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Possible Compatibility Bug from Windows Format


From: Philip Ogletree
Subject: Possible Compatibility Bug from Windows Format
Date: Tue, 22 Nov 2005 15:32:28 -0800 (PST)

Hello,

I am sorry if this is the wrong place for this question. In fact, you may very well know about this problem.

I have been having trouble with a hard drive that was partitioned using Partition Magic under Win XP. It seems that Windows writes the geometry of the hard drive onto the partition tables or boot sectors. Even if the values do not make any sense (see next paragraph).

The problem is that for hard drives larger than 8 GB, the LBA and CHS will never equal (they have to for smaller drives) and are not even used to compute the size of >8 GB drives. But it seems that Windows writes 240 or 255 heads to the Windows partitions. This causes Partition Magic and the Linux testdisk to report errors. Partition Magic gives an error “ that the LBA and CHS values must equal” and testdisk gives and error “hard drive appears to be formatted with 240 heads instead of 255". Linux ext3 partitions are fine.

I was just wondering, does parted intentionally follow the Windows error of writing the geometry to the partitions in order to assure compatibility or does parted write the files in such a way that I will not get the same errors if I use it instead of Partition Magic?

If I delete the FAT32 partitions and recreate them using parted will the errors listed above go away?

I am sorry if this isn’t a bug but I couldn’t find any other way to contact the only people who would know the answer to this question.

Thanks
Philip


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