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8
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 15K.3 SCSI family unless otherwise spec-
ified. Refer to Section 9.10 and to the SCSI Interface Product Manual for additional timing details.
4.2.1
Access time [5]
Average–Typical [2]
Single Track–Typical [2]
Full Stroke–Typical [2]
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):
Minimum [3]*
Maximum [3]
SCSI interface data transfer rate (asynchronous):
Maximum instantaneous one byte wide
Maximum instantaneous two bytes wide
Synchronous transfer rate
In low voltage differential (LVD) interface mode
ST373453 ST336753 ST318453
73.4
36.7
8
4
377,770
377,770
377,770
12,046
12,046
12,046
31,310
31,310
31,310
64,000
64,000
533
533
632-891
632-891
15k
15k
15k
2.0
2.0
Including controller overhead
(without disconnect) [1] [3]
Drive level
Read
Write
msec
3.8
4.1
0.40
0.60
6.7
7.1
ST373453
ST336753
90
60
45
30
1 to 1
56.1 MBytes/sec
86.0 MBytes/sec
Cheetah 15K.3 SCSI Product Manual, Rev. G
18.4
GByte (formatted, rounded off values)
2
Bytes (average, rounded off values)
Mbytes (unformatted, rounded off values)
Tracks (user accessible)
64,000
TPI
533
KBPI
632-891
Mbits/sec (variable with zone)
r/min
2.0
msec
Not including controller overhead
(without disconnect) [1] [3]
Drive level
Read
msec
3.6
0.20
6.5
ST318453
30
15
5.0 Mbytes/sec [4]
10.0 Mbytes/sec [4]
5.0 to 320 Mbytes/sec
Write
3.9
0.40
6.9
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