Recently I have done a couple of posts on the EqualLogic CLI, updating firmware and collecting log informaiton. Well in my travels I came across the fact that EqualLogic is NetBSD underneath the pretty exterior, with this in mind I started doing a little digging around with the mentality that there must be some information you can extract form your EqualLogic using standard NetBSD commands, afterall it is just a BASH shell!
take a look over here at what I found - Undocumented EqualLogic CLI commands
Please be mindful that entering the support layer of an EqualLogic is not supported in a normal situation by EqualLogic as stated in the message you will recieve upon entering.
"You are running a support command, which is normally restricted to PS Series Technical Support personnel. Do not use a support command without instruction from Technical Support."
I would only recommend using the support command in a test/development environment or unless you really know what you are doing.
After running EqualLogic for a couple of years now, I have never experienced any real issues with the boxes. Running what seems to be a customized version of NetBSD they have proven to be fast, and reliable systems.
I was performing what is now a routine Firmware update from version 5.1.1 to 5.1.2, I have already done this on a PS6000 we have setup for Replication with no issue what so ever, and left upgrading our production Array untill I was happy that the Replication Array was working fine with the new firmware. Satisfied I decided to update our production PS6000 to FW 5.1.2. During the upgrade I recieved a Kernel Panic and subsequent Panic Recovery, looks like the controller crashed during the update this resulted in the iSCSI targets being unavailable for a couple of minutes, the controllers did not fail over and I now have a Firmware mismatch.
Now that our new PS6000 is initialized and ready to go, we started to look at replication and what we wanted to achieve in terms of backup/recovery and failover/failback. The idea was to replicate our Hyper-V virtual Machines to this second PS Series group and also all our users data. The Second PS Series group will be onsite but at the furthest most point away from our primary PS Series group in a seperate building. We also needed to look at our SAN Network topology and how we needed to extend this to give us the High Availability and bandwidth we required.
EqualLogic comes with SAN based replication built into the inclusive licensing model and with tools such as SANHQ and Dell's Manual Transfer Utility or MTU for short configuring replication is once again a nice and easy process.
Firsty lets take a quick look at what EqualLogic replication is and what it involves.
This morning we have just taken delivery of our third EqualLogic PS Series array. A PS6000 with 32TB of storage, this new addition to our SAN infrastructure is going to be a replication partner to our existing EqualLogic group. I am going to be blogging about this replication project as I get going with it but firstly thought I would take the opportunity go through deploying a PS Array step by step straight out of the box and creating a new group.