If the recovery timer cannot talk with the operating system before reaching 0, it initiates a recovery action, ranging from "do nothing" to "reboot the system automatically.
This proactive approach could yield higher availability. Remote console redirection. This capability allows administrators to perform many maintenance functions from the remote console, resulting in potentially higher application availability and administrator productivity.
DRAC III offers faster graphic console redirection and simplifies keyboard functions, such as control-alt-del, making them easier to use. Remote floppy boot. DRAC offers remote media access, allowing the server to boot from remote media. Administrators can insert a bootable DOS diskette into the diskette drive of the desktop machine and boot a remote server to that floppy. Functions on the "diskette" are executed in a DOS environment for bit systems. Figure 5. Operating system down console access.
DRAC can enable a remote session when the operating system is down. Ethernet access. Optional wall adapter. This adapter provides a backup power source and plugs into a separate power grid or uninterruptible power supply UPS to gain server access, even when the server power grid is not available.
Battery backup. This capability provides 30 minutes of server access when all external power sources are non-functional. Last screen capture.
DRAC uses the watchdog timer to talk to the system. When the system is hung or not responding, DRAC begins taking screen shots. When the system stops responding for a user-specified number of seconds, the system is determined to be hung and the last data on the screen is captured for review by the administrator. The information on the system console—the screen capture—can help the administrator to understand what might have been happening at the time of the failure.
These capabilities allow administrators to manage servers more quickly and to address minor issues proactively before they multiply, thereby increasing productivity and system availability. Prior to joining Dell, Donnie was employed by IBM for 16 years in technical marketing support and technical education.
He has a B. Lance has an M. Prior to joining Dell, Jon was employed by Tandem Computers and specialized in remote management of fault-tolerant computers. Copyright Dell Inc.
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