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#21
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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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