Expanding Your System
Adding Mass Storage Devices
Your system has two drive bay areas: the upper drive bay and the lower drive bay. You
can install mass storage devices such as hard disk drives, floppy diskette drives, CD-ROM
drives, and tape backup drives in these drive bay areas:
•
Upper drive bay area. This area has room for three 5.25-inch half-height devices.
Each drive bay is equipped with a removable panel to accommodate devices requiring
front panel access.
The bottom two bays of this area can be used to mount one full-height drive. The
drive rails are removable to accommodate a full-height device.
•
Lower drive bay area. This area has a drive bay assembly that holds a 3.5-inch floppy
diskette drive (standard on all Digital AlphaStation 400 Series systems) and one
hidden (nonaccessible from the front) 3.5-inch half-height device. This hidden bay is
typically used for mounting the system's primary hard disk drive.
Expansion Brackets
You can install half-height devices in any of the three positions in the upper drive bay
area. To install a 3.5-inch device in the upper drive bay, install the drive expansion
brackets onto the device.
__________________________NOTE ____________________________
Be sure to use the brackets that came with the system, rather than those that
came with the drive.
____________________________________________________________
SCSI Bus Length
The total SCSI bus length, including internal cables and etch on the motherboard as well
as the external cables between storage enclosures and the cables inside the storage
enclosures, must not exceed 3 meters (9.8 feet) for fast SCSI operation or 4 meters (13.1
feet) for slow SCSI (5 MB/second) operation. The Digital AlphaStation 400 Series
system's internal SCSI length is 1.5 meters (4.9 feet), leaving 1.5 meters (4.9 feet)
available for fast SCSI use (2.5 meters [8.2 feet] for external slow SCSI use).
SCSI Addresses
Before installing a SCSI drive, you must either set or verify the setting of the drive's SCSI
address (SCSI ID). Digital recommends that you use Table 3-3 as a guide to the selection
of an address for your SCSI drive.
3-10
Содержание Digital AlphaStation 400 Series
Страница 4: ......
Страница 30: ......
Страница 38: ......
Страница 53: ...Expanding Your System Figure 3 11 SCSI and FDC Cable Configuration 3 15...
Страница 56: ...Expanding Your System MLO 012675 Figure 3 13 Removing the Lower Drive Bay Assembly 3 18...
Страница 58: ......
Страница 90: ......
Страница 102: ......