Advantech DNS-3200 - Manual (Page 60)

DNS-3200 User’s Manual 42
a rescan of all channels after disconnecting a disk, the state of every array
using the missing disk changes from NORMAL to either the CRITICAL
or OFFLINE, depending on the array type.
Disk States
Within the management applications, a disk can be part of one or more
arrays and can exist in one of three states: NORMAL, FAILED, or
UNKNOWN. In RAIDConsole, these states are displayed in the Disk
List area in a column named State. Within the bcadm program, these
states are also displayed in a column named State. The states are defined
as follows:
• NORMAL The NORMAL state is displayed when the disk is con-
nected, functioning correctly, and the controller can communicate with
it.
• FAILED The FAILED state is displayed when the controller can rec-
ognize the disk, but cannot read or write to it.
• UNKNOWN The UNKNOWN state is displayed when the disk is new
and has not been initialized, or is in a format unrecognizable by the
controller.
If a disk fails, its state in the Disk List is displayed as FAILED. However,
if the system tries to communicate with a disk that has been physically
disconnected, the disk shows as FAILED in the Array List window but
still appears in the Disk List as NORMAL until a rescan is performed.
After you have rescanned the SATA channels for information, the discon-
nected disk disappears from the Disk List.