Seagate ST19171WC User Manual

16

Barracuda 9 Installation Guide, Rev. B

Interface

SCSI Fast-20 (also called 
Ultra SCSI)

Capacity

Unformatted

11.7 Gbytes

Formatted

9.1 Gbytes

Recording

Cylinders (user)

5,274

Read/write data heads

20

Servo heads

Embedded

Seek time

Average read

9.7 msec

Average write

10.7 msec

Disc rotation

RPM

7,200 ±0.5%

Average latency

4.17 msec

Internal transfer rate

80 to 124

(Mbits/sec, variable with zone)

Max sync. SCSI transfer rate

N

20 Mbytes/sec

W/WD/WC/DC

40 Mbytes/sec

Multi-segmented cache

512 Kbytes
2,048 Kbytes (optional)

1

Can also be operated according to SCSI-1 and SCSI-2 proto-

cols.

2

Standard factory units are formatted as follows:

512 data bytes per sector
9 spare sectors per cylinder
1 cylinder at the inner track reserved for spares

3

Includes on-board controller overhead.