Verifying Usb Installation For Optimum Performance; Check For Usb 2.0 Port (Windows); Ensure That The Tape Drive Is The Only Device On A Usb Hub (Windows) - Freecom USB DAT-40ES User Manual

Has the drive been moved recently? Have any cables been disconnected and reconnected? Has the
environment changed—unusually hot, cold, damp or dry? Has there been dust or dirt near the drive.
Have reasonable precautions against static been taken?
The problem could lie with the drive:
1.
Check the cables and connectors.
2. Clean the tape heads with the cleaning cartridge.
3.
If the problem persists, check the environmental conditions against the specified limits (refer to
http://www.hp.com). Perhaps move the drive to a more suitable site.
Has a new operating system been installed in the host computer? Has new backup software been
installed?
The problem could lie with the host or the software. Consult the computer's operating manuals, the
software manual, or seek help from a service engineer.

Verifying USB installation for optimum performance

To confirm that an HP StorageWorks USB DAT drive is installed correctly:
• Check that a USB 2.0 port is being used
• Ensure that the tape drive is the only device on a USB hub
• Ensure that the hp_usbstor driver is being used

Check for USB 2.0 port (Windows)

It is important to ensure that you connect your drive to a USB 2.0 port. The drive will work on a USB 1.1
port but performance will be severely degraded.
To check the port on a Windows system:
1.
Go to Device Manager and select Devices by connection from the View menu.
2.
Expand Universal Serial Bus controllers and locate the tape drive.
3.
If a USB driver is listed as Enhanced, the port is USB 2.0. See

Ensure that the tape drive is the only device on a USB hub (Windows)

On some computers multiple physical USB 2.0 ports will be connected to the same master port, known
as a "root hub". Connecting multiple devices to one root hub may degrade tape drive performance
degradation.
USB Mass Storage devices like HP DAT tape drives have the lowest priority of all device types on the USB
bus, so devices such as webcams should never be connected to the same root hub.
To check the devices connected to a root hub:
1. Go to Device Manager and select Devices by connection from the View menu.
2. Expand Universal Serial Bus controllers and locate the tape drive.
3.
Trace the tree of devices back to the USB Root Hub and check that the only device connected is the
tape drive via the HP USB Mass Storage Device. See
a single tape device connected to a dedicated USB 2.0 root hub.
52
Troubleshooting
Figure 22 on page 53.
Figure 22 on page 53 for an example showing