## 12.4.1 Library Controller 

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: 

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 

## 12.4.2 Tape drives 

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. 

## TS4300 tape library Ultrium 8 models 

The following models are available for the TS3200 tape library: 

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. 

