brown@nicmad.UUCP (04/29/86)
[How I love these mods that make things incompatible!!!!]
Here is one for you PC experts out there. I dig into a few things of this
machine, this this has stumped me. :-(
I was running two 10MB hard disks, with the mod to make them 2K clusters.
When I started up PC-DOS 3.20 from diskette, I couldn't read the hard
disks. It was as if the hard disk was being seen as 4K clusters, etc.
Well, to make a long story short, I backed up and reformated the hard disks.
The format let the drives be 2K in cluster size. But now 3.20 understands
the drives, and if I start up 3.10 from diskette, it can't read the drives.
I then downloaded the INFO.EXE program from 'PC Tech Journal', which lets
me display the parameters of the hard drive. Since the program was written
for 2.00 through 3.10 DOS, I had to change the one byte in the code to let
it see PC-DOS 3.20 (I don't have the Microsoft C Compiler). When I run
INFO on the hard drive, with 3.20, everything is as expected. But, when I
run INFO on the hard drive, with 3.10, I get:
FAT entries are 12 bits, instead of 16;
Cluster size is 4096, instead of 2048;
Hidden from DOS: 3 sectors, instead of 1;
FAT: 16 sectors, instead of 21
The following is the partition table:
Partition 1 through 3 is zero
Partition 4: 80 00 02 00 04 03 51 30 01 00 00 00 03 51 00 00
The following is the DOS partition's boot record:
EB 34 90 49 42 4D 20 20 33 2E 32 00 02 04 01 00 02 00 02 03 51
F8 15 00 11 00 04 00 01 00
I don't have the partition or boot record from DOS 3.10. I destroyed them
before I really knew what I was doing.
So, what I am asking is does anyone understand why different versions of PC-DOS
does not understand the other version's format of the hard disk (modified)?
Does it have anything to do with booting up on floppy? Any ideas would be a
help is understanding what this thing is doing.
Thanks in advance.
--
ihnp4------\
harvard-\ \
Mr. Video seismo!uwvax!nicmad!brown
topaz-/ /
decvax------/iav1917@ritcv.UUCP (alan i. vymetalik) (05/01/86)
[The sign: "Wanted: Line Eater, low visibility, 2 yrs prof. exp. req."] In article <668@nicmad.UUCP> brown@nicmad.UUCP writes: > ... I then downloaded the INFO.EXE program from 'PC Tech Journal' ... Having not seen a copy of the 'PC Tech Journal' recently, I am curious in obtaining their BBS's telephone number. Also, is the BBS a private board or 'public domain' (whatever that is? :-) ). E-mail is appreciated but maybe the net would like to know also... Thanx in advance, Alan ------------------------------------------------------- When not downloading: Alan I. Vymetalik Bitnet: aiv1974@ritvaxd UUCP: iav1917@ritcv.UUCP Usenet: {allegra,seismo}!rochester!ritcv!iav1917 All standard disclaimers apply -------------------------------------------------------
brown@nicmad.UUCP (05/02/86)
In article <9680@ritcv.UUCP> iav1917@ritcv.UUCP (alan i. vymetalik) writes: > Having not seen a copy of the 'PC Tech Journal' recently, I am > curious in obtaining their BBS's telephone number. Also, is the > BBS a private board or 'public domain' (whatever that is? :-) ). The BBS number of PC Tech Journal is: (301) 576-PCTJ It isn't a public domain board, but anyone can call it. But I believe that anything that you download you can't put on another BBS. The copyright thing lets you get a copy, but you can't give it away generally. If you know others who also have the magazine, you can give them copies, personally. The board can be busy. It took me quite awhile to get in. -- ihnp4------\ harvard-\ \ Mr. Video seismo!uwvax!nicmad!brown topaz-/ / decvax------/