Bosch Appliances DVAS instruction manual Cache Settings, System Administration

DVAS Instruction Manual System Menu EN 34

Available Information:

Information	Description
Current ADMIN /	Displays whether security is enabled.
USER Login Password
Requirement
Change ADMIN /	Use the radio buttons to select the
USER Login Password	security mode for either ADMIN or
Requirement to	USER.
Login User Name is	Both USER and ADMIN user names are
Fixed to	fixed (cannot be altered).
Password	Type the new password in the text box.
Write	Number of host writes.
Confirm Password

When the new USER / ADMIN settings have been entered, press the relevant Set ____ Password button.

Only alter one user at a time.

9.7Cache Settings

DVAS Series disk array has a write cache memory, which is normally enabled. The cache memory holds data being written to disk, enabling the controller to confirm that a command is complete before data is physically written. A battery backup protects cached data for up to three days in the event of a power failure during an unfinished write operation. The DVAS Series disk array controller automatically completes any unfinished write operations once power has been restored, provided the cached data is available.

Figure 44 Cache Configuration

Current Write Cache State

Shows how cache is currently being used.

Manually Override Current Write Cache Status Check this box to force the cache on or off without rebooting.

Desired Write Cache State

Use these radio buttons to select the preferred write cache state; Enabled or Disabled.

Allow SCSI Host to Override Write Cache Configuration

Some SCSI commands force write cache not to be used. Check the box to override this.

Once the required changes have been made, click Save Settings to continue.

9.8System Administration

The ADMIN tab allows muting and resounding of the audible alarm when there is a problem, and clearing events that require manual responses from the problem page.

Figure 45 System Administration

•Silence the Audible Alarm

Click this button to silence the audible alarm. If this does not solve the problem that caused the alarm to sound, click the red X at the top right of the window to examine the Problems page.

•Re-sound the Audible Alarm

Click this button to restart the alarm if there is a fault present.

•Acknowledge Lost Data Warning

When the RAID controller cannot reconstruct array data due to lack of access to the redundant data (two or more blocks not accessible, or two disks failed), the following warning displays: The RAID controller has found some unrecoverable data blocks. To clear this warning, click Acknowledge Lost Data Warning. For information regarding bad blocks, click Bad Blocks.

Bosch Security Systems 20 January 2004