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I followed the instructions in this thread to create a new swap partition post-installation. My /var/tmp/fstab file currently has the following in it:

/host/ubuntu/disks/swap.disk    none    swap    sw      0       0    
UUID=4ef64da8-c637-43de-a389-8a059eb6c069 none   swap    sw      0       0

GParted gives this error message:

NTFS signature is missing.
Failed to mount 'dev/sda1': Invalid argument
The device '/dev/sda1' doesn't have a valid NTFS.
Maybe you selected the wrong device? Or the whole disk instead of a partition? Or the
other way around? 

statvfs (): No such file or directory
Unable to read the contents of this file system!
Because of this some partitions may be unavailable.

Please help!

Other GParted stats:
File system: ntfs
Size: 199.00 MiB
Flags: boot

Path: /dev/sda1
Status: Mounted on
UUID: 4ef64da8-c637-43de-a389-8a059eb6c069

UPDATE: I posted a follow-up question that includes the Boot-Repair pastebin readout.

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closed as too localized by jrg Dec 26 '12 at 1:56

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Unfortunately, computer has restarted and I am now getting a "Missing Operating System" message. All I am able to access are HP recovery tools for Windows (it's a dual-boot). Help would be appreciated! –  QuietThud Nov 14 '12 at 7:07
Are you sure /dev/sda1 is the swap partition? Usually, that would be a Windows 7 boot partition, and I'd not recommend messing with it. Can you add the output of sudo fdisk -l to the question, as well as sudo blkid. –  mikewhatever Nov 14 '12 at 7:07
@mikewhatever It does indeed seem to have been the Windows boot partition--what can I do now? –  QuietThud Nov 14 '12 at 7:08
In case you have accidentally formatted your Windows partition see askubuntu.com/questions/49497/ntfs-recovery-software-for-ubuntu and more for recovery (I recommend Testdisk). –  Takkat Nov 14 '12 at 7:19
Found this. Post #15 details the steps and the tools needed. –  mikewhatever Nov 14 '12 at 10:33