Cisco Headend System Release 2.5 安装指南
Activate the Old System Release
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Activate the Old System Release
Restoring the Old System Release
Follow this procedure to restore the system software that was in place prior to the
unsuccessful upgrade to SR i4.2.2.
1 Write down the version of the system release are you trying to restore.
unsuccessful upgrade to SR i4.2.2.
1 Write down the version of the system release are you trying to restore.
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2 If necessary, follow the procedures in Appendix A, Stopping System
Components, to stop the system components.
3 From a root xterm window, type eeprom boot-device=disk:a and then press
Enter. The system resets the default boot device to the original disk.
4 Type /usr/sbin/shutdown -y -g0 -i6 and then press Enter. The system reboots
and activates the old software.
Important: Do not use the reboot or halt command to reboot the server.
Important: Do not use the reboot or halt command to reboot the server.
5 Did the DNCS reboot without error?
If yes, skip to step 9.
If no, go to step 6.
6 The system may have displayed an error message similar to /var is busy, or The
allowable number of mount points has been exceeded. Follow these
instructions.
Note: This is a known issue that occurs randomly during an upgrade.
a Log on to the system as root user.
b Type df -k and then press Enter. The system displays the mounted
instructions.
Note: This is a known issue that occurs randomly during an upgrade.
a Log on to the system as root user.
b Type df -k and then press Enter. The system displays the mounted
filesystems.
7 Is the /var filesystem present in the output from step 6?
If yes, go to step 8.
If no (the /var filesystem is not present), go to step 10.
8 Follow these instructions if the /var filesystem was present in the output from
step 6.
a Press the Ctrl and d keys simultaneously. The system boots into multi-user
a Press the Ctrl and d keys simultaneously. The system boots into multi-user
mode and the Login window opens.
b Go to step 11.