Cheetah 36LP Product Manual, Rev. B
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 36LP family unless otherwise specified.
Refer to Section 9.10 and to the SCSI Interface Product Manual, part number 75789509, 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
ST336704
36.7
GByte (formatted, rounded off values)
12
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]
5.4
[2]
0.8
[2]
11.2
ST336704
120
60
1 to 1
MByte/sec
MByte/sec
MByte/sec
Not including controller overhead
(without disconnect) [1] [3]
Drive level
Write
Read
6.2
5.2
1.1
0.6
11.9
11.0
5.0 Mbytes/sec [4]
10.0 Mbytes/sec [4]
Ultra2 SCSI
5.0 to 80 Mbytes/sec
Write
msec
6.0
0.9
11.7
Ultra160 SCSI
5.0 to 160 Mbytes/sec
9