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Problem with accessing a partition



 
 
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  #21  
Old May 22nd 10, 12:55 PM posted to microsoft.public.win98.disks.general
Steven Saunderson
External Usenet User
 
Posts: 37
Default Problem with accessing a partition

On Sat, 22 May 2010 04:19:01 -0700, Andrew
wrote:

More details!
a. I run the WinXP Home edition.
If you assign the active partition, Partition Magic hides automatically the
other primary partitions, as having 2 active would call for disaster.
Therefore lack of the letter. If I want to start WinXP, then I make its
partition active and Win98 is automatically starred.


This makes sense but it isn't really necessary. I used to setup disks
with two primary partitions (and an extended one) and install a backup
version of the OS on the second primary one. If the user got into big
problems I would change the bootable flag from the first to the second
and start the PC using the backup OS. Then I could fix the real OS in
the first partition and then restore the bootable flags so the PC ran
normally. It sounds like Partition Magic changes the type of the
partition (e.g. 0C to FF) to make it inaccessible. This shouldn't cause
a problem unless you want to access the disabled partition (e.g. to back
it up).

Partition info a
Win98se 0C (Hex) FAT32X
WinXP 1C FAT32X
Extended 0F Extended X
D: 0C FAT32
E: 0B FAT32


It looks like D: is FAT32X (type 0x0C) which is good. I don't like the
fact that E: is type 0x0B. Win98 IO.SYS has a problem when encountering
a mix of LBA and CHS volumes in the extended partition.

Can you change the type of D: from 0x0B to 0x0C ? I think this will fix
the problem. If you can't then please check
http://home.exetel.com.au/~phelum/w98.htm to read about my fix for
Win98 IO.SYS.

Cheers,
--
Steven
  #22  
Old May 22nd 10, 01:08 PM posted to microsoft.public.win98.disks.general
Steven Saunderson
External Usenet User
 
Posts: 37
Default Problem with accessing a partition

On Sat, 22 May 2010 21:55:48 +1000, Steven Saunderson
wrote:

Can you change the type of D: from 0x0B to 0x0C ?


Oops, that should be change the type of E: from 0x0B to 0x0C.

Cheers,
--
Steven
  #23  
Old May 22nd 10, 01:08 PM posted to microsoft.public.win98.disks.general
Steven Saunderson
External Usenet User
 
Posts: 37
Default Problem with accessing a partition

On Sat, 22 May 2010 21:55:48 +1000, Steven Saunderson
wrote:

Can you change the type of D: from 0x0B to 0x0C ?


Oops, that should be change the type of E: from 0x0B to 0x0C.

Cheers,
--
Steven
  #24  
Old May 22nd 10, 05:44 PM posted to microsoft.public.win98.disks.general
Andrew[_2_]
External Usenet User
 
Posts: 35
Default Problem with accessing a partition

Thanks for your comments and hints.
I'm afraid that it's impossible to make such a conversion in Partition Magic.
I have to apologize for informing you incorrectly about the D: partition.
In fact, both the D: and E: partitions are 0B (Hex).

Regards,
Andrew

"Steven Saunderson" wrote:

On Sat, 22 May 2010 04:19:01 -0700, Andrew
wrote:

More details!
a. I run the WinXP Home edition.
If you assign the active partition, Partition Magic hides automatically the
other primary partitions, as having 2 active would call for disaster.
Therefore lack of the letter. If I want to start WinXP, then I make its
partition active and Win98 is automatically starred.


This makes sense but it isn't really necessary. I used to setup disks
with two primary partitions (and an extended one) and install a backup
version of the OS on the second primary one. If the user got into big
problems I would change the bootable flag from the first to the second
and start the PC using the backup OS. Then I could fix the real OS in
the first partition and then restore the bootable flags so the PC ran
normally. It sounds like Partition Magic changes the type of the
partition (e.g. 0C to FF) to make it inaccessible. This shouldn't cause
a problem unless you want to access the disabled partition (e.g. to back
it up).

Partition info a
Win98se 0C (Hex) FAT32X
WinXP 1C FAT32X
Extended 0F Extended X
D: 0C FAT32
E: 0B FAT32


It looks like D: is FAT32X (type 0x0C) which is good. I don't like the
fact that E: is type 0x0B. Win98 IO.SYS has a problem when encountering
a mix of LBA and CHS volumes in the extended partition.

Can you change the type of D: from 0x0B to 0x0C ? I think this will fix
the problem. If you can't then please check
http://home.exetel.com.au/~phelum/w98.htm to read about my fix for
Win98 IO.SYS.

Cheers,
--
Steven
.

  #25  
Old May 22nd 10, 05:44 PM posted to microsoft.public.win98.disks.general
Andrew[_2_]
External Usenet User
 
Posts: 35
Default Problem with accessing a partition

Thanks for your comments and hints.
I'm afraid that it's impossible to make such a conversion in Partition Magic.
I have to apologize for informing you incorrectly about the D: partition.
In fact, both the D: and E: partitions are 0B (Hex).

Regards,
Andrew

"Steven Saunderson" wrote:

On Sat, 22 May 2010 04:19:01 -0700, Andrew
wrote:

More details!
a. I run the WinXP Home edition.
If you assign the active partition, Partition Magic hides automatically the
other primary partitions, as having 2 active would call for disaster.
Therefore lack of the letter. If I want to start WinXP, then I make its
partition active and Win98 is automatically starred.


This makes sense but it isn't really necessary. I used to setup disks
with two primary partitions (and an extended one) and install a backup
version of the OS on the second primary one. If the user got into big
problems I would change the bootable flag from the first to the second
and start the PC using the backup OS. Then I could fix the real OS in
the first partition and then restore the bootable flags so the PC ran
normally. It sounds like Partition Magic changes the type of the
partition (e.g. 0C to FF) to make it inaccessible. This shouldn't cause
a problem unless you want to access the disabled partition (e.g. to back
it up).

Partition info a
Win98se 0C (Hex) FAT32X
WinXP 1C FAT32X
Extended 0F Extended X
D: 0C FAT32
E: 0B FAT32


It looks like D: is FAT32X (type 0x0C) which is good. I don't like the
fact that E: is type 0x0B. Win98 IO.SYS has a problem when encountering
a mix of LBA and CHS volumes in the extended partition.

Can you change the type of D: from 0x0B to 0x0C ? I think this will fix
the problem. If you can't then please check
http://home.exetel.com.au/~phelum/w98.htm to read about my fix for
Win98 IO.SYS.

Cheers,
--
Steven
.

  #26  
Old May 22nd 10, 07:45 PM posted to microsoft.public.win98.disks.general
Steven Saunderson
External Usenet User
 
Posts: 37
Default Problem with accessing a partition

On Sat, 22 May 2010 09:44:07 -0700, Andrew
wrote:

Thanks for your comments and hints.
I'm afraid that it's impossible to make such a conversion in Partition Magic.
I have to apologize for informing you incorrectly about the D: partition.
In fact, both the D: and E: partitions are 0B (Hex).


This sounds like a manifestation of the IO.SYS bug I mentioned. You
have CHS partitions in an LBA type extended partition. This is not
necessarily invalid (although a bit silly) but in your case I'd say it
is actually wrong because they all exceed the 8.4GB barrier.

You could try either a modified IO.SYS or use a disk editor program to
change the partition types from 0x0B to 0x0C.

Cheers,
--
Steven
  #27  
Old May 22nd 10, 07:45 PM posted to microsoft.public.win98.disks.general
Steven Saunderson
External Usenet User
 
Posts: 37
Default Problem with accessing a partition

On Sat, 22 May 2010 09:44:07 -0700, Andrew
wrote:

Thanks for your comments and hints.
I'm afraid that it's impossible to make such a conversion in Partition Magic.
I have to apologize for informing you incorrectly about the D: partition.
In fact, both the D: and E: partitions are 0B (Hex).


This sounds like a manifestation of the IO.SYS bug I mentioned. You
have CHS partitions in an LBA type extended partition. This is not
necessarily invalid (although a bit silly) but in your case I'd say it
is actually wrong because they all exceed the 8.4GB barrier.

You could try either a modified IO.SYS or use a disk editor program to
change the partition types from 0x0B to 0x0C.

Cheers,
--
Steven
  #28  
Old May 27th 10, 09:11 PM posted to microsoft.public.win98.disks.general
Andrew[_2_]
External Usenet User
 
Posts: 35
Default Problem with accessing a partition

While browsing the Partition Magic installation CD-ROM, I found extra
utilities on it. One of them was the ptedit32.exe, i.e., Partition Table
Editor v1.1 of 2002. The nice thing about this editor is that it is still
downloadable from the Internet and its interface is in plain English.

I used it to change my 0Bs to 0Cs, but I failed. To be more precise, I was
able to make such changes with this utility and save them (they even were in
place after rebooting the computer), but everything returned to the previous
situation, as soon, as I opened Partition Magic.

Although your reasoning about my logical partitions seems to be OK, there is
probably another limitation or maybe a deficiency of Partition Magic, which
doesn't allow it. By the way, I found on the Internet an another example of
the similar situation with 2 logical 0B partitions within the ExtenedX
partition (cf. www.goodells.net.multiboot.ptedit.htm).

I'm sure that I didn't make any mistake, so simple this interface was.
Its starting screen displays the master boot sector and master partition
table with its 4 entries and their types (in my case: 1C, 0C, 0F and 00 for
the Win98, WinXP, Extended and Unallocated partitions, respectively).
Clicking on 'Boot Record', displays all the boot record details of the
particular partitions.
Consecutive use of the 'Goto EPBR' option moves to the Extended partition
table with my chained logical volumes as the first entries.
Finally, the 'Set Type' option allows to change the partition type.
I would be grateful for your comments, if the above description is useful
somehow.

Regards,
Andrew


"Steven Saunderson" wrote:

On Sat, 22 May 2010 09:44:07 -0700, Andrew
wrote:

Thanks for your comments and hints.
I'm afraid that it's impossible to make such a conversion in Partition Magic.
I have to apologize for informing you incorrectly about the D: partition.
In fact, both the D: and E: partitions are 0B (Hex).


This sounds like a manifestation of the IO.SYS bug I mentioned. You
have CHS partitions in an LBA type extended partition. This is not
necessarily invalid (although a bit silly) but in your case I'd say it
is actually wrong because they all exceed the 8.4GB barrier.

You could try either a modified IO.SYS or use a disk editor program to
change the partition types from 0x0B to 0x0C.

Cheers,
--
Steven
.

  #29  
Old May 27th 10, 09:11 PM posted to microsoft.public.win98.disks.general
Andrew[_2_]
External Usenet User
 
Posts: 35
Default Problem with accessing a partition

While browsing the Partition Magic installation CD-ROM, I found extra
utilities on it. One of them was the ptedit32.exe, i.e., Partition Table
Editor v1.1 of 2002. The nice thing about this editor is that it is still
downloadable from the Internet and its interface is in plain English.

I used it to change my 0Bs to 0Cs, but I failed. To be more precise, I was
able to make such changes with this utility and save them (they even were in
place after rebooting the computer), but everything returned to the previous
situation, as soon, as I opened Partition Magic.

Although your reasoning about my logical partitions seems to be OK, there is
probably another limitation or maybe a deficiency of Partition Magic, which
doesn't allow it. By the way, I found on the Internet an another example of
the similar situation with 2 logical 0B partitions within the ExtenedX
partition (cf. www.goodells.net.multiboot.ptedit.htm).

I'm sure that I didn't make any mistake, so simple this interface was.
Its starting screen displays the master boot sector and master partition
table with its 4 entries and their types (in my case: 1C, 0C, 0F and 00 for
the Win98, WinXP, Extended and Unallocated partitions, respectively).
Clicking on 'Boot Record', displays all the boot record details of the
particular partitions.
Consecutive use of the 'Goto EPBR' option moves to the Extended partition
table with my chained logical volumes as the first entries.
Finally, the 'Set Type' option allows to change the partition type.
I would be grateful for your comments, if the above description is useful
somehow.

Regards,
Andrew


"Steven Saunderson" wrote:

On Sat, 22 May 2010 09:44:07 -0700, Andrew
wrote:

Thanks for your comments and hints.
I'm afraid that it's impossible to make such a conversion in Partition Magic.
I have to apologize for informing you incorrectly about the D: partition.
In fact, both the D: and E: partitions are 0B (Hex).


This sounds like a manifestation of the IO.SYS bug I mentioned. You
have CHS partitions in an LBA type extended partition. This is not
necessarily invalid (although a bit silly) but in your case I'd say it
is actually wrong because they all exceed the 8.4GB barrier.

You could try either a modified IO.SYS or use a disk editor program to
change the partition types from 0x0B to 0x0C.

Cheers,
--
Steven
.

  #30  
Old May 28th 10, 06:30 AM posted to microsoft.public.win98.disks.general
Steven Saunderson
External Usenet User
 
Posts: 37
Default Problem with accessing a partition

On Thu, 27 May 2010 13:11:31 -0700, Andrew
wrote:

While browsing the Partition Magic installation CD-ROM, I found extra
utilities on it. One of them was the ptedit32.exe, i.e., Partition Table
Editor v1.1 of 2002. The nice thing about this editor is that it is still
downloadable from the Internet and its interface is in plain English.

I used it to change my 0Bs to 0Cs, but I failed. To be more precise, I was
able to make such changes with this utility and save them (they even were in
place after rebooting the computer), but everything returned to the previous
situation, as soon, as I opened Partition Magic.


A simple test here might show whether we're on the right track. Use
Partition Magic to make your Win98 system partition active and then use
ptedit.exe (I assume you boot using a DOS floppy to use ptedit) to
change the partition types from 0B to 0C. Then you could start Win98
and see if it can see the partitions properly and also that you have no
phantom drives in Explorer. Phantom drives have a drive letter but if
you try to view them in Explorer it will tell you the volume isn't
formatted. If the partitions don't appear then the problem is
elsewhere.

Although your reasoning about my logical partitions seems to be OK, there is
probably another limitation or maybe a deficiency of Partition Magic, which
doesn't allow it. By the way, I found on the Internet an another example of
the similar situation with 2 logical 0B partitions within the ExtenedX
partition (cf. www.goodells.net.multiboot.ptedit.htm).


The partition type code issue is a bit muddled due to historical
factors. Type 0x0B is FAT32 with CHS access and type 0x0C is FAT32 with
LBA access. I believe that Win98 respects this. But all versions of
Win NT always use LBA access. So XP doesn't care whether your
partitions are 0x0B or 0x0C; it always uses LBA. If I create a FAT32
volume in XP it always gets the 0x0B code even when it's past the 1024
cylinder boundary. So if Partition Magic does the same I wouldn't call
it a bug or even a deficiency. But it can cause problems with Win98
IO.SYS so it seems a bit silly to me.

So please try the ptedit test above and tell me if it helps. I think a
better long-term solution would be to make your system multiboot with
the Win98 system partition as the active partition. Then you could
select which O/S you want at boot time and not have to play with
changing the partition table. I think this can be done without mucking
up the drive letters in either O/S. Does this approach appeal to you ?

Cheers,
--
Steven
 




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