Seagate 146.8GB HD ST3146854LW Manual De Usuario
Los códigos de productos
ST3146854LW
12
Cheetah 15K.4 SCSI Product Manual, Rev. B
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):
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).
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.
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.
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
0.27
0.45
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
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