10
Barracuda 4LP Product Manual, Rev. D
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):
Data buffer transfer rate to/from disc media: (< 1 track):
SCSI interface data transfer rate (asynchronous) [5]:
Maximum instantaneous
6.0 Mbytes/sec [6]
Maximum average
6.0 Mbytes/sec [7]
Synchronous transfer rate for SCSI Fast-20 (Ultra SCSI):
1.25 to 20 Mbytes/sec
(8 bit data bus models)
Synchronous transfer rate for SCSI Fast-20 (Ultra SCSI):
2.5 to 40 Mbytes/sec
(16 bit data bus models)
Synchronous transfer rate for fast SCSI-2:
1.25 to 10 Mbytes/sec
(8 bit data bus models)
Synchronous transfer rate for fast SCSI-2:
2.5 to 20 Mbytes/sec
(16 bit data bus models).
Sector Sizes:
Default
512 byte user data blocks
Variable
180 to 4,096 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 listed after Section 4.2.3.
ST34371/ST34571
ST32171/ST32271
Maximum (with verify)
95
50
Maximum (no verify)
65
35
Minimum sector interleave
1 to 1
Min.
[4]*
9.5
MByte/sec
Avg.
[4]
13.2
MByte/sec
Max.
[4]
15.0
MByte/sec
Min.
[4]
7.1
MByte/sec
divided by (interleave factor)
Avg.
[4]
10.2
MByte/sec
divided by (interleave factor)
Max.
[4]
11.7
MByte/sec
divided by (interleave factor)
Read/write consecutive sectors on a track
Yes
Flaw reallocation performance impact (for flaws reallocated at format time using
the spare sectors per sparing region reallocation scheme.)
Negligible
Overhead time for head switch (512 byte sectors) in sequential mode
1 msec
Overhead time for one track cylinder switch in sequential mode
<2.4 msec (typical)
Average rotational latency
4.17 msec
