IBM 8835 Installation Guide - Page 32

Installing a hard disk drive The following notes describe the types of hard disk drives that your server supports and other information that you must consider when installing a hard disk drive: v The server supports two 25.4-mm (1-inch), slim, 3.5-inch hard disk drives. SCSI server models come with a hot-swap SCSI backplane. v The SCSI server models support low voltage differential (LVD) hot-swap drives. Each hot-swap drive is in a tray, which has a green activity LED and an amber status LED in the upper-right corner. These LEDs are lit if the drive is active and, in some cases, if the drive fails. Each hot-swap drive has a single-connectorattached (SCA) connector, which is connected directly into the hot-swap SCSI backplane. The backplane is attached to connector J12 on the system board and controls the SCSI IDs for the hot-swap drives. Note: The drive in bay 1 is assigned SCSI ID 0; the drive in bay 2 is assigned SCSI ID 1. v A non-hot-swap hard disk drive does not require a backplane or tray and it does not have indicator LEDs. However, you must attach the blue rails that come with the drive before installing it in the server. v A non-hot-swap hard disk drive has a jumper block on the rear. Install a jumper in the cable-selection position of the jumper block. For details, see the notes under step 4 on page 20, and the documentation that comes with the drive. v If you install only one hard disk drive, for faster startup, install it in the primary startup device bay. For hot-swap SCSI drives, the drive in bay 1 is the primary startup device. For IDE drives, the drive in bay 2 is the primary startup device. v If you are installing a hot-swap drive, continue with "Installing a hot-swap hard disk drive" on page 19. If you are installing a non-hot-swap drive, go to "Installing a non-hot-swap hard disk drive" on page 20. 18 IBM 325 Type 8835: Option Installation Guide Eserver