Product Manual - Hawk 1 Family SCSI-2 (Volume 1), Rev. D
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5.0
Performance characteristics
5.1
Internal drive characteristics (transparent to user)
ST11200
ST1980
ST1950
ST1830
Drive Capacity
1248
1021
953
834
MByte (UNF)
Read/Write Heads
15
13
13
13
Data (Max)
Bytes/Track
41660
45434
46550
48419 Bytes (Avg)
Bytes/Surface
83
78.5
73
64
Mbytes (UNF)
Tracks/Surface, Total
1872
1730
1575
1325
Tracks (user
accessible)
Tracks/Inch
2150
2150
2150
2150
TPI
Servo Heads
1
1
1
1
Internal Data Rate
23.2-40.6
24.4 - 40.6
25.2-41.2
28.4-41.2Mbits/sec
(variable with
zone)
Disc Rotational Speed
5411 +0.5%
5411 +0.5%
4535 +0..5%
4535 +0.5% r/min
Average Rotational Latency
5.54
5.54
6.61
6.61
ms
5.2
SCSI Seek, Read and Write performance characteristics [8]*
Refer to Section 11.7 and to the SCSI-2 Interface Product Manual 77738479 for additional timing details.
5.2.1
Seek time
Drive Level
ST11200
ST1980
ST1950
ST1830
Read
Write
Read
Write
Read
Write
Read
Write
ms
ms
ms
ms
Average
-
Typical [3]
10.5
11.2
9.9
10.6
TBD
TBD
TBD
TBD
Max.
[2]
12.0
13.0
11.4
12.4
TBD
TBD
TBD
TBD
Single Track-
Typical [3]
1.5
2.0
1.5
2.0
TBD
TBD
TBD
TBD
Max.
[2]
3.5
4.0
3.5
4.0
TBD
TBD
TBD
TBD
Full Stroke -
Typical [3]
20.0
21.0
19.0
20.0
TBD
TBD
TBD
TBD
Max.
[2]
23.5
24.5
22.5
23.5
TBD
TBD
TBD
TBD
Including Controller Overhead** [1][4]
ST11200
ST1980
ST1950
ST1830
Read
Write
Read
Write
Read
Write
Read
Write
ms
ms
ms
ms
Average
-
Typical [3]
11.7
12.5
11.1
11.9
TBD
TBD
TBD
TBD
Max.
[2]
14.0
15.0
13.4
14.4
TBD
TBD
TBD
TBD
Single Track -
Typical [3]
2.6
3.3
2.6
3.3
TBD
TBD
TBD
TBD
Max.
[2]
5.5
5.9
5.5
5.9
TBD
TBD
TBD
TBD
Full Stroke -
Typical [3]
21.2
22.4
20.2
21.4
TBD
TBD
TBD
TBD
Max.
[2]
25.7
27.1
24.7
26.1
TBD
TBD
TBD
TBD
9
