By using the built-in data-compression capability of the tape drive, greater data rates than the native data transfer rate can be achieved. However, the actual throughput is a function of many components, such as the host system processor, disk data rate, block size, data compression ratio, SCSI bus capabilities, and system or application software. 

For more information about LTO-8 tape drives, see “IBM LTO Ultrium 8 tape drives” on page 80. 

## 9.3.2 Path failover 

The TS3100 supports Path Failover feature. Path Failover is a combination of two previous features: Control Path Failover and Data Path Failover. 

The device driver Path Failover support configures multiple physical control paths to the same logical library within the device driver and provides automatic failover to an alternate control path when a permanent error occurs on one path. This function is not apparent to the running application. 

## 9.3.3 Encryption 

The IBM TS3100 tape library supports data encryption with LTO-8 tape drives. The following modes of encryption are supported: 

GLYPH<SM590000> System Managed (available for AIX, Linux, Solaris, and Microsoft Windows) 

GLYPH<SM590000> Library Managed (available for OS/400, i5/OS, AIX, Linux, HP-UX, Solaris, and Microsoft Windows) 

GLYPH<SM590000> Application Managed (IBM Spectrum Protect) 

For LTO Ultrium 8, the Transparent LTO encryption feature is required for enabling encryption. The IBM Security Key Lifecycle Manager is required for enabling System Managed and Library Managed encryption. 

The installation of an Ultrium 8 tape drive with encryption might require code updates for IBM Power Systems, and supported open systems devices drivers or storage management software. An update of the open systems device drivers can be obtained from the Fix Central download portal at this website: 

http://www.ibm.com/support/fixcentral 

For more information about Encryption, see 2.2, “Tape encryption overview” on page 68. 

## 9.3.4 IBM Spectrum Archive and LTFS 

The TS3100 supports IBM Spectrum Archive Library Edition (LE) and the associated Linear Tape File System (LTFS). 

IBM Spectrum Archive provides software to manage, monitor, archive, and restore files. LTFS is the first file system that works with the multiple partitioning that is available on Ultrium 8, 7, 6, and 5 tape drives. This feature brings a new level of use and portability to open systems tape storage. 

This storage software helps to reduce complexity in data management and access time through the enablement of a self-describing tape that includes a simple file index. LTFS allows files and directories to be shown on the desktop, directory listing, and to drag-and-drop file to and from tape. It also supports data exchange and has a simple one-time installation. 

