After implementing Cisco Nexus 5ks that include native Fibre Channel switching for shops that usually don’t have dedicated SAN guys, I’m often called up sometime later to offer a refresher on how to add zones. I usually share this tidbit via email, but here it is for the internets. These commands are very similar on newer MDS models, as well.
Happy Day-after Thanksgiving dear readers! I hope everyone is as satisfyingly full on food, friends, and family as I am. As an early gift to myself, I’m writing a PowerShell script that utilizes NetApp’s PowerShell Toolkit. The script will help me quickly determine current volume and LUN settings so I can see what LUNs are at risk of going offline due to out of space conditions. In scripting tradition, I couldn’t find anything online that did exactly what I wanted so I rolled my own!
Here’s what the output looks like. The column names are abbreviated because I expect to have several more columns. The abbreviations are, Volume Thin Provisioning, Fractional Reserve, Snapshots, Volume AutoGrow, Snapshot AutoDelete.
I’m often asked by my clients the best way to configure NetApp igroups when connecting to VMware VMFS LUNs, especially after I deploy a new system for them and I’m training them on their use. I appreciate the question because it means someone’s actually thinking through why something is configured the way it is rather than just throwing something together.
So this is what I see a lot of out in the field. Single igroups are created with multiple initiators from multiple hosts. This can be a problem, though, as I’ll show you. Functionally, this configuration will work – each host will be able to see each LUN, all things being equal. The problem arises when you want to either 1. remove a host from the igroup or 2. stop presenting a LUN to only a subset of hosts.
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So I’ve been asked to get up to speed on EMC. We’re really a Flexpod company, which includes Cisco, NetApp, and VMware, but we’re finding clients in our Dallas / Fort Worth market that are already EMC customers and would like to stay that way. Many times, it makes more sense for these shops to stick with EMC. One reason for this is that we find small to mid-size shops that already have the technical expertise to manage an EMC environment are sometimes reluctant to defenestrate the platform on which they’re most comfortable. Selling them a NetApp would not be setting them up for as much success as we would if we left them with hardware already in their management comfort zone, assuming the sale met their needs in the first place.
And so here I am, ready and raring to learn EMC. I’m already a NetApp dude and have a firm grasp on storage fundamentals, but this will be my first foray into EMC. While I’m already using my google-fu to find training aids, I’d love to hear the recommendations from the vCommunity on how best to learn EMC products.
I’m already tracking on Joe Kelly’s Pluralsight training which I’m sure I’ll lean on heavily. I also know that Nick Weaver has a simulator out there. What other free learning tools would you recommend?