Well, XDA developers member Akusari just released version 1.0.2 of his SD-Booster application. This app allows you to change the read ahead speed of your SD card. By default that speed is set at 128KB, so if you have large files on your SD card, they will be read 128KB at a time. If your images are say 1.5MB large, then it takes Android 12 to 13 read operations to get the file into memory. When you use SD booster to set the read ahead to say 512KB, Android will only perform 3 read operations to get the file. This app does not increase the reading speed of your SD card, it will only reduce the number operations involving the SD card.
This does not translate into higher speeds when reading files, but less reads mean longer SD card life.
You will need a rooted phone in order for this app to work.
Go ahead and give it a try. Download from Android Market
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