Recently, I was researching trying to find the best option for adding flash memory to my Sony VAIO VGN-SZ381p notebook to take advantage of the Vista ReadyBoost feature.
Unfortunately, I couldn’t find any good information on which flash memory options were best for the Sony SZ. With flash memory being so cheap these days, it’s conceivable to get a 2GB USB or SD card for ~$40 and ideally leave it in my notebook fulltime.
According to the ReadyBoost information, you need flash memory that has at least 2.5 MB/sec for 4kb random reads and 1.75 MB/sec for 512kb random writes.
The Sony SZ series notebook have a few different options for connection flash memory.
First it has the conventional USB 2.0 ports so you can use simple USB keys. I don’t like this option since all USB keys would protrude from my laptop forcing me to remove it every time I shut it it down.
Second connection option is through the ExpressCard slot through a 5-in-1 memory card adaptor which supports Memory stick, Memory stick Pro, SD, xD and MMC.
The third option is through a dedicated Memory Stick DUO port on the left side of the notebook.
To do my tests, I used the built in Vista tool winsat which can be run from the command-line as follows:
winsat disk –read –ran –ransize 4096 –drive <drive_letter>
winsat disk –write –ran –ransize 524288 –drive <drive_letter>
- Substitute <drive_letter> with your drive letter without the colon. So ‘D:’ would be ‘D’.
- You have to run the command line as administrator in order to use the winsat to measure read and write speeds.
Here are the tests I’ve done so far: