Shell Utility for UnixWare
5-18
Disk Array Controller Software Kit User’s Manual
when the shell first appears. The currently selected controller is displayed at
the upper right corner of the screen.
Use the arrow keys to highlight any menu item, press the F1 function key for
help, or press the Enter key to select a highlighted item.
The shell menu items and their subsequent screens are described below.
Select MDAC. Select this item, and a popup window appears on the screen
showing all of the controllers currently attached to the host system. The
controllers are shown in a horizontal bar in the middle of the window.
Use the arrow keys to highlight any Mylex Disk Array Controller and press
Enter to select it. The rectangle at the upper right corner of the screen will
reflect the controller that is currently selected.
The system will display the menu screen. A window with a title bar and a
menu bar above it appears on the screen. The title bar indicates the name of
the utility. The menu bar includes all of the menu items currently being
supported by the shell. The left most item, Select MDAC, is highlighted
when the shell first appears. The currently selected controller is displayed at
the upper right corner of the screen.
Use the arrow keys to highlight any menu item or press the Enter key to
select a highlighted item.
Rebuild. Rebuild is a process whereby data on a failed SCSI drive is
regenerated for all dependent critical system drives and written onto a
replacement drive. A rebuild operation is only possible if a failed drive was
part of a Drive Group (physical pack) that was configured to provide data
redundancy (RAID 1, 3, 5, or 0+1).
There are two types of rebuilds for the controller, a standby rebuild and a
manual rebuild. A standby rebuild happens automatically when a SCSI drive
fails and an identical SCSI drive is available as a standby (hot-spare) drive. A
manual rebuild is usually invoked manually (thus the name) by a system
administrator when a SCSI disk drive has failed and no standby drive is
available. The system administrator performs a manual rebuild on a new
SCSI drive that is replacing the failed one. This discussion will focus only on
the manual rebuild.
Select Rebuild from the menu bar, and the center of the screen shows the
status of all drives on all channels. The symbols ONL, DED, WOL, RDY,
SBY, and ---- are used to indicate on-line drives, dead drives, write only
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