Accusys ExaRAID GUI - Manual (Page 251)

Troubleshooting
6-8
• To avoid confusing operations, some settings cannot be modified
when a related state happens. For example, rebuilding-related
settings cannot be modified when there is rebuilding disk.
3. The web GUI does not show updated information
The web browser displays the cached the web pages such that you
cannot see the updated web pages. For example, the percentage of
firmware upload progress isn’t updated. Please go to the setting page of
your web browser to delete the temporary files, cookies, and the history.
4. It takes very long time for the web GUI to respond my
commands
The web GUI is presented by browser but its contents are generated by
the storage processor, which need also process I/O request as well as
other maintenance tasks. You might experience slow GUI when the I/O
access is very heavy. Please reduce the workload or stop some
background tasks.
Bad hard disks or bad blocks could cause long response time of web GUI,
because some system information is retrieved from or written to hard
disks. When it takes a long time for hard disks to complete an I/O request,
the web GUI would freeze to wait for the I/O completion. Please use hard
disk diagnostics utilities to identify the problematic hard disks and remove
them.
5. Some pages in the System Management menu are not
viewable
The RAID controller offers two levels of administration access right. If you
login as a user (username: user), you are restricted to read-only web GUI
pages. Login as administrator (username: admin) allows full-function
management and access to all pages.
6. No display or response on the LCD
If your RAID system is capable of redundant-controller configuration, the
LCD can be managed by only one of the two controllers at a time, and
you need to use LCD hot keys (see 3.2.5 Hotkeys on page 3-5) to choose
a controller to control the LCD.
6.6 RAID Configuration and Maintenance
1. 2TB limitation and how to choose sector size
Because of 32-bit logical block addressing (2^32 x 512 bytes = 2TB) used
by the MBR-based partition table and by the host operating systems, like
Windows 2000, Windows XP 32-bit, and Linux 2.4.x kernel, the maximum
size of single partition or logical drive is limited to 2TB size. You can use
logical volume management (LVM) software to aggregate multiple LUNs.