Performance Characteristics; Internal Drive Characteristics; Seek Time; Access Time - Seagate CHEETAH 15K.7 SAS ST3300457SS Product Manual

5.0

Performance characteristics

This section provides detailed information concerning performance-related characteristics and features of
Cheetah 15K.7 drives.
5.1

Internal drive characteristics

Drive capacity
Read/write data heads
Tracks per inch
Peak bits per inch
Areal Density
Internal data rate
Disk 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.
5.2

Seek time

See Section 12.4.1, "SAS physical interface" on page 58 and the SAS Interface Manual (part number
100293071) for additional timing details.
5.2.1

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 15K.7 SAS Product Manual, Rev. D
ST3600057SS ST3450857SS ST3300657SS
ST3600957SS ST3450757SS ST3300557SS
ST3600857SS ST3450657SS ST3300457SS
600 450
8 6
165,000 165,000
1,361 1,361
225 225
1.49 - 2.37 1.49 - 2.37
15k 15k
2.0 2.0
Not Including controller overhead
Read
3.4
0.2
6.6
300 Gbytes (formatted, rounded off value)
4
165,000 TPI
1,361 KBPI
225 Gbits/inch
1.49 - 2.37 Gbits/sec (max)
15k RPM
2.0 msec
1 2
,
(msec)
Write
3.9
0.44
7.4
2
*
9