Category Archives: How-To

How-To

How to customize docker0 network options in Docker

By | August 11, 2015

This is a bit of a RANT, and a bit of a HOW-TO.  I probably do a 70% job of addressing either side, but that’s partially due to my frustration with the whole process that got me to this point. I’ve been very frustrated with my initial forays into docker. I wanted to learn docker… Read More »

Pure FlashArray – Quick/Easy Capacity Expansion

By | August 3, 2015

I drove up to Dallas the other day to add a shelf of storage for a customer’s DR array. They were very interested in seeing the physical installation, but they are based in San Antonio and it was difficult for them to break away for a day just to watch the install. I decided to document… Read More »

FreeBSD 9.2 supports ZFS TRIM/UNMAP

By | April 15, 2014

Just playing around with this today, and it’s very cool. FreeBSD 9.2 now supports TRIM/UNMAP for ZFS. To see if your disk is reporting the capability, look for kern.cam.da.<device>.delete_method where <device> is the number of the da device, i.e. /dev/da5 is “5” in that place. For example: # sysctl -a | grep delete_method kern.cam.da.0.delete_method: NONE kern.cam.da.1.delete_method:… Read More »

How to DOS (Denial of Service) an iSCSI Drobo

By | December 8, 2013

Here’s how you can reboot any iSCSI Drobo (DroboElite or B800i, anyhow) on your network: Install FreeBSD 8, 9 or 10 on a system or VM Fire up the iSCSI initiator (old version with FreeBSD 9 or earlier, or new version with FreeBSD 10 beta) Connect to the Drobo With the earlier version of the… Read More »