IBM DBCA-204860 Hard Drive Specifications - Page 17

Drive Characteristics

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3.0 Drive Characteristics This chapter provides the characteristics of the drives. 3.1 Logical Drive Format The customer usable data capacity is as shown below. Figure 3. Drive Parameter Descriptions Logical Head Number Logical Sectors/Track Logical Cylinder Number Logical Sector Size Total Customer Usable Data Sectors Total Customer Usable Data Bytes DBCA-203240 16 63 6304 512 6 354 432 3250 MB 3,253,469,184 DBCA-204860 15 63 10068 512 9 514 260 4870 MB 4,871,301,120 DBCA-206480 15 63 13424 512 12 685 680 6490 MB 6,495,068,160 3.2 Data Sheet Figure 4. Data Sheet Media transfer rate [Mb/sec] Interface transfer rate [MB/sec] Data buffer size [ KB] Rotational speed [RPM] Average latency [msec] Recording density [Kbpi] Track density [TPI] Areal density [Gb/sq.in.] Number of zone Number of disks Number of heads Servo design method 69.0 - 118.0 33.3 MB/sec Max ( Ultra DMA Mode-2 ) 16.6 MB/sec Max ( PIO-4 ) 420 KB ( Read / Write ) 4200 7.1 286.1 Maximum 19,900 5.7 Maximum 12 1/2 2/ 3/ 4 Embedded sector servo © Copyright IBM Corp. 1998 9

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3.0
Drive Characteristics
This chapter provides the characteristics of the drives.
3.1
Logical Drive Format
The customer usable data capacity is as shown below.
3.2
Data Sheet
Figure 3. Drive Parameter
Descriptions
DBCA-203240
DBCA-204860
DBCA-206480
Logical Head Number
16
15
15
Logical Sectors/Track
63
63
63
Logical Cylinder Number
6304
10068
13424
Logical Sector Size
512
512
512
Total Customer Usable Data
Sectors
6 354 432
9 514 260
12 685 680
Total Customer Usable Data Bytes
3250 MB
3,253,469,184
4870 MB
4,871,301,120
6490 MB
6,495,068,160
Figure 4. Data Sheet
Media transfer rate [Mb/sec]
69.0 - 118.0
Interface transfer rate [MB/sec]
33.3 MB/sec Max
( Ultra DMA Mode-2 )
16.6 MB/sec Max
( PIO-4 )
Data buffer size [KB]
420 KB
( Read / Write )
Rotational speed [RPM]
4200
Average latency
[msec]
7.1
Recording density [Kbpi]
286.1 Maximum
Track density [TPI]
19,900
Areal density [Gb/sq.in.]
5.7 Maximum
Number of zone
12
Number of disks
1/2
Number of heads
2/3/4
Servo design method
Embedded sector servo
Copyright IBM Corp. 1998
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