Seek Time; Format Command Execution Time (Minutes) [1]; Generalized Performance Characteristics - Seagate ST3146855LC - Cheetah 146.8 GB Hard Drive Product Manual

4.2.1

Seek time

Average Typical
Single Track Typical
Full Stroke Typical
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.
4.2.2

Format command execution time (minutes) [1]

Maximum (with verify)
Maximum (no verify)
4.2.3

Generalized performance characteristics

Sustainable disc transfer rate:
Minimum [3]
Maximum [3]
SCSI interface data transfer rate (asynchronous):
Maximum instantaneous one byte wide
Maximum instantaneous two bytes wide
Synchronous transfer rate
In low voltage differential (LVD) interface mode
Sector Sizes:
Default
Variable
Read/write consecutive sectors on a track
Flaw reallocation performance impact (for flaws reallocated at format time using
the spare sectors per sparing zone reallocation scheme)
Average rotational latency
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).
[2] Assumes no errors and no sector has been relocated.
[3] Assumes system ability to support the rates listed and no cable loss.
12
Not including controller overhead (msec)
Read
3.5
0.2
6.8
ST3300655LW
ST3300655LC
120
60
73 Mbytes/sec
125 Mbytes/sec
512 byte user data blocks
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.
Write
4.0
0.4
7.5
ST3146855LW
ST3146855LC
90
45
5.0 MBytes/sec [3]
10.0 MBytes/sec [3]
5.0 to 320 MBytes/sec
Cheetah 15K.5 SCSI Product Manual, Rev. H
1 2
,
ST373455LW
ST373455LC
60
30
Yes
Negligible
2.00 msec