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10 Savvio 10K.3 SAS Product Manual, Rev. G
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 1
13,829 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)
Disc 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 58 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
43
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