Problem with unknown partition

[long2511mdd]

I downloaded Gparted Partition and saw that there was an unknown Partition
When I found out more, I knew that it is the Swap partition, and I have 2 Swap Partition:

fdisk -l

Disk /dev/sda: 320.1 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders, total 625142448 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x6e304e05

Device Boot Start End Blocks Id System
/dev/sda3 2048 385931263 192964608 7 HPFS/NTFS/exFAT
/dev/sda4 467855358 625141759 78643201 5 Extended
/dev/sda5 617144320 625141759 3998720 82 Linux swap / Solaris
/dev/sda6 467855360 613230591 72687616 83 Linux
/dev/sda7 613232640 617136127 1951744 82 Linux swap / Solaris


I do not know if I can delete one of these to have more free space.
Could you guys give me some advices?

[oldfred]

It looks like sda5 is about twice the size of sda7.

List UUIDs
# To clear cache and get new view:
sudo blkid -c /dev/null -o list


Then in fstab see which is used. Both may be used if both existed during install. Change UUID to the one you want to keep.
Then you'll have to edit fstab:
sudo cp /etc/fstab /etc/fstab.backup
gksu gedit /etc/fstab


to confirm there are no typos, run this. If it gives no error message it has remounted everything in fstab ok.
sudo mount -a

[long2511mdd]

There is just one swap partition during installation and it is on /dev/sd7. The other swap is still unknown and there is no information about the partition. This is what I recieved:
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/sda6 during installation
UUID=c3ae50a1-103c-4892-b306-8d390b991b96 / ext4 errors=remount-ro 0 1
# swap was on /dev/sda7 during installation
UUID=50ca4fbb-0663-4d0d-93f3-8fe2460dc43c none swap sw 0 0

usbfs /proc/bus/usb usbfs auto 0 0
none /proc/bus/usb usbfs devgid=46,devmode=644 0 0

I do not know about change UUID, what is that?

[darkod]

From fstab it seems you are not using sda5. It might be corrupted or something from earlier (or if you tried manipulating it from windows). It should be safe to delete it but you can't use it for much except to expand sda7 because sda5 physically is after sda7, so you can't expand sda6 to use it for example.

If you decide to delete it, do it from ubuntu not windows.