Справочник Пользователя для Seagate ST33000650SS
10
Constellation ES.2 SAS Product Manual, Rev. D
5.0
Performance characteristics
This section provides detailed information concerning performance-related characteristics and features of
Constellation ES.2 drives.
Constellation ES.2 drives.
5.1
Internal drive characteristics
ST33000650SS
ST33000651SS
ST33000652SS
Drive capacity
3
TB (formatted, rounded off value)
Read/write data heads
10
Bytes per track
1,419,776
Bytes (average, rounded off values)
Bytes per surface
300,000
MB (unformatted, rounded off value)
Tracks per surface (total)
284,399
Tracks (user accessible)
Tracks per inch
270,000
TPI (average)
Peak bits per inch
1,638,000
BPI
Areal density
444
Gb/in
2
Internal data rate
68.7 - 155
MB/s (variable with zone)
disk rotation speed
7200
rpm
Avg rotational latency
4.16
ms
5.2
Seek performance characteristics
See Section 12.4.1, "SAS physical interface" on page 55 and the SAS Interface Manual (part number
100293071) for additional timing details.
100293071) for additional timing details.
5.2.1
Access time
Not including controller overhead
2
(ms)
1
1.
Execution time measured from receipt of the Command to the Response.
,
Average
Typical
4
3
3.
Typical access times are measured under nominal conditions of temperature, voltage, and horizontal orientation as
measured on a representative sample of drives.
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.
8.3
9.3
8.5
9.5
Single track
Typical
3,4
0.5
0.5
0.7
0.7
Full stroke
Typical
3,4
15.5
16.2
15.7
16.4
2.
Assumes no errors and no sector has been relocated.
Including controller overhead
1, 2
(ms)
Read
Write
Read
Write