Performance Characteristics; Internal Drive Characteristics; Seek Performance; Access Time - Seagate Cheetah NS 10K Product Manual

4.0

Performance characteristics

This section provides detailed information concerning performance-related characteristics and features of
Cheetah NS FC drives.
4.1

Internal drive characteristics

Drive capacity*
Read/write data heads
Tracks per surface (total)
Tracks per inch
Peak bits per inch
Areal density
Internal data rate
Disc rotation speed
Avg rotational latency
*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment
and formatting.
4.2

Seek performance

See Section 9.5, "FC-AL physical interface" on page 61 and the Fibre Channel Interface Manual (part number
77767496) for additional timing details.
4.2.1

Access time

Average Typical
Single track Typical
Full stroke Typical
1. Typical access times are measured under nominal conditions of temperature, voltage,
and horizontal orientation as measured on a representative sample of drives.
2. Access to data = access time + latency time.
Cheetah NS FC Product Manual, Rev. A
ST3400755FC ST3300955FC
400.0 300
8 4
92,200 92,200
155,000 155,000
979k 979k
151.7 151.7
725 to 1,211 725 to 1,211
10k 10k
2.98 2.98
Not including controller overhead
Read
3.9
0.35
6.8
Gbytes (formatted, rounded off value)
Tracks (user accessible)
TPI
BPI
2
Gbits/inch
Mbits/sec (variable with zone)
rpm
msec
1 2
,
(msec)
Write
4.2
0.52
7.5
11