Installing System Options
AlphaStation 500 Series User Information 3-11
Storage Devices
The AlphaStation 500 Series system supports five storage devices. The AlphaStation 500
Series system comes equipped with two accessible devices, a slimline 3.5-inch diskette or
optional tape drive, and a 5.25-inch half-high removable media device (CD-ROM). In
addition, up to three non-accessible, optional hard drives may be installed within the
internal storage bays. See Figure 3-3.
General Information on Installing Drives
This section covers general drive installation information, including internal and external
SCSI drives, external SCSI, and cable layouts.
SCSI Addresses (SCSI ID’s)
Before installing a SCSI drive, you must either set or verify the setting of the drive’s SCSI
address (SCSI ID). The SCSI controller chip is normally assigned device ID seven. Digital
recommends that you use Table 3-3 as a guide for the selection of an address for your
SCSI drive.
Table 3-3 SCSI Address Recommendations
SCSI Address (ID)
Device (Drive) Recommended
0
System disk (where your operating system resides)
1
Expansion/hard drive
2
Expansion/hard drive
3
Expansion
4
Tape drive
5
CD-ROM drive
6
Expansion
7
Host adapter (SCSI controller)
See Figure 1-2 for the location of the SCSI bus terminators. Refer to the section on SCSI
Connectors in Appendix C, Technical Specifications, for additional information.
