This document describes how to create JFS file systems on floppy diskettes. This procedure is not supported. The procedure applies to all versions of AIX.
JFS file systems cannot be created on a tape device, for the following reasons:
Even if it were possible to create a file system on tape, the performance would be incredibly slow.
Creating JFS file systems on floppy diskettes is NOT SUPPORTED; however, the safeguards can be circumvented and a read-only JFS file system can be built on a floppy diskette and mounted. The reason that the file system will be read-only is that AIX cannot create a journal log on a diskette. Please keep in mind that this is not a supported procedure and that using it jeopardizes system stability.
To make the unsupported read-only JFS file system on a floppy diskette:
proto /directory > proto_filename
<noboot> 0 0
Save the file.
mkfs -p proto_filename -V jfs /dev/fd0
mount -r -V jfs /dev/fd0 /your_mount_point
WARNING: Do not eject the diskette without first unmounting it.
The fact that the file system is read-only may be a problem, but if you are
going to use it for utility programs and other data that does not change much,
it still may be useful. If you need to change the data, you can copy the
directory from the floppy into another directory, make your modifications, and
remake the file system using this procedure.
[ Doc Ref: 90605202514650 Publish Date: May. 19, 2000 4FAX Ref: 7460 ]