Archive for December, 2010

USB2 is a significant bottleneck for new hard disks

Monday, December 13th, 2010

I have a USB2 dock that accepts SATA drives. On Ubuntu 10.10, just writing raw data to the SATA disks results in just about 22-28MB/s streaming write. I used ‘dd if=/tmp/test_file_1G of=/dev/sdb bs=1M’. The first time I got around 22MB/s, then the source file was in the kernel’s disk cache, so on subsequent runs, the speed jumped up to ~28MB/s. Well below the almost ~70MB/s streaming write that the drive can do (according to other posts on the web).

Then I formatted the disk with ext2 and mounted it and tried copying that same source file there with rsync. The transfer speed was ~21-25MB/s over a bunch of iterations.

using latest 64-bit Flash player

Friday, December 10th, 2010

The newest 64-bit build of Adobe Flash Player is the “Square” beta, downloadable here: http://labs.adobe.com/downloads/flashplayer10_square.html

After untarring and moving the libflashplayer.so into my /usr/lib64/chromium-browser/plugins the Adobe test page shows I’m running Flash version 10,3,162,29. I’m using the Chromium daily builds PPA for Ubuntu: https://launchpad.net/~chromium-daily/+archive/ppa so my current Chromium version is 10.0.607.0(68819)

This is on Ubuntu 10.10 64-bit desktop.

This version crashes less often than the built-in Chrome flashplayer. But sadly the “about:flags” click-to-play setting doesn’t seem to have any effect on the 10.3 flashplayer.