Your server contains hardware that lets you replace a failed hard disk drive withoutturning off the server. Therefore, you have the advantage of continuing to operateyour system while a hard disk drive is removed or installed. These drives areknown as hot-swappable drives. They are also referred to as hot-swap drives.Each hot-swap drive that you plan to install must have a hot-swap-drive trayattached. The drive must have a single connector attachment (SCA) connector.Hot-swap-drive trays come with the hot-swap drives. Your server comes with a preinstalled 3.5-inch, 1.44 MB diskette drive and apreinstalled IDE CD-ROM drive. Bays A and B come without a device installed. These bays are for 5.25-inch,half-high, removable-media drives, such as tape backup drives. Bays A and Bcan be combined into a single full-high bay. Your server supports only one diskette drive.Note: The EMI integrity and cooling of the server are both protected by havingbays A and B covered or occupied. When you install a drive, save thefiller panel from the bay, in case you later remove the drive and do notreplace it with another. If you are installing a device with a 50-pin connector in one of the non-hot-swapbays (bays A and B), you need a 68-pin to 50-pin converter. To order theconverter, contact your IBM reseller or IBM marketing representative. Your server supports six slim (1-inch) or three half-high (1.6-inch), 3.5-inchhot-swap hard disk drives in the hot-swap bays. The hot-swap bays connect to a SCSI backplane. This backplane is theprinted circuit board behind the bay. The backplane supports up to six harddisk drives. The diskette drive uses 1 MB and 2 MB diskettes. For optimum use,format 1 MB diskettes to 720 KB and format 2 MB diskettes to 1.44 MB.Rack model1 Hot-swap bays2 CD-ROM drive bay3 Non-hot-swap bay B4 Non-hot-swap bay A5 Diskette drive bay B6 SCSI ID 9 bay7 SCSI ID 5 bay8 SCSI ID 4 bay9 SCSI ID 3 bay1 SCSI ID 1 bay11 SCSI ID 0 bay68 IBM xSeries User's Reference