Seagate Elite 23 ST423451N, Product Manual

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Elite 23 Product Manual, Rev. A 9
4.0 Performance characteristics
4.1 Internal drive characteristics (transparent to user)
[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
4.2.2 Format command execution time (for
≥
512-byte sectors)
4.2.3 General performance characteristics
Data buffer data transfer rate to/from disc media (one 512-byte sector) variable with zone/cylinder:
SCSI interface data transfer rate (asynchronous) [5]:
Maximum instantaneous (1-byte-wide transfer rate) 5.0 Mbytes/sec [6]
Maximum instantaneous (2-byte-wide transfer rate) 10.0 Mbytes/sec [7]
Synchronous transfer rate for SCSI Fast-20 (Ultra SCSI):
8 bit data bus models 2.5 to 20 Mbytes/sec
16 bit data bus models 5.0 to 40 Mbytes/sec
[ ] All notes for Sections 4.2 are listed at end of Section 4.2.3.
ST423451
Drive capacity 29.4 Gbyte (unformatted) [1]
Read/write heads 28
Bytes/track 152,908 Bytes (average, unformatted) [1]
Bytes/surface 1,051 Mbytes (unformatted)
Tracks/surface, total 6,876 Tracks (user accessible)
Tracks/inch 5,555 TPI
Peak bits/inch 125,360 BPI
Internal data rate 86-124 Mbits/sec (variable with zone)
Disc rotational speed 5,400
±
0.5% r/min
Average rotational latency 5.55 msec
Including controller overhead
(without disconnect) [1] [4]
Drive level
Read Write
ms
Average Typical [3] 13.2 14.2
Single track Typical [3] 1.3 2.3
Full stroke Typical [3] 28.2 28.2
Maximum (with verify) 6.5 hours
Maximum (no verify) 3.75 hours
Minimum sector interleave 1 to 1
Minimum [4] 86 Mbits/sec
Maximum [4] 124 Mbits/sec