SANRAD I3.1.1205 - Manual (Page 210)

10-24 SANRAD V-Switch CLI User Manual
Automatic Safe Mode
When the V-Switch reboots, either after upgrading the V-Switch software or
any other time that environmental irregularities require, there may be database
corruption. To prevent potential damage to the database, the V-Switch enters
safe mode.
Safe mode can only be navigated from a console with a local, direct RS232
connection to the V-Switch.
When a V-Switch has boot problems and enters safe mode, its LCD panel
displays:
Init Problem
Safe Mode
Level 0: Reboot in Normal Mode
If the V-Switch is rebooted during initialization it will reboot in safe mode 0.
This gives the V-Switch another opportunity to try to reboot normally in the
event that there are in fact no problems with the database.
Level 1: Reboot with Last Good Configuration
Save the V-Switch
configurations to the
database as the last
good configuration by
reboot after major
configurations.
Each time the V-Switch successfully boots up, it saves the database as the
last good configuration. If the last time the V-Switch booted was also the
first time the V-Switch booted, the database will be empty. All V-Switch
configurations will be lost. Therefore, SANRAD strongly urges you to
reboot the V-Switch after major configurations to save the configuration
database in the event of rebooting problems in the future.
Rebooting with the last good configuration may cause data corruption. For
example, the last good configuration may contain a striped volume composed
of two children. Since the last good configuration, that striped volume has been
reconfigured to include three children. If the V-Switch reboots with the last
good configuration, all data written on the third child will be lost.
The suspicious database is saved and can then be exported to SANRAD
technical support for examination using the CLI command ft export problem
after initializing the V-Switch.
Level 2: Reboot with Default Factory Database
This does not clear
user login profiles.
This is the recommended option.
This clears the database of all configurations that may have been done, e.g.
IP addresses, subdisks, volumes and targets. The suspicious database is
copied to the directory corrupted database where it can then be exported
to SANRAD technical support for examination using the CLI command ft
export problem
after initializing the V-Switch.