8-53.5-INCH HARD DISK DRIVEThe 3.5-inch device bay in front of the server contains six slots in which hard disks with the SCA2interface are installed.The figures used in this section show the rack-mount model. The orientation is the only differencefrom the tower model.IMPORTANT: Do not use any hard disks that are not authorized by NEC. Installing a third-party hard diskmay cause a failure of the server as well as the hard disk. Purchase hard disks of the samemodel in pair. Contact your sales agent for hard disk drives optimum for your server. The OS starts from the hard disk that is mounted in Slot 1 of the primary module (whosePOWER LED is on). If you shut down the OS with the PCI module not duplicated, RAID of the hard disk drivesmay be disconnected. When starting the OS after this happened, start from the hard diskdrive mounted on the PCI module which was online when the OS was shut down. (SeeChapter 7 “Troubleshooting” for details). When expanding hard disk drives to the 3.5-inch device bays, make sure to perform theoperation of “RAID CONFIGURATION WHEN DISKS ARE ADDED” described later.TIPS: POWER LED is on to indicate that it is the primary module. The module that you plug in first will be the primary module.You can install hard disks, each of which is about 25.4 mm (1 inch) in thickness, to the three slots ofeach module. Each device bay has a label describing the slot number.Disks of the same slot number are mirrored between the groups. The figure below shows the groupsand mirroring slots.Group 1Group 2Slots 1 Slots 2 Slots 3Slots used in mirroring
