Performance Characteristics; Internal Drive Characteristics (Transparent To User); Scsi Performance Characteristics (Visible To User); Access Time - Seagate ST173404LW Product Manual

Cheetah 73 Product Manual, Rev. D
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
4.2

SCSI performance characteristics (visible to user)

The values given in Section 4.2.1 apply to all models of the Cheetah 73 family unless otherwise specified.
Refer to Section 9.10 and to the SCSI Interface Product Manual for additional timing details.
4.2.1

Access time [5]

Average – Typical
Single Track – Typical
Full Stroke – Typical
4.2.2

Format command execution time (minutes) [1]

Maximum (with verify)
Maximum (no verify)
4.2.3

Generalized performance characteristics

Minimum sector interleave
Data buffer transfer rate to/from disc media (one 512-byte sector):
Min. [3]* 26.7
Avg. [3] 33.0
Max. [3] 40.2
SCSI interface data transfer rate (asynchronous):
Maximum instantaneous one byte wide
Maximum instantaneous two bytes wide
Synchronous formatted transfer rate
In low voltage differential (LVD) interface mode
ST173404
73.4 GByte (formatted, rounded off values)
24
215,248 Bytes (average, rounded off values)
3,035 Mbytes (unformatted, rounded off values)
14,100 Tracks (user accessible)
18,145 TPI
334 KBPI
280-427 Mbits/sec (variable with zone)
10,033 r/min (+0.5%)
2.99 msec
Including controller overhead
(without disconnect) [1] [3]
Drive level
Read
msec
[2] 6.05
[2] 0.8
[2] 14.2
ST173404
240
120
1 to 1
MByte/sec
MByte/sec
MByte/sec
Not Including controller overhead
(without disconnect) [1] [3]
Drive level
Write Read
6.55 5.85
1.1 0.6
15.2 14.0
5.0 Mbytes/sec [4]
10.0 Mbytes/sec [4]
Ultra2 SCSI
5.0 to 80 Mbytes/sec
Write
msec
6.35
0.9
15.0
Ultra160 SCSI
5.0 to 160 Mbytes/sec
9