IBM xSeries 342 2RX Maintenance Manual

Contents

v Your server comes with one 3.5-inch, 1.44 MB diskette drive and one 48x IDECD-ROM drive.v The empty bays below the diskette drive come without a device installed. Youcan use these bays for 5.25-inch, half-high, removable-media drives, such as tapebackup drives. You also can combine these bays into a single, full-high bay andinstall a digital linear tape (DLT) drive; or, you can install an xSeries Media BayUltra 160 Hot Swap Conversion Kit option, which converts these bays to threehot-swap drive bays.v The xSeries 342 server supports only one diskette drive.v If you are installing a device with a 50-pin connector in either of the 5.25-inchbays, you need a 68-pin to 50-pin converter (option number 32G3925).v Your server supports three slim-high (1-inch) hot-swap hard disk drives in thehot-swap bays. If your server has the xSeries Media Bay Ultra 160 Hot SwapConversion Kit option installed, it supports three additional hot-swap hard diskdrives.v The hot-swap bays connect to a SCSI backplane. This backplane is a printedcircuit board behind the bay.Note: The server EMI integrity and cooling are both protected by having the5.25-inch bays covered or occupied. When you install a drive, save the fillerpanel from the bay, in case you later remove the drive and do not replace itwith another.SCSI drivesSome drives have a special design called small computer system interface, or SCSI.This design allows you to attach multiple drives to a single SCSI channel.Notes:1. Any information about SCSI drives also applies to other SCSI devices, such astape drives.2. If you plan to install both internal and external SCSI devices, you must followthe instructions in “Connecting external options” on page 63, in addition to theinstructions in this section.A 16-bit (wide) SCSI cable connects the SCSI hard-disk drive backplane to anintegrated SCSI controller on the system board. An additional 16-bit 1-drop SCSIcable is shipped inside your server. It is folded and restrained with a cable clampon the bottom of the server chassis near the empty bays. You can use this cable toconnect an optional SCSI device installed in one of the empty 5.25-inch bays to theSCSI channel A connector on the system board.SCSI IDsEach SCSI device that is connected to an individual channel of a SCSI controllerneeds a unique identification (ID) so that the controller can identify the devicesand ensure that different devices do not attempt to transfer data at the same time.If you need to set IDs for SCSI devices, refer to the instructions that come withthose devices.Your server automatically sets SCSI IDs for hot-swap hard disk drives.The SCSI ID assigned to each hot-swap bay is shown on your server beside thebay. The server uses the hard disk drive SCSI IDs to send status information to theindicator lights above each hot-swap bay.50 Hardware Maintenance Manual: xSeries 342 Model 1RX, 2RX, 1TG, 2TG