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Support => General Help & Advice => Topic started by: mikep on October 13, 2018, 11:59:37 pm

Title: Running defragfs
Post by: mikep on October 13, 2018, 11:59:37 pm
Hello Folks,

I've been trying to run defragfs with no success.

Basically, I downloaded it from sourceforge, unpacked it in filemanager, then copied defragfs to usr/bin in a terminal. When I try to run it (using sudo defragfs...) I get "command not found". Ls shows that defragfs does exist in usr/bin, although it's greyed out, so I'm assuming it's not properly unpacked. I tried "make defragfs" in the terminal but got "make: Nothing to be done for 'defragfs'".

Any suggestions welcome. Thanks.
Title: Re: Running defragfs
Post by: Mark Greaves (PCNetSpec) on October 14, 2018, 12:13:15 am
what's the output from
Code: [Select]
ls -l /usr/bin/defragfs

Though you do realise Linux filesystems don't really need defragmenting right ?
(caveat - at least they don't normally fragment unless your disk gets full, as the file system always attempts to write files contiguously)



Something else to note - If you have an SSD, because of the way blocks are written/read, you never need to defragment even in Windows (in fact it would be a bad thing to do as it would have zero effect on read times but would shorten the life of the SSD).
Title: Re: Running defragfs
Post by: mikep on October 14, 2018, 03:50:48 am
Here it is Mark,

mike@xubuntu:/usr/bin$ ls -l /usr/bin/defragfs
-rw-r--r-- 1 root root 10091 Oct 13 23:09 /usr/bin/defragfs

I know Linux filesystems don't usually need defragging, but this disk is nearly full and has been partitioned and dual-booted with Windows and chunters away at snail's pace, so I thought it worth a go. And no, it's not an SSD. in fact it's an old IDE drive. I'm about to swap in an SSD and do a nice fresh install of Xubuntu. The defrag is just an experiment really, and what bugs me is not being able to get it to run!
Title: Re: Running defragfs
Post by: Mark Greaves (PCNetSpec) on October 16, 2018, 12:29:30 am
from what I'm reading it defrags files .. not so much the entire drive.

But anyway, if you wanna give it a shot, the reason it's not working is the binary executable hasn't been marked as executable .. you can fix this by running:
Code: [Select]
sudo chmod +x /usr/bin/defragfs
Title: Re: Running defragfs
Post by: mikep on October 17, 2018, 11:05:57 pm
Thanks Mark,

Defragfs runs now, but I'm getting the following..

mike@xubuntu:/$ defragfs /dev/sda5
defragfs 1.1.1, Released under GPLv3 by John Robson <john.robson@usp.br>, March 2011 (help: $ defragfs / -h)

You must specify a correct directory name!


So I tried this..

mike@xubuntu:/$ cd /dev
mike@xubuntu:/dev$ cd /sda5
bash: cd: /sda5: No such file or directory

fdisk shows the following..

mike@xubuntu:/$ sudo fdisk -l
[sudo] password for mike:
Disk /dev/sda: 232.9 GiB, 250059350016 bytes, 488397168 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
Disklabel type: dos
Disk identifier: 0x42414240

Device     Boot     Start       End   Sectors   Size Id Type
/dev/sda1  *           63 122093999 122093937  58.2G  7 HPFS/NTFS/exFAT
/dev/sda2       122095614 488396799 366301186 174.7G  5 Extended
/dev/sda5       122095616 297876865 175781250  83.8G 83 Linux
/dev/sda6       480014336 488396799   8382464     4G 82 Linux swap / Solaris
/dev/sda7       297877504 480006143 182128640  86.9G 83 Linux

Partition table entries are not in disk order.


So fdisk sees /dev/sda5, but cd and defragfs don't. Duh? What am I missing?
 
Title: Re: Running defragfs
Post by: Mark Greaves (PCNetSpec) on October 18, 2018, 12:52:57 am
Sorry Mike, but I'm not happy providing help with a command I don't know much about that could potentially do damage.
Title: Re: Running defragfs
Post by: mikep on October 18, 2018, 03:33:18 am
OK Mark, that's fair enough. Thank you.

It's academic anyway, as I'll be replacing the disk with an SSD shortly.

Thanks for your input, as always.

M
Title: Re: Running defragfs
Post by: Mark Greaves (PCNetSpec) on October 18, 2018, 12:06:37 pm
You'll be glad you did .. but there's no going back to a spinner once you've tried an SSD :)
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