Seagate ST300MM0026 Savvio 10K.3 SAS Product Manual - Page 18

Performance characteristics

Get Seagate ST300MM0026 PDF manuals and user guides View all Seagate ST300MM0026 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 18 highlights

5.0 Performance characteristics This section provides detailed information concerning performance-related characteristics and features of Savvio drives. 5.1 Internal drive characteristics Drive capacity Read/write data heads Bytes per track Bytes per surface Tracks per surface (total) Tracks per inch Peak bits per inch Areal density Internal data rate Disk rotation speed Avg rotational latency ST9300603SS ST9300503SS ST9300403SS 300 4 656,985 74,915 113,829 190,000 1,458,000 252 1578 - 850 10k 3.0 ST9146803SS ST9146703SS ST9146603SS 146.8 2 656,985 74,915 113,829 190,000 1,458,000 252 1578 - 850 10k 3.0 Gbytes (formatted, rounded off value) Bytes (average, rounded off values) Mbytes (unformatted, rounded off value) Tracks (user accessible) TPI (average) BPI Gbit/in2 Mbits/sec (variable with zone) rpm msec 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 Average Single track Full stroke Typical3,4 Typical3,4 Typical3,4 Including controller overhead1, 2 (msec) Read Write 4.2 4.6 0.4 0.7 7.68 8.15 Not including controller overhead1,2 (msec) Read Write 4.0 4.4 0.4 0.7 7.48 7.95 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. 10 Savvio 10K.3 SAS Product Manual, Rev. J

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
10
Savvio 10K.3 SAS Product Manual, Rev. J
5.0
Performance characteristics
This section provides detailed information concerning performance-related characteristics and features of Sav-
vio drives.
5.1
Internal drive characteristics
ST9300603SS
ST9146803SS
ST9300503SS
ST9146703SS
ST9300403SS
ST9146603SS
Drive capacity
300
146.8
Gbytes (formatted, rounded off value)
Read/write data heads
4
2
Bytes per track
656,985
656,985
Bytes (average, rounded off values)
Bytes per surface
74,915
74,915
Mbytes (unformatted, rounded off value)
Tracks per surface (total)
113,829
113,829
Tracks (user accessible)
Tracks per inch
190,000
190,000
TPI (average)
Peak bits per inch
1,458,000
1,458,000
BPI
Areal density
252
252
Gbit/in
2
Internal data rate
1578 - 850
1578 - 850
Mbits/sec (variable with zone)
Disk rotation speed
10k
10k
rpm
Avg rotational latency
3.0
3.0
msec
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
Including controller overhead
2
1
1.
Execution time measured from receipt of the Command to the Response.
,
(msec)
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.
,
4.
Access time = controller overhead + average seek time and applies to all data transfer commands.
Access to data = access time + latency time.
4.2
4.6
4.0
4.4
Single track
Typical
3,4
0.4
0.7
0.4
0.7
Full stroke
Typical
3,4
7.68
8.15
7.48
7.95
2.
Assumes no errors and no sector has been relocated.
Not including controller overhead
1,2
(msec)
Read
Write
Read
Write