Service manual

71Chapter 7 Upgrades and Troubleshooting
Cyclades-TS Installation & Service Manual
This is because the test is receiving the DTR signal sent through the DCD and DSR pins. When Ctrl-R is typed,
the Xs in the RTS and CTS columns should move together. If the Xs change position as described, the signals
are being sent and received correctly.
Single User Mode
The Cyclades-TS has a single user mode used when:
• The name or password of the user with root privileges is lost or forgotten,
• After an upgrade or downgrade which leaves the Cyclades-TS unstable,
• After a configuration change which leaves the Cyclades-TS inoperative or unstable.
Type the word “ single” (with a blank space before the word) during boot using a console connection. This
cannot be done using a telnet or other remote connection.
The initial output of the boot process is shown below.
Entry Point = 0x00002120
loaded at: 00002120 0000D370
relocated to: 00300020 0030B270
board data at: 003052C8 0030537C
relocated to: 002FF120 002FF1D4
zimage at: 00008100 0006827E
relocated to: 00DB7000 00E1717E
initrd at: 0006827E 0024F814
relocated to: 00E18000 00FFF596
avail ram: 0030B270 00E18000
Linux/PPC load: root=/dev/ram
After printing “Linux/PPC load: root=/dev/ram”, the Cyclades-TS waits approximately 10 seconds for user input.
This is where the user should type “<sp>single” (spacebar, then the word “single”). When the boot process is
complete, the Linux prompt will appear on the console:
[root@(none) /]#