ubuntu

Ubuntu 11 on Kingston SV100S2/256G SSD

Here are some notes about my attempt to install Ubuntu 11 on Kingston SV100S2/256G SSD (on Dell Latitude E6510 laptop). Just in case somebody else finds it useful.

I have Googled around for information about SSD disk optimization for Linux and found that there are two main things to consider: partition alignment and filesystem options.

It appears to be important to (try to) align disk writes by the boundaries of SDD erase block size. This [1] article talks about LVM volumes alignment.

Self-encrypting (FDE) Hard Disks & Linux

Recently I have upgraded to Dell Latitude E6510 with 4 cores / 8 threads processor, plenty of RAM, and a fast hard disk. Nevertheless, the interactive performance of Ubuntu becomes sloppy beyond any measure when a virtual machine or two start trashing the disks.

There seems to be known performance problems in Linux kernel, like Bug 12309. And full disk encryption makes things even worse. It appears that new FDE technology will give laptop users a chance to move the burden of encryption to hard drives.

Build NetExpect on Ubuntu 10

I came across a nice tool, potentially useful for pen testing: TCP/IP-aware version of TCL expect. Written by Eloy Paris from Cisco Systems it is currently distributed in sources only. I didn't have much time to play with it yet, but it looks very promising. Tomorrow will try to use it for SIP REGISTER flooding, currently done with sipp. (In a way, SIPP is similar to NetExpect, can execute send-expect scenarios, but seems to be focused on SIP protocol.)

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