NOTE: You cannot change the Loop ID if the Topology is set to Point to Point. If you change a default loop ID, make sure each Fibre Channel tape drive with a topology setting of Auto (LN), Loop (L), or Auto (NL) has a unique loop ID.
Tape drives have unique parameters that can be configured. This topic provides information on each parameter. For instructions on how to modify parameters, see Setting Tape Drive Parameters.
You can modify the SCSI ID for a SCSI tape drive. Each device on a SCSI bus, including the host bus adapter (HBA), needs to have a unique SCSI ID. Changing the SCSI ID is necessary when there is a duplicate ID on a single bus. Typically, the HBA SCSI ID is set to 7. For example, if two tape drives are connected together on the same bus, each tape drive must have a different SCSI ID and it must be different from the HBA's SCSI ID.
A SCSI ID is limited to a value between 0 and 15. By default, the library assigns the following SCSI IDs to SCSI tape drives installed in the following modules:
You can modify the following settings for Fibre Channel tape drives:
DPF (Data Path Failover) — You can enable data path failover on LTO-5 and higher Fibre Channel tape drives with a Storage Networking license by making a selection in the Data Path list (see About Data Path Failover).
Loop ID — Loop topologies require loop IDs. Loop IDs can be set to a value between 0 and 125. A unique loop ID is selected by default for all Fibre Channel tape drives installed in the library. For example, the tape drive installed in the top drive bay of a 5U control module is assigned a default loop ID of 61. The tape drive installed in the 5U control module 's bottom drive bay is assigned a default loop ID of 63.
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NOTE: You cannot change the Loop ID if the Topology is set to Point to Point. If you change a default loop ID, make sure each Fibre Channel tape drive with a topology setting of Auto (LN), Loop (L), or Auto (NL) has a unique loop ID. |
Topology — The topology connection mode can be set to one of the following:
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NOTES on Point to Point: |
Speed — The interface speed can be set to one of the following, depending on tape drive type:
If the topology and interface speed settings that you select are not supported, the next appropriate settings are applied. The requested settings are displayed on the Setup - Drive Settings screen in the Requested column and the negotiated settings are displayed in the Actual column.
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CAUTION: LTO-5 and higher Fibre Channel tape drives can be configured for speeds of up to 8 Gb/s. If they are configured for 8 Gb/s, you should connect them directly to a host and not to an FC I/O blade, because the FC I/O blade only allows speeds up to 4 Gb/s. If you connect an LTO-5 or higher Fibre Channel tape drive to an FC I/O blade, the speed will autonegotiate to 4 Gb/s. |
You can view but not set parameters for SAS tape drives. A SAS tape drive’s SAS address is automatically and uniquely generated based on a unique World Wide Node Name (WWNN) that the drive receives when it is configured.
See also: