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NOTE:
There are practical limitations on the number of devices that each host and FC switch or
HBA can access. It is possible to configure more drive and library devices than a host can access.
The limit for Windows or Linux hosts using the iSCSI interface is 64. Although the Fibre Channel
connection supports a greater theoretical number of devices per FC port on a host or switch, it is
recommended that no more than 64 devices are configured for use by a single host.
Performance
Your HP StoreOnce Backup system is designed for high performance backup and restore operations
according to the specification documented. However, it requires careful configuration. Please refer
to the StoreOnce Best Practices for VTL, NAS and Replication implementations document on the
HP Manuals page for detailed guidance.
There are many reasons why you may not see the performance you expected from your HP
StoreOnce Backup system.
Your own network speed or disk access is not fast enough to allow streaming of data.
Your backup application is not optimized.
Your HP Backup system is not optimized for your network and application.
Network
For iSCSI devices the HP StoreOnce Backup system is designed to be run on a 1Gb or 10Gb (HP
StoreOnce 44xx Series) network. Performance will be reduced if a 100BaseT network is used. The
LEDs on the front panel (1–Gb ports only) and on the network ports and also warnings on the Web
Management Interface will indicate the network speeds at which the device is operating.
Using the 10Gb ports (HP StoreOnce B44xx only)
If data transfer seems slow:
Check that the 10Gb ports are configured.
Also, make sure that the media servers and PCs are configured correctly to select the 10GbE
network for data transfer.
The LEDs on the 10GbE card (at the rear of the HP StoreOnce Backup system) also help identify
network activity. Or use iLO2 to monitor the network ports.
Power off and power on
There are no commands within the GUI to control the power on/off or reboot the appliance. All
the commands should be run from the StoreOnce CLI.
Powering up servers
Power up the server using the power on button on the server to trigger a cold boot and automatically
power up.
Power off
system shutdown: This gracefully shuts down the appliance by shutting down all services before
powering down the server. This means when you power back up, the deduplication stores will
start up from a clean state. The server will be in the off state, and will require powering on via the
power button or StoreOnce CLI.
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Troubleshooting
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