Table C-7 Supported Target Devices - Sun Microsystems Ultra 60 Service Manual

The Fast-20 electrical characteristics for the host adapter and target device include:
C.1.14.2 Supported Target Devices
The SCSI subsystem supports a maximum of four internal devices, including the
host adapter. The CD-ROM drive is a narrow device. A unipack with one drive or a
six-pack, accommodating six drives, can be used as external devices.
the target devices supported by the SCSI subsystem.
TABLE C-7
Target Device
Internal disks
Internal CD-ROM drive
Internal tape drive(s)
External SPARCstorage UniPack
External SPARCstorage SixPack
C.1.14.3 External Cables
External UltraSCSI-compliant SCSI cables have an impedance of 90 ohm (+/- 6 ohm)
and are required for UltraSCSI interface. Sun's implementation of UltraSCSI requires
that the total SCSI bus length be limited to no more than approximately 20 feet
(6 meters) with up to 12 Sun compensated devices. Due to the considerably short
bus length, an approximate 32-inch (0.8-meter) UltraSCSI-compliant external cable is
supported in addition to an approximate 6.5-foot (2-meter) UltraSCSI-compliant
external cable.
Note – Consult your authorized Sun sales representative or service provider to
order a 0.8-meter or a 2-meter UltraSCSI-compliant external cable.
V (input low) equals 1.0 Vdc maximum (signal true)
il
V (input high) equals 1.9 Vdc minimum (signal false)
ih
(input low current) equals +/- 20 µA at Vi equals 0.5 Vdc
I
il
(input high current) equals +/- 20 µA at Vi equals 2.7 Vdc
I
ih
Minimum input hysteresis equals 0.3 Vdc
Supported Target Devices
Comment
Up to two 3.5-inch x 1.6-inch disks (4.2-, or
9.1-Gbyte). All internal disks are
UltraSCSI-compliant.
Optional 644-Mbyte SunCD 12X speed;
photo CD compatible. Headphone jack with
volume control. CD-ROM drive is a narrow
SCSI device.
Refer to product guide.
Refer to product guide.
Refer to product guide.
Appendix C Functional Description
lists
TABLE C-7
C-31