My machine only has Ubuntu installed (13.04) but one data drive is NTFS (because I didn't realize that the disk was NTFS formatted when I started using it). I now used Gparted to reduce the partition and make room for a new data partition in ext4 format so that I can move the data there instead, then delete the NTFS partition and resize the ext4 partition to use the entire disk.
After reducing the NTFS partition and creating the ext4 partition, Gparted now Gparted has an exclamation mark (top) and tells me this (bottom).
I'm asked to run Windows Checkdisk twice, but I don't have Windows installed and it's very tedious to pull the drive out of the computer and hunt down a Windows pc with SATA connectors. Is there any way for me to fix this, besides using Windows?
The NTFS data partition is not available until I've fixed it, so I can't read its data and copy it to the new ext4 partition. If I could just reliably read it, this problem might be irrelevant.
Final update and solution:
I can't accept either answer because the Linux tools could not resolve the problem. In the end, I booted my machine with a Windows 7 installation disk and started the repair/recovery function. In there, I could open a command prompt and run the
chkdsk /f which solved the problem 🙂
You do not need to install ntfsprogs, it is now part of the default ntfs-3g driver. And with some older versions of Ubuntu installing ntfsprogs installed the old version and uninstalled ntfs-3g.
On April 12, 2011 it was announced that Ntfsprogs project was merged with NTFS-3G http://en.wikipedia.org/wiki/Ntfsprogs
man ntfsprogs (from 12.04,so applies to newer versions also) The ntfsprogs are part of the ntfs-3g package which can be downloaded from: http://www.tuxera.com/community/
From synaptic: ntfsprogs Package to ease upgrading from older ntfsprogs packages to the new ntfs-3g package. This package can be purged at anytime once the ntfs-3g package has been installed.
The ntfsfix does minor repairs which may work but sets the chkdsk flag so if you reboot it runs it. And partitions with the chkdsk flag are usually not mounted with ntfs-3g to prevent further damage that chkdsk might not fix. But if not a bootable Windows then chkdsk will not be run. You need either a Windows repairCD or some of the third party tools may run chkdsk.
Third party chkdsk tools Also has chkdsk and some other Windows repairs in free version: http://www.partitionwizard.com/features.html May be able to run chkdsk from Hiren's boot CD. (mini xp.) Hiren's Boot CD, and do a chkdsk on the XP
EASEUS Partition Master http://www.partition-tool.com/personal.htm