Connecting; Connection Recommendations And Additional Remarks - Fujitsu ETERNUS LT40 S2 Installing, Starting Up And Maintaining

Chapter 2 Installing the Tape Library

2.6 Connecting

2.6 Connecting
2.6.1

Connection Recommendations and Additional Remarks

The effectively achievable data throughput of tape drives depends on a multiplicity of factors. These primarily
are:
• Specified data throughput on the system bus (e.g. the PCI bus)
• Number of host bus adapters (controllers) on the system bus
• Origin of data to be stored (e.g. RAID system, single hard disk drives)
• Transmission type and speed of the data to be stored (e.g. Ethernet)
• Number of devices at the host bus adapter (controller)
• Sequential or parallel operation of the tape drives
• Compressed or uncompressed operation of the tape drives
2.6.1.1 FC
FC allows for an active intelligent interconnection scheme, called a Fabric, to connect devices. Everything
between the ports on FC is called the Fabric. The Fabric is most often a switch or series of switches that takes
the responsibility for routing.
2.6.1.2 SAS
■
SAS features
• Serial data transfer to and from storage devices as disk and tape drives
• 4 SAS channels per SAS HBA port (typical, not mandatory) for a maximum of 4 storage devices per HBA
port
• Unique identifying of a SAS drive by its WWN (World Wide Name) or WWID (World Wide Identifier)
■ Host Bus Adapter
The HBA has to meet following requirements:
• External SAS connector
• Multiple LUN support (most SAS RAID controllers do not support multiple LUNs). Consult your sales
representative or a certified service engineer for compatibility of HBA, library and your server.
■ SAS Cable
• The SAS signal cable supplied with the ETERNUS LT40 S2 has at its drive side 2 connectors for connecting a
maximum of 2 SAS drives. Connect the plug marked "P1a" to the lower drive. Connect the plug marked
"P1b" to the upper drive, if installed.
FUJITSU Storage ETERNUS LT40 S2/LT60 S2 LTO Library Installing, Starting Up and Maintaining
32
Copyright 2018 FUJITSU LIMITED P3AM-5392-07ENZ0