Sun Microsystems 60 用户手册
C-18
Sun Ultra 60 Service Manual • August 2001
C.1.8.3
Hard Drives
The system unit supports two SCSI hard drive capacities: 4.2-Gbyte and 9.1-Gbyte.
The 4.2-Gbyte hard drive is of the 1-inch form factor. The 9.1-Gbyte hard drive is of
the 1.6-inch form factor. All hard drives have a single connector configuration. A
drive bracket is used to mount the drive.
The 4.2-Gbyte hard drive is of the 1-inch form factor. The 9.1-Gbyte hard drive is of
the 1.6-inch form factor. All hard drives have a single connector configuration. A
drive bracket is used to mount the drive.
lists the supported hard drives.
The 4.2-Gbyte Disk Drive Specifications, part number 802-7744, provides installation
instructions, power requirements, and performance data for the 4.2-Gbyte disk drive.
The 9-Gbyte Disk Drive Specifications, part number 802-7745, provides installation
instructions, power requirements, and performance data for the 9.1-Gbyte disk drive.
instructions, power requirements, and performance data for the 4.2-Gbyte disk drive.
The 9-Gbyte Disk Drive Specifications, part number 802-7745, provides installation
instructions, power requirements, and performance data for the 9.1-Gbyte disk drive.
TRACK0
When active low, TRACK0 indicates that
the track zero sensor has been activated and
that the heads are over the outermost
cylinder.
the track zero sensor has been activated and
that the heads are over the outermost
cylinder.
WRITE_PROTECT
When active low, WRITE_PROTECT
indicates that the inserted diskette is write-
protected and that drive write operations
are disabled.
indicates that the inserted diskette is write-
protected and that drive write operations
are disabled.
READ_DATA
When active, READ_DATA enables data
from the disk to be transferred to the host
through this signal line.
from the disk to be transferred to the host
through this signal line.
HEAD_SELECT
When low, HEAD_SELECT selects head 1.
When high, HEAD_SELECT selects head 0.
When high, HEAD_SELECT selects head 0.
DISK_CHANGE
When low, DISK_CHANGE indicates that
the drive tape medium has been changed.
DISK_CHANGE is reset when a new disk is
inserted and an enable signal is sent by the
host.
the drive tape medium has been changed.
DISK_CHANGE is reset when a new disk is
inserted and an enable signal is sent by the
host.
TABLE C-5
Supported Hard Drives
Form Factor
Dimension
Dimension
Disk Drive Capacity
Wide
RPM
Seek Time
1.00-inch
(2.54 cm)
4.2 Gbyte
Yes
7200
9.5 ms
1.63-inch
(41.3 cm)
(41.3 cm)
9.1 Gbyte
Yes
7200
9.5 ms
TABLE C-4
Diskette Drive Signals and Functions (Continued)
Signal Name
Function