12.4.1 Library Controller 12.4.2 Tape drives TS4300 tape library Ultrium 8 models 320  IBM Tape Library Guide for Open Systems The Library Controller manages the entire library, including the operator panel and accessor.  It is responsible for running system tests to ensure that the library functions properly. The  Library Controller stores vital product data (VPD), such as library settings and the library  serial number.  The Library Controller indicates status with three vertically positioned LEDs. The color of the  LED identifies the area of the component that is reported. They are, from top to bottom, as  follows: The TS4300 library supports Half-High SAS and Fibre Channel, and Fibre Channel Full-High,  Ultrium 8, 7, and 6 drives. Ultrium 5 and earlier drives are not supported in the TS4300. Tape  drives are hot-addable, which mean the library power remains on and operations of the  existing tape drives are still active. Drives can be removed and installed without tools. The  drive sleds are customer-replaceable units (CRU). Drives are mounted in sleds that are installed into tape drive slots in the rear of the library. If a  tape drive slot is empty, a metal plate covers the empty drive slots to prevent any debris from  entering the library. Important:  If you install Full-High Fibre Channel drives in the TS4300, they must be in the  lowest drive position. In this case, another Half-High drive can be installed above it, if  wanted.  The following models are available for the TS3200 tape library: GLYPH<SM590000> Green: Ready LED. Library in Ready Status and operating properly GLYPH<SM590000> Amber: Error LED. Library in Error Status and the controller has a hardware issue  GLYPH<SM590000> Blue: Unit ID LED. The UID LEDs are controlled by the user through the maintenance  panel. The UIDs are helpful for locating components of the library in a Data Center GLYPH<SM590000> The 3555-L3A feature AGKP specifies an IBM Ultrium 8 Full-High Fibre Channel tape  drive. The Ultrium 8 Fibre Channel drive has an 8 Gbps Fibre Channel interface that can  be connected to Fibre Channel host adapters. The Ultrium 8 tape drive has a native data  transfer rate of 360 MBps. GLYPH<SM590000> The 3555-L3A feature AGKN specifies an IBM Ultrium 8 Half-High tape drive that has an  SAS interface and a native data transfer rate of up to 6 Gbps. The SAS Ultrium 8 tape  drive comes with dual-port Mini-SAS (SFF-8088) interfaces. The Ultrium 8 tape drive  provides a sustained native data transfer rate of 300 MBps. GLYPH<SM590000> The 3555-L3A feature AGKM specifies an IBM Ultrium 8 Half-High Fibre Channel tape  drive. The Ultrium 8 Fibre Channel drive has an 8 Gbps Fibre Channel interface that can  be connected to Fibre Channel host adapters. The Ultrium 8 tape drive has a native data  transfer rate of 300 MBps.