I installed OSX on a USB stick, using a HFS+ filesystem. Although the OS is fully functional, it is incredibly slow, with frequent spinning wheel cursor.
I am using the fastest (and most expensive) USB2 flash stick I could find: Corsair Flash Voyager GTR, which is rated as 28MB/s write speed, which should be plenty. With it, I boot a 2007 mac mini, which has a USB2 interface.
My suspicion is that the slow performance is caused by the fact that there may be no write cache. Is there any way I can tell OSX to cache the writes to the USB stick, and use a large chunk of RAM to cache these writes?
CORSAIR FLASH DISK: Capacity: 31.62 GB (31,620,931,584 bytes) Available: 14.51 GB (14,508,220,416 bytes) Writable: Yes File System: Journaled HFS+ BSD Name: disk1s2 Mount Point: /Volumes/CORSAIR FLASH DISK