Generalized Performance Characteristics - Seagate ST12400N Product Manual

10
_________________________________________________________________________________________
5.3

Generalized performance characteristics

Minimum Sector Interleave
Data Buffer To/From Disc Media
Data transfer rate (< 1 sector) - 512 Byte Sector
Min. [4]* 3.35 MByte/sec
Avg. [4] 4.59 MByte/sec
Max. [4] 5.35 MByte/sec
Data Buffer To/From Disc Media
Data Transfer Rate (< 1 Track) - 512 Byte Sector
Min. [4] 2.88 MByte/sec divided by (Interleave Factor)
Avg. [4] 3.94 MByte/sec divided by (Interleave Factor)
Max. [4] 4.6 Mbyte/sec divided by (Interleave Factor)
SCSI Interface Data
Transfer Rate (Asynchronous) [5]
-Maximum Instantaneous
-Maximum Average
Sector Sizes 512 user data blocks (default)
Variable (256 to 4096) in even sector sizes
Synchronous Transfer Rate
From 1.25 MByte/sec to 10.0 MBytes/sec (See section 11.5.)
Read/Write consecutive sectors on a track
Flaw reallocation performance impact (For flaws reallocated using the spare
sectors per track reallocation scheme.)
Flaw reallocation performance impact (For flaws reallocated using the spare
sectors per cylinder reallocation scheme.)
Flaw reallocation performance impact (For flaws reallocated using the spare tracks
per volume reallocation scheme.)
Overhead time for head switch (512 byte sectors)
Overhead time for one track cylinder switch
Average rotational latency
* [ ] All notes are listed in Section 5.3.1.
** Assumes system ability to support 5.2 Mb/s and no cable loss.
*** Assumes typical host delays and cable losses.
Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. B
1 to 1
ST12400N/NC/ST11900N/NC
** 5.2 MBytes/sec
*** 3.1 MBytes/sec
ST12400ND/ST11900ND
3.3 MBytes/sec
2.4 MBytes/sec
Yes
Negligible
Negligible
35 ms (typical)
1 ms
<3 ms Typical
5.54 ms