Seagate Cheetah ST3146854, User Manual

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12 Cheetah 15K.4 SCSI Product Manual, Rev. D
4.2.1 Access time
4.2.2 Format command execution time (minutes) [1]
4.2.3 Generalized performance characteristics
Data buffer transfer rate to/from disc media (one 512-byte sector):
Sustainable disc transfer rate:
SCSI interface data transfer rate (asynchronous):
Synchronous transfer rate
Sector Sizes:
Default 512 byte user data blocks
Variable 512 to 528 bytes per sector in even number of bytes per sector.
If n (number of bytes per sector) is odd, then n-1 will be used.
Notes for Section 4.2.
[1] Execution time measured from receipt of the last byte of the Command Descriptor Block (CDB) to the
request for a Status Byte Transfer to the Initiator (excluding connect/disconnect).
Not including controller overhead (msec)
1
,
2
1. Typical access times are measured under nominal conditions of temperature, volt-
age, and horizontal orientation as measured on a representative sample of drives.
2. Access to data = access time + latency time.
Read Write
Average Typical 3.5 4.0
Single Track Typical 0.2 0.4
Full Stroke Typical 7.4 7.9
ST3146854 ST373454 ST336754
Maximum (with verify) 90 60 30
Maximum (no verify) 45 30 15
Minimum [3] 685 Mbits/sec
Maximum [3] 1,142 Mbits/sec
Minimum [3] 58 Mbytes/sec
Maximum [3] 96 Mbytes/sec
Maximum instantaneous one byte wide 5.0 MBytes/sec [3]
Maximum instantaneous two bytes wide 10.0 MBytes/sec [3]
In low voltage differential (LVD) interface mode 5.0 to 320 MBytes/sec
Read/write consecutive sectors on a track Yes
Flaw reallocation performance impact (for flaws reallocated at format time using
the spare sectors per sparing zone reallocation scheme)
Negligible
Average rotational latency 2.00 msec