Sun Microsystems 60 service manual Table C-5Supported Hard Drives

TABLE C-4Diskette Drive Signals and Functions (Continued)

Signal Name	Function
TRACK0	When active low, TRACK0 indicates that
	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.
READ_DATA	When active, READ_DATA enables data
	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.
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.

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. TABLE C-5lists 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.

TABLE C-5Supported Hard Drives

Form Factor
Dimension	Disk Drive Capacity	Wide	RPM	Seek Time
1.00-inch	4.2 Gbyte	Yes	7200	9.5 ms
(2.54 cm)
1.63-inch	9.1 Gbyte	Yes	7200	9.5 ms
(41.3 cm)

C-18Sun Ultra 60 Service Manual • August 2001