Dell PowerVault MD3000 - Manual (Page 6)

6
Information Update
Virtual Disk Copy Operation on SATA Disks
A virtual disk copy operation may take much longer when a new copy is
created on SATA disks. To improve the performance, first create the virtual
disk. After the virtual disk is initialized, start the virtual disk copy operation.
Load Balancing in Microsoft Windows Server
2008
Load balancing in Microsoft
®
Windows Server
®
2008 is provided by the
MPIO driver under the MPIO tab. For information about accessing the
MPIO tab, see the
Installation Guide at support.dell.com/manuals. The
following options are supported by MD3000:
• Least Path Weight
• Least Queue Depth
Installing Linux Operating System
During a Linux operating system installation, the installer lists all the
volumes that are discovered from MD3000, including virtual disks that are
mapped to the host and Universal Xport. If the operating system needs to be
installed on an MD3000 virtual disk, you must ensure that you select the
appropriate virtual disk. The array does not respond if you select the Universal
Xport disk(s) for installation.
Battery Learn Cycle
In second generation firmware systems, the cache offload battery undergoes a
learn cycle once in every 13 weeks to ensure that the battery is in a good state.
The learn cycle performs a complete discharge of the battery followed by a
complete recharge. During this cycle, the system cache is disabled on all
virtual disks in the system. There may be a temporary impact on the
performance of the system when the battery undergoes a learn cycle. A learn
cycle takes place under the following situations:
• First time upgrade from first generation firmware to second generation
firmware
• Once in every 13 weeks