After resizing ext4-Partition many files disappeared

paulbrause · 2022-10-19 21:24:35

Hi,

after resizing one of my ext4-Partition Arch didn't booted any more.
I commented the Partition in /etc/fstab and the System booted.

I then mounted the Partition, but only a few files seems to be on the Partition.
But when i see how much space is left, it is still as much as before the resizing. It is like the files are still on the Disk, but are not shown anymore.
I guess, the Filesystem might be broken?

I unmounted the Partition and created an Image (dd if=/dev/sdc4/ of=/home/paulbrause/sdc4.img).

Is there a chance to recover these files?
I have backuped nearly all of the files, but (of course) not everything.

Thank you in advance,
Christian

Last edited by paulbrause (2022-10-19 21:25:54)

teckk · 2022-10-19 21:38:15

Which way did you resize it. The end of the partition or the start? If you shrank it, did you shrink the file system first, and then the partition. Or if you made it larger, did you expand the partition and then expand the file system into that space? And, you resized it without it being mounted? Not while it was being written to? Etc.

Is there a chance to recover these files?

Always a good idea to backup first before a partition resize.

Show what you did.

paulbrause · 2022-10-19 21:46:21

I resized it with gparted.

The partition is the last one of three on the disk. I deleted the middle one (was NTFS), created a new partition with ext4, but a smaller one.
The "rest" of the free space i used for the "crashed" partition.
So yes, i expanded the partition.

It was not mounted while resizing.

cfr · 2022-10-19 22:36:33

So the start of the partition was moved rather than the end?

What did you do after resizing the partition? How did you resize the filesystem?

paulbrause · 2022-10-20 11:32:16

Yes, the start of the partition was moved.

I did resize the partition with geparted. There was no error and after that i restart my PC.

seth · 2022-10-20 12:57:19

How did you resize the filesystem?

fdisk -l
lsblk -f
df -h

paulbrause · 2022-10-21 16:39:51

fdisk -l

Festplatte /dev/sdc: 2,73 TiB, 3000592982016 Bytes, 5860533168 Sektoren
Festplattenmodell: WDC WD30EZRX-00D
Einheiten: Sektoren von 1 * 512 = 512 Bytes
Sektorgröße (logisch/physikalisch): 512 Bytes / 4096 Bytes
E/A-Größe (minimal/optimal): 4096 Bytes / 4096 Bytes
Festplattenbezeichnungstyp: gpt
Festplattenbezeichner: DCF6F08D-F117-48B2-BEAF-64A0D155F240

Gerät          Anfang       Ende   Sektoren  Größe Typ
/dev/sdc1  2048002048 3670278143 1622276096 773,6G Linux-Dateisystem
/dev/sdc2        2048 2048002047 2048000000 976,6G Linux-Dateisystem
/dev/sdc4  3670278144 5860532223 2190254080     1T Microsoft Basisdaten

Partitionstabelleneinträge sind nicht in Festplatten-Reihenfolge.

lsblk -f

sdc                                                                            
├─sdc1 ext4   1.0          9c46cbcc-2578-4fcf-9c61-55f0beba984f  683,3G     5% /home/paulbrause/Timeshift
│                                                                              /mnt/timeshift
├─sdc2 ext4   1.0          b8eca612-a43a-43cd-83f3-1f9561234c62  427,8G    50% /home/paulbrause/Musik
│                                                                              /mnt/musik
└─sdc4 ext4   1.0          c950dc48-a278-40df-b5c3-5584b978ad34

df -h

Dateisystem    Größe Benutzt Verf. Verw% Eingehängt auf
dev             7,8G       0  7,8G    0% /dev
run             7,8G    1,8M  7,8G    1% /run
/dev/sdf1       885G    303G  537G   37% /
tmpfs           7,8G     66M  7,8G    1% /dev/shm
/dev/sda1       229G    8,8G  208G    5% /mnt/workspace
tmpfs           7,8G     31M  7,8G    1% /tmp
/dev/sde1        55G     12G   41G   23% /mnt/dropbox
/dev/sde2        55G     24K   52G    1% /mnt/syncthing
/dev/sdb2        96M     34M   63M   35% /boot/efi
/dev/sdc2       962G    485G  428G   54% /mnt/musik
/dev/sdd3       1,8T    1,4T  292G   83% /mnt/fotos
/dev/sdc1       761G     39G  684G    6% /mnt/timeshift
/dev/sdd1       480G     32K  456G    1% /mnt/arbeit
/dev/sdd2       480G    108M  456G    1% /mnt/daten
tmpfs           1,6G     88K  1,6G    1% /run/user/1000

(I have not mounted the partiton at this moment, so nothing's shown here. Should i repeat this with mounted drive?)

Hmmm, i see, that there is something wrong with the filesystem, because fdisk lists the partition as Microsoft filesystem, right?
But when i open gparted, the partition is shown as ext4.

V1del · 2022-10-21 16:47:12

You should repeat this with the file system mounted, the partition type is generally irrelevant and should have no bearing on this issue per se

paulbrause · 2022-10-21 16:52:26

fdisk -l

Festplatte /dev/sdc: 2,73 TiB, 3000592982016 Bytes, 5860533168 Sektoren
Festplattenmodell: WDC WD30EZRX-00D
Einheiten: Sektoren von 1 * 512 = 512 Bytes
Sektorgröße (logisch/physikalisch): 512 Bytes / 4096 Bytes
E/A-Größe (minimal/optimal): 4096 Bytes / 4096 Bytes
Festplattenbezeichnungstyp: gpt
Festplattenbezeichner: DCF6F08D-F117-48B2-BEAF-64A0D155F240

Gerät          Anfang       Ende   Sektoren  Größe Typ
/dev/sdc1  2048002048 3670278143 1622276096 773,6G Linux-Dateisystem
/dev/sdc2        2048 2048002047 2048000000 976,6G Linux-Dateisystem
/dev/sdc4  3670278144 5860532223 2190254080     1T Microsoft Basisdaten

Partitionstabelleneinträge sind nicht in Festplatten-Reihenfolge.

lsblk -f

sdc                                                                            
├─sdc1 ext4   1.0          9c46cbcc-2578-4fcf-9c61-55f0beba984f  683,3G     5% /home/paulbrause/Timeshift
│                                                                              /mnt/timeshift
├─sdc2 ext4   1.0          b8eca612-a43a-43cd-83f3-1f9561234c62  427,8G    50% /home/paulbrause/Musik
│                                                                              /mnt/musik
└─sdc4 ext4   1.0          c950dc48-a278-40df-b5c3-5584b978ad34       0    96% /home/paulbrause/Downloads
                                                                               /mnt/downloads

df -h

Dateisystem    Größe Benutzt Verf. Verw% Eingehängt auf
/dev/sdc4       1,1T    988G     0  100% /mnt/downloads

V1del · 2022-10-21 16:59:38

You're at 100% usage here... if you resized the file system to a size that can't actually contain what you intend to carry on it then that very much explains the symptoms.

Let's back up a bit, what size was the file system before your resize operation and what was your motivation for doing the resize? If you are confused about lacking a few ~100 GBs see https://wiki.archlinux.org/title/Ext4#B … node_ratio and https://wiki.archlinux.org/title/Ext4#Reserved_blocks

paulbrause · 2022-10-21 17:05:12

The usage before was at about 95%, i know.

But i expanded the partition, shouldn't i have now more free space?

Honestly i don't know, how big exactly the partition before was, i would guess around 800GB.
And my motivation was to increase the space on this partition.

Last edited by paulbrause (2022-10-21 17:06:20)

seth · 2022-10-21 19:03:26

Expanded to what?
Right now sdc4 is 1TB and has a 1TB filesystem.

The first partition is sdc2, sdc1 is right of that and sdc4 right behind that.
The three use up the entire device and the filesystem sizes match.

paulbrause · 2022-10-21 19:06:37

Expanded from ~800GB to 1TB.

sdc1 was >1TB NTFS-partition, i deleted this and created an smaller ext4-partititon and expanded sdc4 to this free space.

Sorry, but my english is not that good...

Last edited by paulbrause (2022-10-21 19:07:19)

seth · 2022-10-21 19:21:54

Well, yeah.
That's all good and fine, you're simply using up that space now.

https://archlinux.org/packages/community/x86_64/ncdu/ - but it's likely your porn folder

paulbrause · 2022-10-21 19:26:04

Haha, no, no porn.

ncdu shows, that only 11 GB are used.

ncdu 2.1.2 ~ Use the arrow keys to navigate, press ? for help
--- /run/media/paulbrause/c950dc48-a278-40df-b5c3-5584b978ad34 ---------
.  10.9 GiB [##########] /#MP3
   26.2 MiB [          ]  Teeth Saucer.zip
   24.0 MiB [          ]  Teeth Cup.zip
   22.9 MiB [          ]  shutterstock_1166416783.jpg
   20.0 MiB [          ]  shutterstock_594962792.jpg
   17.3 MiB [          ]  shutterstock_1183461973.jpg
   11.0 MiB [          ]  Stiftung Warentest Fi...Magazin No 03 2022.pdf
    7.3 MiB [          ]  Stiftung Warentest Fi...Magazin No 02 2022.pdf
    6.1 MiB [          ]  arno-pro.zip
    5.4 MiB [          ]  shutterstock_2067691046.eps
    5.3 MiB [          ]  shutterstock_1996677905.eps
    4.4 MiB [          ]  shutterstock_256067590.eps
    2.8 MiB [          ]  Vorgang81ecf39f-99ad-...-946f-5bd588e9c668.pdf
    2.6 MiB [          ]  shutterstock_256067590 [Konvertiert].ai
    2.4 MiB [          ]  2020-07-04.nmea
    2.4 MiB [          ]  2020-02-17.nmea
    2.3 MiB [          ]  2018-06-30.nmea
    2.2 MiB [          ]  2017-07-08.nmea
    2.2 MiB [          ]  2020-09-02.nmea
    2.2 MiB [          ]  2017-03-30.nmea
    2.1 MiB [          ]  2018-05-27.nmea
    2.0 MiB [          ]  2020-08-28.nmea
    2.0 MiB [          ]  2020-06-30.nmea
    2.0 MiB [          ]  2018-05-05.nmea
    2.0 MiB [          ]  2018-03-25.nmea
    1.9 MiB [          ]  gutschein-2012.pdf
    1.9 MiB [          ]  2021-07-15.nmea
    1.9 MiB [          ]  2018-05-13.nmea
    1.5 MiB [          ]  2017-06-24.nmea
    1.4 MiB [          ]  2020-08-22.nmea
    1.3 MiB [          ]  2020-08-29.nmea
    1.3 MiB [          ]  2017-09-05.nmea
    1.3 MiB [          ]  2020-08-23.nmea
    1.1 MiB [          ]  2020-08-25.nmea
  868.0 KiB [          ]  2020-08-27.nmea
  832.0 KiB [          ]  2017-05-21.nmea
  816.0 KiB [          ]  2020-08-24.nmea
  800.0 KiB [          ]  2018-02-25.nmea
  736.0 KiB [          ]  Headphone_Hook_2.1_-_Copy.STL
  732.0 KiB [          ]  2018-02-18.nmea
  732.0 KiB [          ]  2018-03-18.nmea
  700.0 KiB [          ]  2018-02-17.nmea
  660.0 KiB [          ]  2017-04-29.nmea
  476.0 KiB [          ]  pdf001.pdf
  468.0 KiB [          ]  napoli.pdf
  448.0 KiB [          ]  medal_maker_v2.stl
  384.0 KiB [          ]  2016-10-30.nmea
  344.0 KiB [          ]  2017-09-06.nmea
  284.0 KiB [          ]  2017-02-14.nmea
  220.0 KiB [          ]  2017-02-26.nmea
  192.0 KiB [          ]  Zeichenfläche 2@600x.png
  108.0 KiB [          ]  Zeichenfläche 2@400x.png
   88.0 KiB [          ]  Zeichenfläche 2@800x-8.png
   88.0 KiB [          ]  Fd5yojoWAAUpo9e.jpg
   60.0 KiB [          ]  Zeichenfläche 2@600x-8.png
   40.0 KiB [          ]  rgm.py
   40.0 KiB [          ]  Zeichenfläche 2@200x.png
   36.0 KiB [          ]  Zeichenfläche 2@400x-8.png
 Total disk usage:  11.1 GiB  Apparent size:  11.1 GiB  Items: 660

seth · 2022-10-21 19:37:07

Try to run ncdu as root and otherwise post the outputs of

df -hi
mount

paulbrause · 2022-10-21 19:43:59

ncdu as root shows exactly the same as non-root.

df -hi

/dev/sdc4         66M     2,2M   64M    4% /mnt/downloads

mount

/dev/sdc4 on /home/paulbrause/Downloads type ext4 (rw,noatime)

seth · 2022-10-21 19:59:16

Not excerpts of the output - esp. not the "mount" one.
You're not running out of inodes, but 2.2M seems a lot for 11GB of data
"df -h" is still at 100% usage?

paulbrause · 2022-10-21 20:29:01

Yes, df -h is still at 100%.

/dev/sdc4       1,1T    988G     0  100% /mnt/downloads

but 2.2M seems a lot for 11GB of data

Is it possible, that this is because these are still the inodes of the "disappeared" data?

seth · 2022-10-21 20:36:53

Is it possible, that this is because these are still the inodes of the "disappeared" data?

Well see.
I want to see the entire output of "mount", not only the line for sdc4

paulbrause · 2022-10-21 21:28:13

Oh, my bad. Sorry.

~ $ mount
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
sys on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
dev on /dev type devtmpfs (rw,nosuid,relatime,size=8145232k,nr_inodes=2036308,mode=755,inode64)
run on /run type tmpfs (rw,nosuid,nodev,relatime,mode=755,inode64)
efivarfs on /sys/firmware/efi/efivars type efivarfs (rw,nosuid,nodev,noexec,relatime)
/dev/sdf1 on / type ext4 (rw,relatime)
securityfs on /sys/kernel/security type securityfs (rw,nosuid,nodev,noexec,relatime)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev,inode64)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
cgroup2 on /sys/fs/cgroup type cgroup2 (rw,nosuid,nodev,noexec,relatime,nsdelegate,memory_recursiveprot)
pstore on /sys/fs/pstore type pstore (rw,nosuid,nodev,noexec,relatime)
bpf on /sys/fs/bpf type bpf (rw,nosuid,nodev,noexec,relatime,mode=700)
systemd-1 on /proc/sys/fs/binfmt_misc type autofs (rw,relatime,fd=30,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=15633)
hugetlbfs on /dev/hugepages type hugetlbfs (rw,relatime,pagesize=2M)
mqueue on /dev/mqueue type mqueue (rw,nosuid,nodev,noexec,relatime)
debugfs on /sys/kernel/debug type debugfs (rw,nosuid,nodev,noexec,relatime)
tracefs on /sys/kernel/tracing type tracefs (rw,nosuid,nodev,noexec,relatime)
configfs on /sys/kernel/config type configfs (rw,nosuid,nodev,noexec,relatime)
fusectl on /sys/fs/fuse/connections type fusectl (rw,nosuid,nodev,noexec,relatime)
tmpfs on /tmp type tmpfs (rw,nosuid,nodev,nr_inodes=1048576,inode64)
/dev/sdb2 on /boot/efi type vfat (rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=ascii,shortname=mixed,utf8,errors=remount-ro)
/dev/sda1 on /mnt/workspace type ext4 (rw,noatime)
/dev/sde2 on /mnt/syncthing type ext4 (rw,noatime)
/dev/sde2 on /home/paulbrause/Syncthing type ext4 (rw,noatime)
/dev/sde1 on /mnt/dropbox type ext4 (rw,noatime)
/dev/sde1 on /home/paulbrause/Dropbox type ext4 (rw,noatime)
/dev/sdc2 on /mnt/musik type ext4 (rw,noatime)
/dev/sdd1 on /mnt/arbeit type ext4 (rw,noatime)
/dev/sdc2 on /home/paulbrause/Musik type ext4 (rw,noatime)
/dev/sdc1 on /mnt/timeshift type ext4 (rw,noatime)
/dev/sdd2 on /mnt/daten type ext4 (rw,noatime)
/dev/sdd3 on /mnt/fotos type ext4 (rw,noatime)
/dev/sdd1 on /home/paulbrause/Arbeit type ext4 (rw,noatime)
/dev/sdd2 on /home/paulbrause/Daten type ext4 (rw,noatime)
/dev/sdd3 on /home/paulbrause/Fotos type ext4 (rw,noatime)
/dev/sdc1 on /home/paulbrause/Timeshift type ext4 (rw,noatime)
/dev/sda1 on /home/paulbrause/Arbeit/Workspace type ext4 (rw,noatime)
/dev/sda1 on /mnt/arbeit/Workspace type ext4 (rw,noatime)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,nosuid,nodev,noexec,relatime)
tmpfs on /run/user/1000 type tmpfs (rw,nosuid,nodev,relatime,size=1632584k,nr_inodes=408146,mode=700,uid=1000,gid=1000,inode64)
portal on /run/user/1000/doc type fuse.portal (rw,nosuid,nodev,relatime,user_id=1000,group_id=1000)
/etc/autofs/auto.nas on /home/paulbrause/NAS type autofs (rw,relatime,fd=6,pgrp=1139,timeout=60,minproto=5,maxproto=5,indirect,pipe_ino=20153)
/etc/autofs/auto.cifs on /home/paulbrause/StorageBox type autofs (rw,relatime,fd=12,pgrp=1139,timeout=60,minproto=5,maxproto=5,indirect,pipe_ino=21752)
/etc/autofs/auto.misc on /misc type autofs (rw,relatime,fd=18,pgrp=1139,timeout=300,minproto=5,maxproto=5,indirect,pipe_ino=21219)
gvfsd-fuse on /run/user/1000/gvfs type fuse.gvfsd-fuse (rw,nosuid,nodev,relatime,user_id=1000,group_id=1000)
/dev/sdc4 on /mnt/downloads type ext4 (rw,noatime)
/dev/sdc4 on /home/paulbrause/Downloads type ext4 (rw,noatime)

~ $ df -hi
Dateisystem    Inodes IBenutzt IFrei IUse% Eingehängt auf
dev              2,0M      756  2,0M    1% /dev
run              2,0M     1,3K  2,0M    1% /run
/dev/sdf1         57M     2,8M   54M    5% /
tmpfs            2,0M      118  2,0M    1% /dev/shm
tmpfs            1,0M       88  1,0M    1% /tmp
/dev/sdb2           0        0     0     - /boot/efi
/dev/sda1         15M     938K   14M    7% /mnt/workspace
/dev/sde2        3,5M       11  3,5M    1% /mnt/syncthing
/dev/sde1        3,5M     1,1K  3,5M    1% /mnt/dropbox
/dev/sdc2         62M      68K   61M    1% /mnt/musik
/dev/sdd1         31M       12   31M    1% /mnt/arbeit
/dev/sdc1         49M     1,1M   48M    3% /mnt/timeshift
/dev/sdd2         31M      340   31M    1% /mnt/daten
/dev/sdd3        114M      69K  114M    1% /mnt/fotos
tmpfs            399K      135  399K    1% /run/user/1000
/dev/sdc4         66M     2,2M   64M    4% /mnt/downloads

But now i realized something curious...

When i try to boot my Arch, i stops booting and i get into emergency mode.
So i had to comment the partition out of /etc/fstab and Arch booted again.

# /mnt/downloads
UUID=c950dc48-a278-40df-b5c3-5584b978ad34 /mnt/downloads        ext4    rw,noatime,defaults        0       2
/mnt/downloads/ /home/paulbrause/Downloads              none    bind    0       0

(the original fstab-entry)

When i now manually mount the partition, i see, that there is about ~60GB free. But when i refresh the filemanager (i use dolphin) the free space decreases until it is at 0.

seth · 2022-10-21 21:38:52

How does it behave w/o the bind mount?

paulbrause · 2022-10-22 10:13:49

Without the bind mount it's exactly the same...

Booting not possible with fstab, and when i manually mount, the partition shows a little free space which decreases in a few seconds to zero.

seth · 2022-10-22 12:50:27

Did you check whether anything is using the partition?

sudo lsof | grep -i downloads

Are there files inside the mountpoints before you mount the partition?
Are there any symlinks involved?

paulbrause · 2022-10-23 14:38:37

I did check, but nothing is using the partition.

~ $ sudo lsof | grep -i downloads
lsof: WARNING: can't stat() fuse.portal file system /run/user/1000/doc
      Output information may be incomplete.
lsof: WARNING: can't stat() fuse.gvfsd-fuse file system /run/user/1000/gvfs
      Output information may be incomplete.

Before i mount the partition there are no files inside the mountpoints.
And no, i have no symlinks to or from this partition.

Arch Linux

#1 2022-10-19 21:24:35

After resizing ext4-Partition many files disappeared

#2 2022-10-19 21:38:15

Re: After resizing ext4-Partition many files disappeared

#3 2022-10-19 21:46:21

Re: After resizing ext4-Partition many files disappeared

#4 2022-10-19 22:36:33

Re: After resizing ext4-Partition many files disappeared

#5 2022-10-20 11:32:16

Re: After resizing ext4-Partition many files disappeared

#6 2022-10-20 12:57:19

Re: After resizing ext4-Partition many files disappeared

#7 2022-10-21 16:39:51

Re: After resizing ext4-Partition many files disappeared

#8 2022-10-21 16:47:12

Re: After resizing ext4-Partition many files disappeared

#9 2022-10-21 16:52:26

Re: After resizing ext4-Partition many files disappeared

#10 2022-10-21 16:59:38

Re: After resizing ext4-Partition many files disappeared

#11 2022-10-21 17:05:12

Re: After resizing ext4-Partition many files disappeared

#12 2022-10-21 19:03:26

Re: After resizing ext4-Partition many files disappeared

#13 2022-10-21 19:06:37

Re: After resizing ext4-Partition many files disappeared

#14 2022-10-21 19:21:54

Re: After resizing ext4-Partition many files disappeared

#15 2022-10-21 19:26:04

Re: After resizing ext4-Partition many files disappeared

#16 2022-10-21 19:37:07

Re: After resizing ext4-Partition many files disappeared

#17 2022-10-21 19:43:59

Re: After resizing ext4-Partition many files disappeared

#18 2022-10-21 19:59:16

Re: After resizing ext4-Partition many files disappeared

#19 2022-10-21 20:29:01

Re: After resizing ext4-Partition many files disappeared

#20 2022-10-21 20:36:53

Re: After resizing ext4-Partition many files disappeared

#21 2022-10-21 21:28:13

Re: After resizing ext4-Partition many files disappeared

#22 2022-10-21 21:38:52

Re: After resizing ext4-Partition many files disappeared

#23 2022-10-22 10:13:49

Re: After resizing ext4-Partition many files disappeared

#24 2022-10-22 12:50:27

Re: After resizing ext4-Partition many files disappeared

#25 2022-10-23 14:38:37

Re: After resizing ext4-Partition many files disappeared

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