User manual

CRU
User Manual for RAX QJ and RAX QJp (A9-210-0010) REV 1.0
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5. Frequently Asked Questions (FAQ)
Q: When I change a drive to write protect mode in my RAX QJp, I can still copy a file to the hard drive. Is
the file there?
A: No. The operating system will show the file on the drive, but when you cycle power on RAX QJp you
will see that the file is not actually there.
Q: Can I daisy-chain both bays together so I can connect to the computer with a single FireWire cable?
A: Yes. But for best performance, don’t connect other FireWire drives at the same time (unless they’re
provided a different data channel).
Q: Can I hot-swap drives with this product?
A: RAX QJ and RAX QJp support hot-swapping over USB or FireWire connections. If the eSATA/SATA
host supports this feature, the drives can be hot-swapped via eSATA. All eSATA host cards currently sold
by CRU support hot swapping. Third-party host cards may or may not support this feature. Motherboard
SATA connections often do not support hot swapping, so a discreet host card is recommended.
Q: Will this product work with hard drives larger than 2.2TB?
A: Yes, assuming the rest of your configuration (e.g. OS, BIOS, host drivers) supports large volumes,
this product is compatible with drives larger than 2.2TB.
Q: When I connect both bays of my RAX to my computer via FireWire, only one or none mount. Why?
A: FireWire devices have what's called a chip ID. The chip ID is a unique identifier for FireWire devices
and is used by the computer to send commands to a particular device on a FireWire bus. If, however, two
devices share a chip ID the computer cannot communicate with one, or sometimes both, devices.
The easiest way to fix this is to use the WiebeTech Configurator to change the chip ID on one of the
FireWire bridges. You can download the Configurator here
.
Q: Why does my eSATA device appear as a Parallel SCSI device in System Profiler?
A: The "Serial ATA" tab in System Profile shows devices attached to the internal SATA bus, but not
always devices attached to an eSATA host card. Sometimes these devices will appear under the heading
"Parallel SCSI" instead. This is entirely normal and does not indicate a problem with the device or its
drivers.
Q: I've attached my RAX and can see the volume, but it shows up twice. Which one is real?
A: If you are seeing your RAX volume mounted twice, chances are the unit is connected to the computer
using both the eSATA and FireWire connections. When this is the case, the OS may attempt to mount
RAX twice resulting in two volumes appearing. Simply turn off RAX and unplug one of the connections to
resolve the problem.
For more FAQs and additional information, please visit www.cru-dataport.com
or www.wiebetech.com.
WiebeTech is a brand of CRU.