The 3DRAM is a standard dynamic random access memory (DRAM) that includesa
multi-level cache and a separate graphics port. The FBC ASIC provides acceleration
for 2D and 3D imaging primitives. This, combined with the 3DRAM cache and
support for graphics operations, supports a high-performance frame buffer.
C.1.6 Peripherals
The following sections describe peripherals that aresupported by the system:
Section C.1.6.1 “CD-ROM Drive” on page 260
Section C.1.6.2 “Hard Drives” on page 260

C.1.6.1 CD-ROM Drive

The Sun StorEdgeTM CD32 CD-ROM drive is a32x-speed (maximum) read-only
random access CD-ROM device. It operates on the industry-standard SCSI-2
interface. The CD32 drive uses standard 4.76-inch (120-mm), 644-Mbyte compact
disks. The Sun StorEdge CD32 Installation and User’s Guide, part number 805-4237,
provides cleaning, jumper setting, and operation instructions for the CD-ROM drive.
Note - The CD-ROM drive is factory setto SCSI targetID 6. Refer to the Sun StorEdge
CD32 Installation and User’s Guide,part number 805-4237, to change the target address.

C.1.6.2 Hard Drives

The system supports two SCSI hard drive capacities: 9.1-Gbyte and 18-Gbyte. The
hard drives have a singleconnector configuration. A drive bracket is used to mount
the drive. The following table lists the supported hard drives.
Form Factor
Dimension
Disk Drive
Capacity Wide RPM Average Seek
Time(Read/
Write)
1.00-inch (2.54
cm) 9.1 Gbytes Yes 10K 5.4msec/6.2
msec
1.00-inch (2.54
cm) 18 Gbytes Yes 10K 7/5 msec/8.5
mses
The 9-Gbyte 10K rpm Disk Drive Specifications SCA Interface, part number 805-5637,
provides installation instructions, power requirements, and performance data for the
9.1-Gbyte hard drive. The 18-Gbyte 10K rpm Disk Drive Specifications, part number
260 Sun Enterprise 220R Server Service Manual ♦January 2000, Revision A