255-700-019
7-35
PacketStar
™
PSAX 20 Access Concentrator User Guide
, Issue 1
Release 6.3.0
Chapter 7 Upgrading and Backing Up System Software
Restoring System Database Files
Field Descriptions
4
Select the values for the fields on this window from the values given in
Table 7-5.
Note:
We recommend that you use either the YModem or the YModem-
G protocol. Use the XModem protocol if that is the only one you
have available to use.
~
The YModem-G protocol allows the fastest transmission of the three
types; however, this protocol does not acknowledge receipt of packets.
You can receive all files grouped under a subdirectory at one time.
~
The YModem protocol is a slower method of transmission, but is more
reliable because it does acknowledge receipt of packets. You can
receive all files grouped under a subdirectory at one time.
~
The XModem protocol is a laborious method of transmission because
you must enter the filename of each file in the complete package of
software upgrade files to accomplish the upgrade task.
5
Select the
Receive
command and press Enter.
Table 7-5. Field Values for the XMODEM/YMODEM File Transfer Window
(Receive Options Panel)—Restoring Backup Files
Field Names
Values/Variables
Description
Protocol
Default: YModem
YModem protocol for receiving the
upgrade software files.
Ymodem-G
YModem-G protocol for receiving
the upgrade software files.
XModem
XModem protocol for receiving the
upgrade software files.
File Type
Default: Binary
Binary format is the type you use
most of the time.
Text
Text or ASCII format is available but
do not use it for restoring database
files.
Error Check
(displayed only
when the value
XModem
is
selected in the
Protocol
field)
Default: CRC-16
Indicates that the error checking
method is cyclical redundant check-
ing, 16 bits.
Checksum
Indicates that the error checking
method is arithmetic summation
checking, 8 bits.
Directory
/scsi/current/
Directory on the CPU module hard
disk where the backup database files
are to be restored.
Filename (dis-
played only
when the value
XModem
is
selected in the
Protocol
field)
filename
Filename on the CPU module hard
disk, which the backup database file
(of the same name) will overwrite.
Summary of Contents for PacketStar PSAX 20
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