Author Archives: mezzantrop

About mezzantrop

10 years of experience in large SAN and storage environments: mainly Hitachi, HP and Brocade. Now I am a proud SAN/storage IBMer. Empty – expect-like tool author. FreeBSD enthusiast.

Executing a batch of commands on multiple IBM SVC/Storwize storage systems

Sometimes you have to change several configuration parameters or run multiple commands over a list of IBM SVC storage systems. Here is my small Python 3 script to do the stuff quickly. It requires Paramiko module to handle SSH interactions. Edit … Continue reading

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Scan IBM SVC/Storwize system for “SCSI ID Mismatches”

A small addition to the SAN/Storage CLI Toolbox which shows so called SCSI ID (LUN) mismatches on IBM SVC/Storwize systems. This Bourne shell/awk script shows the list of the same vdisks that are mapped with different SCSI IDs. Should be useful … Continue reading

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Accessing HP/3PAR storage systems using Python and SSH

I have just found a small script on Python 3 which I wrote for D81S to test a connection with HP/3PAR 7xxx arrays. It still looks like a good example of the subject, so I decided to store it for … Continue reading

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Short memo on COUNTIFS(), SUMIFS() and VLOOKUP() functions in MS Excel

Not using Excel very often, I sometimes have to waste my time searching Office support site for these functions in order to refresh in memory their tricky syntax and usage limitations. Today I decided to gather everything I know about … Continue reading

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LLFD – Link, Login, Fabric, Devices

Have just prepared a brief cheat sheet to remind which processes begin when we connect an HBA with the Brocade Fiber Channel switch port, in other words, when a device joins a fabric. LINK Signal transition (light/electrical) Speed negotiation Character … Continue reading

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What is the name of a new drive in my FreeBSD box

or a quick way to list GEOM configuration in FreeBSD Drives related information questions, including that one in the title, may be tricky for a new (and sometimes for an experienced) FreeBSD user, and even Handbook advises to see the “dmesg” … Continue reading

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Excel formulas syntax

Once, I thought embedding SQL requests into a code was the most boring thing I could imagine. Now I’m losing all my marbles while trying to push MS Excel formulas into my Python script.

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