SANRAD V-Switch manual Automatic Safe Mode, 190

Safe Mode

The V-Switch operating status includes the ability to enter into safe mode in the event of booting problems or in an attempt to clear significant amounts of a V-Switch configuration. There are two ways to enter safe mode:

Automatically during a reboot.

Manually via CLI.

There are four safe mode reboot options:

Level 0: Reboot in normal mode.

Level 1: Reboot with last good configuration.

Level 2: Reboot with default factory database.

Level 3: Reboot with default factory system.

Save the V-Switch configurations to the database as the last good configuration by reboot after major configurations.

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

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

190 SANRAD V-Switch User Manual