Performance Characteristics; Internal Drive Characteristics (Transparent To User); Scsi Seek Performance Characteristics (Visible To User); Access Time - Seagate ST423451N Product Manual

Elite 23 Product Manual, Rev. A
4.0

Performance characteristics

4.1

Internal drive characteristics (transparent to user)

Drive capacity
Read/write heads
Bytes/track
Bytes/surface
Tracks/surface, total
Tracks/inch
Peak bits/inch
Internal data rate
Disc rotational speed
Average rotational latency
[1] Rounded off values
4.2

SCSI seek performance characteristics (visible to user)

The values given in Section 4.2.1 apply to all Elite 23 models unless otherwise specified. Refer to Section 9.10
and to the SCSI Interface Product Manual (part number 77738479) for additional timing details.
4.2.1

Access time

Average Typical [3]
Single track Typical [3]
Full stroke Typical [3]
Format command execution time (for ≥ 512-byte sectors)
4.2.2
Maximum (with verify)
Maximum (no verify)
4.2.3

General performance characteristics

Minimum sector interleave
Data buffer data transfer rate to/from disc media (one 512-byte sector) variable with zone/cylinder:
Minimum [4]
Maximum [4]
SCSI interface data transfer rate (asynchronous) [5]:
Maximum instantaneous (1-byte-wide transfer rate)
Maximum instantaneous (2-byte-wide transfer rate)
Synchronous transfer rate for SCSI Fast-20 (Ultra SCSI):
8 bit data bus models
16 bit data bus models
[ ] All notes for Sections 4.2 are listed at end of Section 4.2.3.
ST423451
29.4 Gbyte (unformatted) [1]
28
152,908 Bytes (average, unformatted) [1]
1,051 Mbytes (unformatted)
6,876 Tracks (user accessible)
5,555 TPI
125,360 BPI
86-124 Mbits/sec (variable with zone)
5,400 ± 0.5% r/min
5.55 msec
Including controller overhead
(without disconnect) [1] [4]
Drive level
Read Write
ms
13.2 14.2
1.3 2.3
28.2 28.2
6.5 hours
3.75 hours
1 to 1
86 Mbits/sec
124 Mbits/sec
5.0 Mbytes/sec [6]
10.0 Mbytes/sec [7]
2.5 to 20 Mbytes/sec
5.0 to 40 Mbytes/sec
9