Qubex User Guide
Page 22
Appendix A
Troubleshooting
Q. I have created a 2.5 TB LUN and my Operating System does not recognize the full
capacity.
A. Ensure that your Operating System supports volumes sizes greater than 2 TB. This is
achieved by using 16 bit SCSI Command Descriptor Blocks. If the Operating System does
not support this (versions of Windows prior to WIN2K3 Service Pack 1) then you have the
ability to use 4K block sizes rather than 512 bytes to overcome this limitation. Note that
dynamic disk support is not available when using non standard block sizes.
These options are presented to the user when volumes greater than 2TB are initially
configured.
Q. My Operating system does not recognize the newly created volume.
A. Verify that the HBA drives are correctly loaded, if the HBA supports BIOS recognition,
check to see if the volume is recognized at the BIOS level. Ensure that the volume is
correctly mapped to the appropriate host channel (refer to configuration guide).
Q. My Fibre Channel Qubex system is not operating correctly at 4 gigabit speeds.
A. An issue has been found during testing of the Qubex where if the Qubex is in Auto
Negotiate mode it may not be able to synchronize to a 4Gb HBA that is also using Auto
Negotiate. This is due to an incompatibility between various manufacturers’ methods of
implementing 4Gb Auto Negotiation. The solution to this issue is to hard set the Qubex for
4Gb operation and Loop Topology. Refer to the configuration guide for information on
setting the FC host speed.
