Performance Characteristics; Internal Drive Characteristics; Seek Performance Characteristics; Access Time - Seagate ST300MP0004 Product Manual

5.0

Performance characteristics

This section provides detailed information concerning performance-related characteristics and features of Sav-
vio drives.
5.1

Internal drive characteristics

Drive capacity
Read/write data heads
Tracks per surface (total)
Tracks per in
Peak bits per in
Areal density
Internal data rate
Disk rotation speed
Avg rotational latency
5.2

Seek performance characteristics

See Section 12.4.1, "SAS physical interface" on page 59 and the SAS Interface Manual (part number
100293071) for additional timing details.
5.2.1

Access time

3 4
,
Average Typical
3,4
Single track Typical
3,4
Full stroke Typical
1. Execution time measured from receipt of the Command to the Response.
2. Assumes no errors and no sector has been relocated.
3. Typical access times are measured under nominal conditions of temperature, voltage, and horizontal orientation as
measured on a representative sample of drives.
4. Access time = controller overhead + average seek time and applies to all data transfer commands.
Access to data = access time + latency time.
Savvio 15K.3 SAS Product Manual, Rev. E
ST9300653SS ST9146853SS
ST9300553SS ST9146753SS
ST9300453SS ST9146653SS
300 146
4 2
107,400 107,400
273,000 273,000
1601 1601
448 448
1554 - 2267 1554 - 2267
15K 15K
2.0 2.0
Including controller overhead
Read Write
2.9 3.3
0.4 0.6
5.5 5.8
GB (formatted, rounded off value)
Tracks (user accessible including spare tracks)
KTPI (average)
KBPI
2
Gb/in
Mb/s (variable with zone)
RPM
ms
1 2
,
(ms) Not including controller overhead
Read
2.7
0.2
5.3
1, 2
(ms)
Write
3.1
0.4
5.6
11