System information

Upgrading Your System
AlphaServer 1000 to 1000A Upgrade 1-5
Removing StorageWorks Hard Disk Drives
Remove the StorageWorks drives from your AlphaServer 1000 system by
squeezing the outer mounting tabs while pulling the drive out. Refer to Figure 2.
Install the drives in your AlphaServer 1000A Model 5/xxx system by slowly and
firmly sliding the drive unit in until it “snaps” into place.
If you are maintaining the same storage configuration, install the drives in the same
relative position, that is the top drive in the AlphaServer 1000 becomes the top
drive in the AlphaServer 1000A system.
Install the external SCSI terminator (50-pin) onto the external bulkhead connector.
Refer to Figure 3. The terminator ships in the accessories kit with the AlphaServer
1000A system.
The embedded SCSI controller on the system board:
• Supports a total of seven drives.
• Provides 8-bit Fast narrow SCSI-2 support for up to two 5.25 inch internal
removable-media devices and one external bulkhead connector.
• Provides 16-bit fast-wide SCSI-2 support for internal StorageWorks devices
(narrow devices are also supported).
Refer to the AlphaServer 1000A Owner’s Guide for more information on SCSI bus
configurations.
When configuring the StorageWorks shelf, note the following:
• Narrow SCSI (8-bit) devices can be used in the wide StorageWorks shelf, as
long as the devices are at a supported revision level. The narrow devices will
run in narrow mode.
• Narrow and wide devices can be mixed in the wide StorageWorks shelf. In a
mixed configuration, wide devices run in wide mode and narrow devices run in
narrow mode.
• For best performance, wide devices should be operated in wide SCSI-2 mode
Supported devices and configuration rules for wide SCSI-2 are described in the
Wide SCSI Technical Bulletin. This bulletin is frequently updated and can be
downloaded from the Internet:
Via FTP on ftp.digital.com —Once connected, go to /pub/Digital/Alpha/systems
Via the World Wide Web at http://www.service.digital.com/alpha/server