Technical information

HGST Ultrastar C15K600 Hard Disk Drive Specification

Table 12 Data Transfer Speed (sector size 4096 Byte case)

Description

Typical (MB / Sec)

Disk - buffer transfer Zone Model Read Write

Instantaneous 0 600/450/300 GB 290.4 290.4

Typical values for sustained disk - buffer transfer rate 0 600/450/300 GB 271.3 271.3

Instantaneous 39 600/450/300 GB 202.1 202.1

Typical values for sustained disk - buffer transfer rate 39 600/450/300 GB 188.8 188.8

Notes:

• For this table, '1 MB / Sec' is defined as 1,000,000 bytes per Second.

• Instantaneous disk-buffer transfer rate is derived by: (Number of sectors on a track) x (sectors/track) x

(revolutions/sec)

• The number of sectors per track will vary by radial zone because linear bit density is approximately

constant while track radius decreases with increasing zone number.

• Sustained disk-buffer transfer rate is the average rate measured while transferring multiple tracks of

data. It differs from the instantaneous transfer rate because of the time required to change tracks

(track skew). In addition, time is added for the occasional missed track switch.

4.4.5

Buffering Operation (read ahead/write cache)

This hard disk drive has a buffer for read ahead (see section 20.8 “Segmented Caching”)

This hard disk drive has a buffer for write cache (see section 20.6 “Write Cache”)