HP 6642D (US) Specification summary table, Drive Specification, ST317221A, ST313021A, ST38410A

2

U8 Family Product Manual, Rev. B

Drive Specification

ST317221A

ST313021A

ST38410A

ST34313A

Guaranteed Mbytes (×106 bytes)

17,245

13,022

8,622

4,327

Guaranteed sectors

33,683,328

25,434,228

16,841,664

8,452,080

Bytes per sector

512

Default sectors per track

63

Default read/write heads

16

16

16

15

Default cylinders

16,383

16,383

16,383

8,944

Physical read/write heads

4

3

2

1

Discs

2

2

1

1

Recording density

BPI (bits/inch max)

349,374

Track density

TPI (tracks/inch)

18,700

Areal density

(Mbits/inch2 max)

6,536

Spindle speed (RPM)

5,400

Internal data-transfer rate (Mbits/

sec max)

285.5

I/O data-transfer rate (Mbytes/

sec max)

66.6

ATA data-transfer modes

PIO modes 0–4

supported

Multiword DMA modes 0–2

Ultra DMA modes 0–4

Cache buffer (Kbytes)

512

256-Kbyte cache is optional for the ST34313A

Height (mm max)

26.1

Width (mm max)

102

Length (mm max)

147.0

Weight (typical)

590 grams (1.3 lb)

Track-to-track seek time

(msec typical)

1.5 (read) 2.1 (write)

Average seek time (msec typical)

8.9