HP STORAGEWORKS E1200-160 - Manual (Page 33)

Configuration Overview
33 Network Storage Router e1200-160
Buffered Tape Writes
This option is designed to enhance system performance by returning status on
consecutive write commands prior to the tape device receiving data. If data does
not transfer correctly, the router returns a check condition on a subsequent
command.
Commands other than Write are not issued until status is received for any pending
Write, and status is not returned until the device completes the command. This
sequence is appropriate for tasks such as file backup or restore.
Some applications require confirmation of individual blocks being written to the
medium, such as for audit trail tapes or log tapes. In these instances, the Buffer
Tape Writes option must be disabled.