable and what lead/caused the data corruption.

Unrelated to this, I am also having performance issues (in particular, forced flushing) every other week. As a long-term solution, I am getting quite concerned about my SAN environment. If possible, can anyone share some of their experiences with the EMC Clariion CX-series line?

Any input is greatly appreciated!
Thank you.

iSCSI vs FC SAN

Jennifer2005 — Thu, 20 Oct 2005 10:01:26 +0000

We are trying to determine if there is any impact to MS SQL 2000 servers given either a iSCSI SAN vs Fibre Channel SAN. The majority of the databases are read/query intensive during the day, and write intensive during the overnight job cycle. Currently we have 8 SQL database servers (Windows 2000) which we would like to attach to a SAN with FC disks. Haven’t found much information comparing these 2 technologies specifically for SQL servers. We are comparing EMC CX500i vs StorageTek Flexline 340 (FC). Any information would be helfpul with this or with how to select the right technology. Thank you.