Re: [9fans] exception / interrupt 14 again

Re: [9fans] exception / interrupt 14 again

[Russ Cox]

> On a side note the Plan9 partition utility seemed to corrupt the partition
> directly behind it.  I also ran into a similar error with the 3rd edition
> where it calculated the size wrong by 1 or something.  Looks like I may have
> to dedicate a whole machine to make it go.

If someone can give me information about what exactly
is going wrong, I would love to fix this.  I suspect that
our LBA counts are fine and the imaginary C/H/S addresses
for partitions past what C/H/S can address somehow aren't
kosher.

Thanks.
Russ

Re: [9fans] exception / interrupt 14 again

[Don]

I get this same prob on any laptop I load
the boot floppy on that lacks a hdd.
Don

Re: [9fans] exception / interrupt 14 again

[rsc]

> Thanks, also, to whom ever hacked
> a blank disk check into the installation utility.

I'm curious: what do you mean by blank disk check?

Russ

Re: [9fans] exception / interrupt 14 again

[Don]

> I'm curious: what do you mean by blank disk check?
>
I'm taking the words right out of the installation utility. There
is a check just before partdisk that evidently scans the hard disk
for its mbr. If there is no mbr it prompts the user to install a
new mbr assuming that the disk is completely blank. Since my disk's
first few blocks were completely mangled in a crash the installation
utility assumed the mbr didn't exist. Yay for me cuz now the disk
works again.
Don

Re: [9fans] exception / interrupt 14 again

[Russ Cox]

> 2 thinkpads (760L and 600E) and a Compaq Armada 7770DMT

i'm curious to see what their apm lines say
at boot time, just to see what interesting bits
of code were being incremented on those machines.
the new disk should fix them.  let me know if it doesn't.

russ

Re: [9fans] exception / interrupt 14 again

[Don]

rsc@plan9.bell-labs.com (Russ Cox) wrote in message news:<0c3670567a15812a9148a1081deb41e3@plan9.bell-labs.com>...
> > 2 thinkpads (760L and 600E) and a Compaq Armada 7770DMT
Everything is cool now. All three laptops boot fine with or
without hard disks. Thanks! Thanks, also, to whom ever hacked
a blank disk check into the installation utility. That was an
easy fix for my hdd that crashed trying out a 9fs system.
Don

Re: [9fans] exception / interrupt 14 again

[Woodruff, Richard]

In the partition dump I sent this bit was informational not an error (so it
would seem from a brief google search that I did, see
http://www.ata-atapi.com/hiwchs.htm ).  I do have an older dump which does
report errors when I tried to install on a partition which was to small
(included below).  I suspect some error may be tracked from that info.  My
skimming of that site seems to indicate that calculations of C/H/S are not
as standard as one would hope, and the safe way might be to use the bios
call (a thought from the hip based on a 5 minute skim).

Regards,

Richard W.

===================================================================== Disk
1:  2482 Cylinders, 255 Heads, 63 Sectors/Track. The BIOS supports INT 13h
extensions for this drive. ========================== Partition Tables
========================= Partition        -----Begin----    ------End-----
Start     Num Sector    # Boot  Cyl Head Sect FS  Cyl Head Sect   Sect
Sects --------- - ---- ---- ---- ---- -- ---- ---- ---- --------- ---------
0 0 80      0    1    1 07 1023  254   63        63  39873267 Info: End
C,H,S values were large drive placeholders.   Actual values are:         0 0
80      0    1    1 07 2481  254   63        63  39873267         0 1 00
1023  254   63 39 1023  254   63  39873330      9198 Info: Begin C,H,S
values were large drive placeholders. Info: End C,H,S values were large
drive placeholders.   Actual values are:         0 1 00   2482    0    1 39
2482  145   63  39873330      9198 Error #107: Partition begins after end of
disk.   ucBeginCylinder (2482) must be less than 2482. Error #109: Partition
ends after end of disk.   ucEndCylinder (2482) must be less than 2482. Info:
Partition didn't end on cylinder boundary.   ucEndHead expected to be 254,
not 145.
============================================================================
==
Disk 1:  19469.4 Megabytes
============================ Partition Information
===========================
Volume        Partition                        Partition       Start
Total
Letter:Label  Type            Status   Size MB Sector    #    Sector
Sectors
------------- --------------- -------- ------- --------- - ---------
---------
              NTFS            Pri,Boot 19469.4         0 0        63
39873267               Type 39         Pri          4.5         0 1
39873330      9198
========================================================================
Boot Sector for drive *:  (Drive 1,  Starting Sector: 63, Type: NTFS
======================================================================== 1.
Jump:                    EB 52 90 2. OEM Name:                NTFS     3.
Bytes Per Sector:        512 4. Sectors Per Cluster:     8 5. Reserved
Sectors:        0 6. Number of FAT's:         0 7. Root Dir Entries:
0 8. Total Sectors:           0  (0x0) 9. Media Descriptor:        0xF8 10.
Sectors Per FAT:        0 11. Sectors Per Track:      63  (0x3F) 12. Number
of Heads:        255  (0xFF) 13. Hidden Sectors:         63  (0x3F) 14. Big
Total Sectors:      0  (0x0) 15. Unused:                 0x80 0x00 0x80 0x00
16. Total NTFS Sectors:     39873266  (0x2606AF2) 17. MFT Start Cluster:
4  (0x4) 18. MFT Mirror Start Clust: 2492079  (0x2606AF) 19. Clusters per
FRS:       246 20. Clusters per Index Blk: 1 21. Serial Number:
0xC8F0F069F0F05F5E 22. Checksum:               0x00000000 23. Boot
Signature:         0xAA55

Re: [9fans] exception / interrupt 14 again

[Russ Cox]

Did Partition Magic actually say that these values were wrong?
The cylinder number was 1023 because that's the largest one
you can write.  It is the "large drive placeholder" which
really means "there's no C/H/S-expressible address; use the
LBA".  Unless they have found somewhere to put two more bits
of C.  Sigh.  I wish this were documented _somewhere_.

Russ

Re: [9fans] exception / interrupt 14 again

[Woodruff, Richard]

Russ,

So I did get 4th edition running on my target PC.  In my case I just let
Plan9 have the rest of the disk, instead of having another partition behind
it.  I did run a utility on the disk which reports that the Cylinder value
used presumably calculated and set from Plan9 was wrong.  My tool said that
the number of cylinders should be 2481, while the value written in was 1023.
I haven't looked into the code to see if this was the problem or not, but I
suspect it could contribute if I really tried to use an adjacent partition.
I've included the disk information below.

Regards,

Richard W.


Partition Information Program
Oct 09 2000 - DOS32 Version
Copyright (c) 1994-2000, PowerQuest Corporation
Permission is granted for this utility to be freely copied so long
as it is not modified in any way.  All other rights are reserved.

PowerQuest, makers of PartitionMagic(r), Drive Image(tm) and DriveCopy(tm),
can be reached at
  Voice: 801-226-6834   Web site: http://support.powerquest.com
  Fax:   801-226-8941   Email:    help@powerquest.com
 ===================================================================== Disk
1:  2482 Cylinders, 255 Heads, 63 Sectors/Track. The BIOS supports INT 13h
extensions for this drive. ========================== Partition Tables
========================= Partition        -----Begin----    ------End-----
Start     Num Sector    # Boot  Cyl Head Sect FS  Cyl Head Sect   Sect
Sects --------- - ---- ---- ---- ---- -- ---- ---- ---- --------- ---------
0 0 80      0    1    1 07  990  254   63        63  15920352         0 1 00
991    0    1 39 1023  254   63  15920415  23952915 Info: End C,H,S values
were large drive placeholders.   Actual values are:         0 1 00    991
0    1 39 2481  254   63  15920415  23952915
============================================================================
==
Disk 1:  19469.4 Megabytes
============================ Partition Information
===========================
Volume        Partition                        Partition       Start
Total
Letter:Label  Type            Status   Size MB Sector    #    Sector
Sectors
------------- --------------- -------- ------- --------- - ---------
---------
              NTFS            Pri,Boot  7773.6         0 0        63
15920352               Type 39         Pri      11695.8         0 1
15920415  23952915
========================================================================
Boot Sector for drive *:  (Drive 1,  Starting Sector: 63, Type: NTFS
======================================================================== 1.
Jump:                    EB 52 90 2. OEM Name:                NTFS     3.
Bytes Per Sector:        512 4. Sectors Per Cluster:     8 5. Reserved
Sectors:        0 6. Number of FAT's:         0 7. Root Dir Entries:
0 8. Total Sectors:           0  (0x0) 9. Media Descriptor:        0xF8 10.
Sectors Per FAT:        0 11. Sectors Per Track:      63  (0x3F) 12. Number
of Heads:        255  (0xFF) 13. Hidden Sectors:         63  (0x3F) 14. Big
Total Sectors:      0  (0x0) 15. Unused:                 0x80 0x00 0x80 0x00
16. Total NTFS Sectors:     15920351  (0xF2ECDF) 17. MFT Start Cluster:
4  (0x4) 18. MFT Mirror Start Clust: 265200  (0x40BF0) 19. Clusters per FRS:
246 20. Clusters per Index Blk: 1 21. Serial Number:
0xC8F0F069F0F05F5E 22. Checksum:               0x00000000 23. Boot
Signature:         0xAA55

"Russ Cox" <rsc@plan9.bell-labs.com> wrote in message
news:<e7253db4937a9021cc5934369f230832@plan9.bell-labs.com>...
> > On a side note the Plan9 partition utility seemed to corrupt the
partition
> > directly behind it.  I also ran into a similar error with the 3rd
edition
> > where it calculated the size wrong by 1 or something.  Looks like I may
have
> > to dedicate a whole machine to make it go.
>
> If someone can give me information about what exactly
> is going wrong, I would love to fix this.  I suspect that
> our LBA counts are fine and the imaginary C/H/S addresses
> for partitions past what C/H/S can address somehow aren't
> kosher.
>
> Thanks.
> Russ

Re: [9fans] exception / interrupt 14 again

[Russ Cox]

> I get this same prob on any laptop I load
> the boot floppy on that lacks a hdd.

how many such laptops do you have?
what kind of laptops?

i would like very much to find a way
to reproduce this problem on a computer
that i can touch, and while i don't doubt
that your statement is true i do wonder
whether it is as general as you make it sound.

russ

Re: [9fans] exception / interrupt 14 again

[Don]

> how many such laptops do you have?
3

> what kind of laptops?
2 thinkpads (760L and 600E) and a Compaq Armada 7770DMT

> i would like very much to find a way
> to reproduce this problem on a computer
> that i can touch, and while i don't doubt
> that your statement is true i do wonder
> whether it is as general as you make it sound.
I don't take offence. If it was me I'd want
to ask the same questions when researching a
bug. Its only proper :)

As a side note all three of these machines had no
trouble booting 3e and the Compaq was actually my
most stable 3e terminal.
Don

Re: [9fans] exception / interrupt 14 again

[Woodruff, Richard]

I got this same exception when trying to use 4th edition on my Dell Optiplex
GX300 (NTFS is on its first primary partition).  I originally used Partition
Magic to set up a FAT partition to put the install image in (as the 4th
edition didn't seem to be able to look into the NTFS partition).  After
adding a FAT partition and the install image, I got the "panic:
exception/interrupt 14" error.  When I removed this partition and put the
distribution on a CD I was able to go through the Entire install
procedure....Unfortunately, when it boots and I try an log in as a user it
now just streams the error message "wrenwrite failed: io/error".

On a side note the Plan9 partition utility seemed to corrupt the partition
directly behind it.  I also ran into a similar error with the 3rd edition
where it calculated the size wrong by 1 or something.  Looks like I may have
to dedicate a whole machine to make it go.

Regards,

Richard W.

"Artem Letko" <aletko@iname.com> wrote in message
news:<000d01c1f561$60105340$1c742544@rosele01.nj.comcast.net>...
> got one. can reproduce 100%. tried different floppies. very similar to
what
> kazumi iwane (kiwane@dream.com) reported on ?/12/2001. the machine was
> booting/working fine under r3.
>
> PBS... Plan 9 from Bell Labs
> ELCR: 8C80
> apm ax=f000 cx=f000 dx=0 di=1200 ebx=57a0 esi=c03e6
> using fd0!dos!plan9.ini
> dev A0 port 1F0 config 0C5A capabilities 2F00 mwdma 0007 udma 043F
> pcirouting: 8086/7112 at pin 4 irq 7
> found 9PCFLOP .GZ attr 0x0 start 0xf0 len 1168843
> .FLAGS=10246 TRAP=e ECODE=0 PC=80015b87
> AX a48003b7 BX 8003b784 CX 00000800 DX 00000000
> SI 8002dcc0 DI 8003b7a4 BP 8003b780
> CS 0010 DS 0008 ES 0008 FS 0008 CS 0008
> CR0 80000011 CR2 a48003b9 CR3 0000c000
> panic: exception/interrupt 14
>
>
> Art.
>

Re: [9fans] exception / interrupt 14 again

[Joel Salomon]

r-woodruff2@ti.com (Woodruff, Richard) wrote in message news:<FD2AC9A020DDD51194710008C7089B20017F9DAF@dlee17.itg.ti.com>...
> On a side note the Plan9 partition utility seemed to corrupt the partition
> directly behind it.  I also ran into a similar error with the 3rd edition
> where it calculated the size wrong by 1 or something.  Looks like I may have
> to dedicate a whole machine to make it go.

To avoid that problem the second time I re-installed _everything_
(win98, linux, freebsd, & plan9) on my quadruple boot machine, when
installing linux and using fdisk, I created a plan 9 partition ( type
0x39 if memory serves me right, don't rely on it until the number's
been confirmed). This partition was not formated, of course, linux
can't mkfs a plan 9 fs, but space was allocated - correctly sized.
Plan 9 installation had no problem using this partition.

Hope this helps,
Joel

[9fans] exception / interrupt 14 again

[Artem Letko]

got one. can reproduce 100%. tried different floppies. very similar to what
kazumi iwane (kiwane@dream.com) reported on ?/12/2001. the machine was
booting/working fine under r3.

PBS... Plan 9 from Bell Labs
ELCR: 8C80
apm ax=f000 cx=f000 dx=0 di=1200 ebx=57a0 esi=c03e6
using fd0!dos!plan9.ini
dev A0 port 1F0 config 0C5A capabilities 2F00 mwdma 0007 udma 043F
pcirouting: 8086/7112 at pin 4 irq 7
found 9PCFLOP .GZ attr 0x0 start 0xf0 len 1168843
...FLAGS=10246 TRAP=e ECODE=0 PC=80015b87
AX a48003b7 BX 8003b784 CX 00000800 DX 00000000
SI 8002dcc0 DI 8003b7a4 BP 8003b780
CS 0010 DS 0008 ES 0008 FS 0008 CS 0008
CR0 80000011 CR2 a48003b9 CR3 0000c000
panic: exception/interrupt 14


Art.