Re: HPOFS

Sir:

Hendrik Schmieder wrote: 
"William L. Hartzell" schrieb:

Sir:

I decided to see what can be done with this file system.  One can format
a floppy with it and have EA preserved.  But the usable free space on a
1.44 floppy is less than 1.25 MiB.  From a CLI I entered Format A:
/fs:hpofs.  Format can up and said the file system for the floppy is
FAT.  I crtl-C to exit and up arrowed to recall the command (command
history is enabled).  This time the format said the file system is
HPOFS.  I said Y to format and it immediately had an error with at trap
000d, Sys1811.  Again I up arrowed and answer Y and it formatted the
floppy to completion.  It created two boot areas and reserved space for
directories.  About 24 KiB was reserved.  I copied a pdf of just over 1
MiB in size to the floppy.  When it completed, I used the WPS and double
clicked upon the pdf to launch Acrobat4.  The file loaded fine in
Acrobat and was viewable.  So the file system is usable on floppies.

Next I tried to use it on DVD-Ram disk.  From the CLI I entered Format
S: /fs:hpofs.  Format came up and said the file system for the disk was
UDF.  I crtl-C to exit and up arrowed again.  This time format said the
file system for the disk was HPOFS.  It immediately sys1811, Trap 000D
and exit.  So I up arrowed again just as I done with the floppy, but
alas it continued to error out.  It did write the file system type to
the disk as chkdsk showed, but that was the end of chkdsk as it quit
with error.  So it not usable with optical disks this large.

So I tried a CD-RW disk to see if a smaller optical disk was usable.
Alas, this disk presented errors F058-format unsuccessful F080-failed
during read.  I tried another disk in case that one was defective, but
alas it failed also (same errors).  So HPOFS does not like this kind of
optical disk.

Next I tried a CD-R, with the same results as with CD-RW disk.  The IBM
technical documentation says that HPOFS is usable for worm devices.



None of the tested media are WORMs.


By defination a CD-R is a Write Once, Read Many media and as such is a WORM.
--
Bill
Thanks a Million!
.

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