HP Network Storage Router m2402 - Manual (Page 54)

Configuration Overview
60 Network Storage Router M2402 User Guide
Indexed Maps
An Indexed map is initially empty and can be modified by the user.
Auto Assigned Maps
An Auto Assigned map is built dynamically and contains all of the devices found
during discovery. This map will change automatically any time the discovery
process finds a change in the devices attached. This map cannot be modified by
the user.
SCC Maps
An SCC map is only available on FC ports and contains only a single entry for
LUN 0. This LUN is a router controller LUN. Access to attached devices is
managed using SCC logical unit addressing.
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. In the event
that data does not transfer correctly, the router will return 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 Buffered
Tape Writes option must be disabled.