Virtual TapeServer 6.03.41 Installation Guide

Cabling and Connecting VTS | 21
Here is an illustration of the HVD and LVD ports on the back of the SCSI converter:
Note If you replace one or both of the SCSI cards with the 2Gb FC card(s), as described in
SCSI-to-Fibre Channel Adapter Upgrade on page 119, and you set any of the FC ports
to target mode (to connect the port to a virtual device), bus numbering will change.
After you replace the SCSI card(s) and reboot VTS, refer to the Manage system limits
page in the VTS web interface to see how the buses were renumbered. Contact your
VTS service and support representative for help correlating bus numbers to ports on
the back of the VTS server.
Cabling to external disk resources
VTS supports optional connectivity to a wide variety of external SCSI or Fibre Channel (FC)
storage solutions using any port that has not been reserved for a virtual tape drive.
For FC-attached external resources, identify the connector type for the device end. Source FC
cables with LC fiber connector for the VTS end and the necessary connector for the device end.
Define a storage space on the disk array for use with the Linux operating system. Then,
present a logical unit number (LUN) that refers to this storage space. Note that each LUN
should not represent more than 1TB of space.
The MSA 1000 will be configured with the storage and presenting LUNs from the factory. The
cable will be LC-to-LC and connect to one of the FC ports on the router embedded in the MSA
chassis. For additional storage, the MSA is SCSI cabled to the second unit of disks.
Note You must use a Mini SAS cable to attach the MSA 60 to the VTS server. Use an FC
cable to attach the MSA 1000 to the VTS server.
Fibre Channel
The base hardware configuration includes two 4Gb FC ports. If the external storage unit is a
VT5905, VT5905-B, or StorageWorks MSA 1000, use a male LC-to-LC fiber optical cable to
connect the two units. Other storage units might require a different connector.
Note As a best practice, use all 4Gb ports first then, if necessary, connect external storage
to the 2Gb ports if they are installed. The 4Gb ports cannot be used to present virtual
tape devices. The 2Gb ports provide half the performance as the 4Gb ports and can
also be used for presenting virtual tape devices.