Accusys ExaRAID GUI - Manual (Page 250)

Troubleshooting
6-7
causing corrupted logical disks, you may try to use array recovery utility to
the RAID configurations (see 2.7.13 Array recovery on page 2-53).
6. Ensure proper power on/off sequence of RAID and JBOD
You have to make sure the expansion chassis has been ready before
powering on the RAID system, such that the RAID system can properly
recognize the expansion chassis and the hard disks. And shut down the
RAID system first and then its expansion chassis, such that the RAID
systems won’t see the lost of expansion chassis as a failure event.
7. AAMUX boards are required for attaching SATA drives to SAS
systems
An AAMUX board is required SATA hard disks installed in SAS JBOD systems
and for redundant-controller systems. AAMUX provides dual paths for
controllers to access single-ported SATA drives. Check your RAID system
hardware manual for more details, and contact your RAID system
supplier to get the AAMUX boards.
8. Regular maintenance helps to avoid disaster
To avoid performance degradation or data loss caused by failed hard
disks, it’s advised to enable periodical SMART checking, automatic disk
cloning, and periodical disk scrubbing. Please also set up spare disks for
such that disk rebuilding can be started right away when any hard disks
fail.
6.5 User Interfaces
1. The Web GUI cannot be connected
You can use the Web GUI and other network-related management
features (including the host-side management software) only when the
management network interface is configured properly. Please check if
the LED indicators of the Ethernet port are lit up properly (refer to the
hardware manual for details), and the IP address has to be set to enable
the network interface. You can manually set the IP address by the LCD or
local CLI, or use a DHCP server on the network.
2. Some user operations are prohibited
Each user operation can be executed assuming some sort of conditions,
please check Chapter 2 to find out the restrictions of your operations. The
web GUI will also offer information and suggestions when a user operation
cannot be done. A few common guidelines and examples are as below:
• To avoid mistakenly destroying data, a disk group cannot be
deleted when it contain logical disks.
• To avoid overloading, disk scrubbing is not allowed for a degraded
disk group, or an initializing disk group.