20Chapter 1 Overview............................................................................................................ 411. Features of this BBU................................................................................................................... 412. Specification ............................................................................................................................... 413. Installation Flow .......................................................................................................................... 424. Functions of Parts ....................................................................................................................... 435. Notes on Use - Always Follow These Notes -............................................................................. 495-1. Notes on Installation ........................................................................................................... 495-2. Notes on Operation ............................................................................................................. 495.3. Notes on Regular Refresh ................................................................................................... 505-4. Notes on Refresh ................................................................................................................ 50Chapter 2 Installing the BBU .............................................................................................. 511. Installation Procedure ................................................................................................................. 511-1. Putting Setup Date Label .................................................................................................... 511-2. Connect the Battery Backup Unit ........................................................................................ 522. Checking by Universal RAID Utility............................................................................................. 532-1. Procedure for RAID Viewer (Windows Only) ...................................................................... 532-2. Procedure for raidcmd......................................................................................................... 55Chapter 3 Operation and Maintenance .............................................................................. 571. Maintenance Service .................................................................................................................. 572. Preventive Maintenance ............................................................................................................. 572-1. Preventive Maintenance of BBU ......................................................................................... 572-2. Life of Battery Pack ............................................................................................................. 573. Battery Pack Replacement Procedure........................................................................................ 58Chapter 4 Refresh .............................................................................................................. 594-1. Refresh .................................................................................................................................... 594-2. Cache Mode when refresh is going on .................................................................................... 594-3. Regular refresh ........................................................................................................................ 60