Specifications

DAT Backup/Restore
Set Up
SCSI Review
The Small Computer Systems Interface (SCSI, pronounced “scuzzy”) is a standardized
communication protocol for small computers (such as the Macintosh and the ASR-10) and
peripheral storage devices (hard disk drives, CD ROM players, etc.) that allows for quick and
efficient transfer of digital information. You may have up to eight SCSI devices connected on a
single SCSI network. These devices can be computers, disk drives, tape backup systems, musical
instruments, and other types of equipment.
Here is an overview of what you must do to make your SCSI system work:
1. The ASR-10 requires a specific file format on any SCSI Storage Device that it uses, and any
storage devices used with the ASR-10 must be formatted exclusively for that purpose. ASR-10
files cannot be saved directly to a SCSI hard drive formatted for use with a Macintosh, nor
can the Macintosh store files on a SCSI hard drive formatted for the ASR-10. If you are using
a SCSI network configuration that includes a Macintosh and a Macintosh-formatted SCSI
drive, make sure that you understand this distinction.
2 Make sure that the SCSI cable has a 25-pin D-type connector (dB-25P) on one end. Use this
cable to connect the ASR-10 to a hard drive. Most SCSI hard drive manufacturers supply this
type of cable with the drive.
3. Make sure your SCSI Storage Device has a terminator - either internal or external. The SCSI
terminator is a resistor network on each SCSI signal on the SCSI bus that allows reliable high
speed data transfers. The terminator is usually implemented in one of two ways; either
externally or internally. The documentation that accompanied your storage device will
usually describe the procedures required for installation and removal of terminators.
The SCSI installed in the ASR-10 rack mount (or the SF’-3 SCSI Kit for the ASR-10 keyboard
version) contains internal termination via removable resistor packs.
4. SET THE PRIORITY/ID ON YOUR SCSI DEVICE TO ANY PRIORITY/ID NUMBER FROM
0 TO 7 OTHER THAN 3. Each device on the SCSI network must be assigned a different ID
number. The SCSI ID number can range from 0 to 7, with 7 being the highest priority. The
priority of a SCSI device becomes important if two devices are trying to control the SCSI bus
at the same time. In this case, the device with the highest priority will gain control of the
SCSI bus.
The ASR-10 has a fixed SCSI ID of 3. The ID of your SCSI Storage Device must be different
from that of the ASR-10. If it isn’t, the ASR-10 wiIl never see it. Most SCSI Storage Devices
provide a way of changing their ID. Refer to the manuals for the SCSI Storage Devices in
your system to determine how to change their SCSI ID’s.
Refer to the P-3 SCSI Interface section of this manual for additional information.
ENSONIQ ASR-IO Version 3 Operating System
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