On a 3TB Seagate Barracuda HDD, I had some free space which I wanted to allocate back to an NTFS partition. Using KDE Partition Manager I attempted to do so, and it's currently been running for over 21 hours and seems to be stuck at about 80%. The copy rate is excessively slow, at around 17 MiB/s (down from 43 MiB/s at the start which is still quite slow).
Is there anything I can do except wait it out for the extra 20 hours it will supposedly take? I've read that there's a very high chance of losing the entire disk if I cancel it, but at this rate I'm not convinced it's actually going to end as it keeps slowing down over time. I do have a backup but it only has important files (not the full disk) and isn't very recent, as I expected the operation to be relatively quick. The drive is also not a boot drive (just a storage one).
Here's the log from KDE Partition Manager:
Move partition ‘/dev/sdb2’ to the right by 250.00 GiB
Job: Check file system on partition ‘/dev/sdb2’
Command: ntfsresize --no-progress-bar --info --force --verbose /dev/sdb2
Check file system on partition ‘/dev/sdb2’: Success
Job: Set geometry of partition ‘/dev/sdb2’: Start sector: 524,322,816, length: 5,336,209,408
Command: sfdisk --force /dev/sdb -N 2
Set geometry of partition ‘/dev/sdb2’: Start sector: 524,322,816, length: 5,336,209,408: Success
Job: Move the file system on partition ‘/dev/sdb2’ to sector 524,322,816
Copying 260,557 blocks (2,732,139,216,896 bytes) from 2,732,145,508,352 to 3,000,582,012,928, direction: right.
Copying 40 MiB/second, estimated time left: 17:08:55
Copying 40 MiB/second, estimated time left: 16:03:44
Copying 41 MiB/second, estimated time left: 14:54:04
Copying 42 MiB/second, estimated time left: 13:45:32
Copying 42 MiB/second, estimated time left: 12:43:26
Copying 43 MiB/second, estimated time left: 11:43:29
Copying 43 MiB/second, estimated time left: 10:44:39
Copying 35 MiB/second, estimated time left: 12:06:04
Copying 28 MiB/second, estimated time left: 11:29:21
Copying 17 MiB/second, estimated time left: 20:53:24