Rockbox

When playing music on a Sansa (probably any flash-based player), the file buffer is rarely filled to capacity. buffering.c seem to rely on ata_disk_is_active() to return true to make full use of the buffer, but it always return false on flash targets. This behavior can be seen in the simulator by changing the ata_disk_is_active define (in buffering.c) to 0.

This could perhaps explain some strange buffering behavior on the Sansa, like occasional buffer under-runs or  FS#8037 .