Western Digital WD20000H2Q-00 User Manual - Page 8

MY BOOK MIRROR EDITION USER MANUAL 3 About Your WD Drive Format and Configuration This WD device is preformatted as a single Windows NTFS* partition and is pre-configured for RAID 1 (Mirrored) mode for extra data protection with instantaneous and automatic data updates. If one drive fails, the dual-drive storage system will still operate and your data will be preserved. You can replace the failed drive and rebuild the dual-drive storage system. This product also supports RAID 0 (Striped) mode for maximum capacity and accelerated performance. For more information on this product including instructions on changing the RAID configuration or drive format, see "WD RAID Manager for Windows" on page 13 or "WD RAID Manager for Mac" on page 17. * To use this device with a Macintosh computer, you must reformat it to HFS+ (Journaled) or FAT32. See "WD RAID Manager for Mac" on page 17 for instructions. LED Indicators (Lights) The Power/Activity and capacity gauge indicators are represented by a single bar of four LEDs (lights) on the front panel of the device. Power/Activity LED Behavior Appearance Drive State Steady Power-on state or power-save mode Slow flashing (every four seconds) System standby Moving up and down Drive in use Alternating checkerboard pattern Transitioning from one state to another Alternate flashing between top and bottom LEDs RAID degraded mode Cycling from bottom to top RAID rebuild mode Fast flashing (every second) Over-temperature condition* * If this condition occurs, read/write activity will stop and the drive will spin down. Disconnect and power down My Book. Allow it to cool down for 1-2 hours then reconnect and power up the device. Capacity Gauge When the device is turned on, the capacity gauge indicates space used on the drive by illuminating up to four sections in an upward vertical direction. Each section represents approximately 25 percent of drive capacity. Because this drive is preformatted, the first section is illuminated upon installation. The capacity gauge is enabled only through installation of WD Drive Manager, which must be installed on each system to which the device is connected. The capacity gauge is updated automatically as the drive is used. ABOUT YOUR WD DRIVE - 5