This fragmentation forces the storage controller to perform multiple "seeks" to read a single file, significantly slowing down app launches and system responsiveness.
The host (phone's OS) identifies specific files or address ranges that are critical for performance. FBO Delivers Sustained Mobile Phone Performance
The host asks the storage device for the current physical fragmentation level of those files. This fragmentation forces the storage controller to perform
By physically reordering data into contiguous blocks, FBO can restore read speeds to "like-new" levels—for example, returning a degraded device to a 1900MB/s read speed. Market Implementation & Standards Implement File-Based optimization functionality - LWN.net FBO Delivers Sustained Mobile Phone Performance
If fragmentation is high, the host instructs the device to perform physical defragmentation .