Missing partition in 'My Computer'

[Guest]

There are 2 hard drives installed. One has 2 partitions, a system (XP,NTFS)
and a data (NTFS). The second has 3 partitions, linux ext3, linux swap, and a
FAT32. After I did the install of linux on the second disk, the data
partition on the first disk has gone missing. It worked previously prior to
the linux installation and in disk management it says the partition is
"healthy (unkown)". The only options available to this data partition is
"delete partition" and "help", everything else is greyed out. Lastly this
data partition can still be viewed in linux and the data on it is not
corrupted. Anyone have any ideas on how to fix this?

 

[Pegasus \(MVP\)]

There are 2 hard drives installed. One has 2 partitions, a system (XP,NTFS)
and a data (NTFS). The second has 3 partitions, linux ext3, linux swap, and a
FAT32. After I did the install of linux on the second disk, the data
partition on the first disk has gone missing. It worked previously prior to
the linux installation and in disk management it says the partition is
"healthy (unkown)". The only options available to this data partition is
"delete partition" and "help", everything else is greyed out. Lastly this
data partition can still be viewed in linux and the data on it is not
corrupted. Anyone have any ideas on how to fix this?

You could try this: Reboot the machine with a Win98 boot disk
(www.bootdisk.com), then run ptedit.exe
(ftp://ftp.symantec.com/public/english_us_canada/tools/pq/utilities/)
to set the partition type back to NTFS (primary or logical, as
required). The action is reversible if you make a note of the current
partition type.