Flexible Disc Media Use; Introduction - HP 9130K Service Manual

1-4
General Information
8.37
(212.72)
~-----(l~~6)---
3.12
(79.37)
1.37
(34.92) SEE NOTE 3
*1.87*
*(47.62)*
1 4 - - - - - - - -
6.12(155.57) _ _
~I
~===~=====::::~~
*5.87(149.22)*
~
1 4 - - - 337
=]
(85.72)
NOTES:
I. DIMENSIONS GIVEN AS INCHES(MILLIMETRES).
2.
*
DENOTES DIFFERING TANDON DRIVE DIMENSIONS.
3. THIS DIMENSION FROM BACK OF FACEPLATE.
Figure 1-1: 9130K Physical Dimensions
Flexible Disc Media Use
Introduction
The storage medium used in the HP 9130K disc drive, is a flexible disc commonly called a
floppy. The flexible disc measures 133.4 mm (5.25 inches) in diameter and has a 27.5 mm
(1.125 inch) hole for alignment on the disc drive spindle. The disc is enclosed in a protective
plastic jacket with a slot for head access to the recording surface. Both sides of the flexible
disc are used for data storage.
By using flexible discs indentified as "double-sided", up to .25 megabytes of data can be
stored on each disc. Since some of the storage is used in subsystem overhead, the exact
amount available for user storage depends upon the controller subsystem. Refer to the
appropriate mainframe programming or reference manual for details. Double-sided flexible
discs (HP part number 92190A, package of ten) are available from HP's computer supplies
catalog, by calling the toll free order number 800-538-8787.
Each flexible disc must be initialized before it can be used for data storage. The initialization
procedure marks each disc track, checks for defective tracks, and may establish file director-
ies. Refer to the mainframe programming or reference manual for correct procedures.