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I want to resize my partitions: I have 3 partitions:

  • Ubuntu 10.04
  • Windows Seven
  • Ubuntu 11.10

It's booting with the boot installed by the Ubuntu 11.10 version.

I want to expand (only expand) all the 3 partitions.

My HD is 1,8 Tb so it's big and I have no possibility to save before expanding.

So my question is: if you tell me GParted work 99,99 % of the time, I'm willing to take the risk. If you tell me GParted work 90 % of the time, I won't take that risk.

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Get into a livecd, use gparted, make sure you do only that, resize and make it happen. –  Uri Herrera Jun 21 '12 at 6:39
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Last time I tried resizing a NTFS partition using Gparted, I lost all data in the drive. I could only make it usable after formatting the drive. I remember this happening both the times I resized the drive. –  jokerdino Jun 21 '12 at 6:55
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There is nothing as 99.99% guarantee. Sudden power failure can also cause you a big metal plate, with no uses. Also note that: As per my knowledge, All partitioning tools are dangerous. They always warn their users about that –  Anwar Shah Jun 21 '12 at 6:57
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If you have no way to backup and are worried about partition editing going wrong - then there is only one real answer for you. Don't do it. –  Elfy Jun 21 '12 at 6:59
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"Safe" ? Is a power drill "safe"? A saw? A claw hammer? rm ? It's a tool. A very effective tool -- which automatically means that if you don't know what you're doing it's not safe at all. –  Shadur Jun 21 '12 at 7:47
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5 Answers

up vote 6 down vote accepted

I personally did not have a problem. I resized my disks using gparted, ntfs and fat32 and ext4. About 8-10 times until now. It should be safe, otherwise you would see problems such as "gparted broke my disk" all around the web.

The way I see it, it wouldn't be in the ubuntu distribution if it wasn't doing its job 99%. It's a well-established program with a good programmer, well-maintained and supported regularly (by closing/fixing bugs). :)

Of course, if you are afraid of losing your data, you can always buy or ask from someone to lend you a hard drive, usb or sata, so that you can backup your important data first.

As mentioned in the comments, use a livecd with gparted (e.g. ubuntu 12.04 livecd), let it do its job and don't interfere. Also, don't do a lot of steps as a batch job (don't put a lot of stuff to do in the gparted queue). Do them one-by-one and hit apply.

There's only one risky situation, if the power goes down, as per Anwar's comment:

There is nothing as 99.99% guarantee. Sudden power failure can also cause you a big metal plate, with no uses. Also note that: As per my knowledge, All partitioning tools are dangerous. They always warn their users about that

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My experience with resizing partions in GParted in 100% positive. Some basic rules apply, as has been mentioned above:

  • Make sure you have backup. (That's always a basic rule, not just when you're resizing partions :-)).
  • Make sure your partitions are error free and unmounted cleanly. Specifically, on your dual-boot system, make sure Windows has been shut down correctly before you change anything on your partitions.
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I have partitioned and re-partitioned, edited and re-sized my Hard Drive numerous times with GParted and it has never failed me. As medigeek said there is no such thing as a guarantee in these programs.

You should always take a back-up of all valuable data to be on the safe side.

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I have used gparted safely on ext[234], fat32 and NTFS partitions. I guess from your question that you don't have any backup of your data, so you have accepted the risk of losing your data if a disk fails, you spill a cup of tea over it etc. In that case the additional risk caused by using gparted feels negligible.

If you can afford an external hard-drive I'd suggest you back up, not matter if you use gparted or not.

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Make sure you FIX all errors in the NTFS partition before you do the resizing, otherwise you could lose data in that partition. You can use the windows checkdisk tool to check and repair errors.

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