Author Archives: Robert Small

Grep one file against another

This came in handy the other day, I was looking to grep a list of things I needed against a list of things I had available. I’d quite forgotten I knew how to do this until it suddenly sprang on … Continue reading

Posted in Uncategorized | Tagged , , , | Leave a comment

Building stronger networks

This post is at least half inspired by the massive force of water that descended on the Chicagoland region in the summer. What I realised very quickly is that the roads and the water drainage systems were not designed to … Continue reading

Posted in Uncategorized | Tagged , , , , , | 1 Comment

Troubleshooting connectivity

One of the things that I’ve discovered over years of troubleshooting vast and various connection problems is that it’s almost impossible to jump to the right conclusion about a problem. There are always things that surprise you, always aspects that … Continue reading

Posted in Uncategorized | Tagged , , , , , , , , , , | Leave a comment

Understanding RAID levels

Why is RAID so difficult to understand? Probably because the algorithms are pretty complex and there are so many levels to RAID. Possibly because it sounds complicated, most likely because it’s too easy to get lost in the details and … Continue reading

Posted in Uncategorized | Tagged , , , , , , , , | 1 Comment

Why users should never hear of the ping command.

As harsh as it sounds this is partially because of the ‘give a mouse a cookie and he’ll try to use it as an umbrella at which point you’ve done him more harm than good’ scenario. If you give a … Continue reading

Posted in Uncategorized | Tagged , , , , , | 1 Comment

Recovering a hardware RAID from failing disks

Recovering hard drives from a failing RAID is never fun. By the very nature of RAID you don’t really have a chance to just pipe files off a disk so you’re in for some work. The fear with drive failure … Continue reading

Posted in Uncategorized | Tagged , , , , , , , | Leave a comment

Setting up a Windows 7 Virtual Machine for Cisco SDM and CCP

I recently had to build a Windows 7 Virtual Machine for use with Cisco’s SDM and Cisco Configuration Professional. As you may be aware this requires some specific versions of the required software. It seemed to helpful to link to … Continue reading

Posted in Uncategorized | Tagged , , , , , , , , , | 2 Comments