Bob - the raw-"write"-er

• Bob is a write to a block device.
• Bob, unlike Alice, always writes onto an existing part of the device:
  • No block allocations needed.
• Bob could be a direct operation - waiting until he gets to disk-haven...
• ...or an un-synced operation - getting into the buffer cache is enough.
• Note: mixing I/O via the cache and bypassing the cache - is a bad idea.

Originally written by guy keren