Sunshine with INQ…
You know, this may be common knowledge, there may be a thousand other utilities that serve this function but I thought I would further propagate this utilities cause especially in the virtual world. INQ is the tool I speak of and it brings a whole lot of goodness. Ok its not that great, but it does allow you from a host perspective to map the LUN id of a specific volume. Useable? I think so.
Here is what you need, the binaries…located here, ftp://ftp.emc.com/pub/symm3000/inquiry/latest. Run the utility from the command line on any OS of which there is a tool. Below is what you will see…
If multiple arrays are attached to the host then verify the correct vendor. Here particularly we are focused on the DGC VEND which as you know is an EMC CLARiiON array. What we want to focus on is the first 2 digits which represent the LUN ID in Hex. Simply convert that number to decimal and you have your LUN ID.
Now here’s the downside, I haven’t figured out how to recognize LUN ID’s beyond 255 (FF) as the last two LUNs represent LUN ID 257 and 258. See what I mean, not so recognizable anymore from this utility but I assume I am missing something as most Symm LUN ID’s run well past 255. Maybe this is just a limitation of other array’s outside of Symm’s, anybody know?
