182 QXS G2 Hardware Installation and Maintenance Guide
3
To determine if any reads or writes occur during interval, subtract the set of numbers you recorded
in
from the numbers you recorded in
• If the resulting difference is zero, then I/O has stopped.
• If the resulting difference is not zero, a host is still reading from or writing to this disk group.
• Continue to stop I/O from hosts, and repeat
until the difference in
is
zero.
NOTE:
See the QXS G2 CLI Reference Guide for additional information. Optionally, you can use the
disk management utility (GUI) to monitor IOPs and MB/s.
Shutting Down a Controller Module
Shutting down the controller in a RAID chassis ensures that a proper failover sequence is used, which
includes stopping all I/O operations and writing any data in write cache to disk.
•
If both controller modules are shut down, hosts cannot access the system’s data.
•
Perform a shut down before you remove a controller module from a chassis, or before you power
off its chassis for maintenance, repair, or a move.
•
Use the disk management utility (GUI) or the CLI to perform a shutdown.
Using the Disk Management Utility (GUI)
1
Sign-in to the disk management utility (GUI).
2
In the System panel in the banner, select
Restart System
.
The Controller Restart and Shut Down panel opens.
3
Select the
Shut Down
operation, which automatically selects the controller type Storage.
4
Select the controller module to shut down: A, B, or both.
5
Select
OK
. A confirmation panel appears.
6
Select
Yes
to continue; otherwise, select No. If you selected
Yes
, a message describes shutdown
activity.
NOTE:
If an iSCSI port is connected to a Microsoft Windows host, the following event is
recorded in the Windows event log:
Initiator failed to connect to the target
.
NOTE:
See the
QXS G2 Disk Management Utility User Guide
for additional information.
Using the CLI
1
Log-in to the CLI.
2
In your dual-controller system, verify that the partner controller is online by running the
command;
show controllers
3
Shut down the failed controller—A or B—by running the command:
shutdown a
or
shutdown b
Summary of Contents for QXS G2 Series
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