Questions tagged [btrfs]
B-tree file system, next-generation Linux file system
266
questions
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1answer
21 views
How to delete all duplicates of a file linked by CoW on BTRFS
The glory of Copy-on-Write (CoW) allows us to copy a file as many times as we like, without duplicating the used space.
I have used this functionality extensively (as well as manual deduplication of ...
0
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0answers
31 views
btrfs volume in fstab fails to boot with compress-force
in my fstab, the btrfs volume boots with no problem when the option set is compress=zstd:15, however, as soon as i set it to compress-force=zstd:15, it fails to boot because of a failed dependency
...
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0answers
28 views
How exactly do btrfs/ZFS (and related filesystems) prevent bit rot?
It seems that, since btrfs development began, various communities have touted both it and ZFS as inherently more advanced filesystems for preventing corruption, bit rot, etc.
What features of btrfs or ...
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0answers
117 views
Btrfs write speed very slow. In Linux how do I copy files using page cache?
I have 2 filesystems consisting of the same 15Tib size with both of them using 4 nvme ssd of the same model using btrfs based raid0 with all of the them plugged to a pci port.
Both filesystem are ...
0
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0answers
15 views
How to specify logical size when mkfs.btrfs
I'm setting up a btrfs filesystem where there are 10TB files with an average file size of 1GB - all videos.
Normally I'd go for the maximum allowed logical size but I couldn't find out how to specify ...
0
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0answers
33 views
Filesystem/LVM config that will prioritize “wearing out” smaller drives first
I've built a janky NAS box for myself that has a wide range of storage device sizes (20GB to 4TB) and all mashed together with BTRFS on Debian Linux. I've noticed that BTRFS will prioritize writing to ...
0
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0answers
35 views
BTRFS partition vs subvolume metadata size
Currently, I have two separate BTRFS partitions on my system - A 20gb root partition and a dramatically larger home partition. I am wondering if I want to change the home partition to a subvolume of ...
1
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0answers
28 views
btrfs quotas: Can't delete files when quota is exceeded
I set quotas on our smb server's /home/<name> subvolumes.
These subvolumes are exposed over smb as \\server\<name>
Now whenever someone tries to delete files in his/her /home folder and is ...
0
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2answers
52 views
Convert hardlinks to reflinks
I have nested folders with a bunch of files inside that are hardlinked to each other. I would like to break the hardlinks (convert them into separate files), but then immediately convert each pair ...
1
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0answers
31 views
linux system IO hangs/freezes randomly for ~30 sec
while working on my ubuntu 20.04 desktop, I'll notice a occasional freezes where it "mostly" goes out to lunch for 10's of seconds to ~1 minute. Happens perhaps ~~once an hour. I can still ...
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0answers
64 views
Dual Boot Debian with BTRFS & LUKS
I have Windows 10, existing Debian installation (which is dead).
I want to install Debian 10 with LUKS on BTRFS keeping my Windows 10 intact. There are a few good writeups about it which i've followed ...
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0answers
22 views
btrfs restore not-yet-cleaned subvolume
I have incidentially removed a subvolume with btrfs subvolume delete.
Now btrfs subvolume list -d shows the subvolume is in DELETED state:
ID 257 gen 205948 top level 0 path DELETED
How can I restore/...
1
vote
2answers
300 views
Should I format my external hard disks in EXT4 or NTFS or BTRFS? [closed]
I have four hard disks:
240GB SSD formatted as EXT4 for main OS.
3TB HDD formatted as NTFS for main files.
500GB HDD formatted as NTFS for luks containers.
4TB HDD formatted as NTFS for backuping all ...
0
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0answers
18 views
Monitor filesystem regularly
I have a btrfs filesystem and I had some kind of accident which deleted the content of some directories, but only those in a specific subdirectory and even in this subdirectory there were some ...
0
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1answer
51 views
btrfs and fstab with failed device
A lot of guides on how to mount a btrfs filesystem say you can use any device in the filesystem to mount.
Ex: if a filesystem has sda1, sdb1, and sdc1 in it, you can mount using any of those devices.
...
3
votes
0answers
109 views
Why is converting from RAID1 to single in Btrfs an I/O-intensive operation?
I want to replace a device in a RAID1 and converted it temporarily to “single”:
btrfs balance start -f -mconvert=single,soft -dconvert=single,soft /
This takes very long. I don’t see why, and wonder ...
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0answers
276 views
How to properly compress BTRFS subvolumes NOT compressed before?
Background
I maintain multiple Synology NAS of different models and those support so called shared folders. If the volume containing those folders is formatted using BTRFS, which is the case for me, ...
1
vote
1answer
229 views
btrfs damaged filesystem - how to continue
My btrfs filesystem is somehow damaged (parent transid, internal errors, ...). I tried with repair options, but I think some of the filesystem is just messed up now. The btrfs volume is used for ...
-1
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1answer
35 views
btrfs error checking when copying files between btrfs HDDs?
If I have two separate USB HDDs with btrfs (both single-mode, no DUP nor RAID) and copy a file from one HDD to another, does btrfs ensure that the copied file is still identical to the original file, ...
0
votes
1answer
211 views
btrfs check / scrub: what is the difference?
I am going to use (for now) btrfs on a couple of external USB HDD archives, in single-mode (no DUP, no RAID, no nothing; I will just keep it simple for now). So my idea is that I have two (manually ...
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0answers
30 views
Can't successfully delete file on btrfs filesystem
I've got a 4 GB file in a BTRFS file system that just won't go away. I have deleted it multiple times, I've even echo'd to it, and it keeps coming back. The ls -l is:
-rw-rw-r-- 1 mark mark 4072587264 ...
1
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0answers
58 views
What does “Counts for qgroup … are different” mean and how to fix it?
I've been using btrfs for my primary file system for a Linux Mint 20 install I did a couple of months ago. Today I had reason to want to extend the partition the btrfs filesystem is on, and gparted ...
0
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2answers
740 views
Debian BTRFS install
Partition disks:
Shell:
https://www.reddit.com/r/debian/comments/aa3zta/install_debian_to_a_btrfs_subvolume_and_not_the/eczobqb/
Once the partitioning step is complete, select "Back" in ...
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0answers
21 views
How to add BTRFS partition to degraded Raid 1 Array
How do I add a BTRFS partition, smaller than the entire disk, to a degraded Raid 1 Array? Recently, I lost 1 drive in a 2 drive btrfs raid 1 array. However, my new drive is larger than the original ...
1
vote
1answer
151 views
Is this a correct BTRFS incremental backup strategy?
Assuming /home is my BTRFS partition (to keep backups of) & /storage as my secondary disk (to store backups on), will this work?
Initial Backup (8th Sept 2020):
btrfs subvolume snapshot -r /home /...
0
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0answers
62 views
how to correct csum errors in BTRFS RAID
I'm running a BTRFS RAID on 4 disks, using RAID5 for data and RAID1 for metadata:
> btrfs filesystem show /mnt/storage/
Label: 'Storage' uuid: [...]
Total devices 4 FS bytes used 1.61TiB
...
0
votes
1answer
433 views
Difference between filesystem BTRFS size with df, btrfs and baobab
Today my desktop gave me a notification that my /-filesystem was 'full'. So at first i did some cleanup of files, packages and old snapshots.
However, when i removed the previous i noticed with the ...
4
votes
2answers
1k views
btrfs, LUKS, swapfile: How to hibernate on swapfile?
I'm using btrfs encrypted by LUKS on fedora 32 silverblue, kernel version 5.7.7 with anaconda installer default setting.
Because fedora installer automatic partition does not add swap partition or ...
0
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0answers
29 views
My root partition disappeared when using testdisk
This morning I was planning on deleting Windows 10 completely for good so I opened up Gparted, deleted the partition, and called it a day. No, there was something wrong.
I forgot to check if there was ...
0
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0answers
175 views
Synology RAID 1 Recovery - Accidentally formatted a BTRFS as ZFS - next steps?
Would really appreciate someone pointing me in the right direction.
Today at work we found out our Synology box had its motherboard go. From what I can tell, it was set up with two 8TB drives in RAID ...
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0answers
42 views
BTRFS zero log, now can't find any recent files
I recently physically relocated my Pi + BTRFS array (let's say /dev/sda and /dev/sdb, set up as a mirror) and was struggling to get the subvolume to mount properly again. Amongst the many things I ...
0
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0answers
34 views
File manager stopped working on Linux system
Somehow Nautilus stopped working on Linux fedora and now I am unable to use any file manager.
I tried to uninstall and reinstall Nautilus and even installed other file manager but nothing works.
...
1
vote
1answer
373 views
Is it safe to convert EXT4 to BTRFS inplace?
Ubuntu 20.04 makes it very hard to create an encrypted installation with BTRFS file system. Thus, I have an encrypted installation running on ext4. For a number of reasons I would like to use BTRFS ...
1
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0answers
237 views
btrfs ls gets invalid root flags
3 months ago, after a powercut, our Synology NAS DS415+ started to reboot to hell, staying 5 minutes up and then rebooting.
We recently tried to recover the data from it,2*3TB SHR-RAID 1.
After a long ...
0
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0answers
47 views
Cannot repair BTRFS partition because there is too little space left
I cannot mount a BTRFS partition because its metadata store is too full.
The machine started complaining that the disk is full (it was the metadata) and while trying to fix the situation by running ...
0
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0answers
29 views
Mysterious High Command-Timout on SMART data for HDD
I recently was checking a drive I bought and owned for around 10 days (250 power on hours). The drive is a Seagate ironwolf 4tb in RAID 1 using BTRFS. I noticed that this was the result of the SMART ...
2
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0answers
54 views
Does the queued TRIM support in SATA 3.1 require support from the SATA controller, or just from the OS and the SSD?
I am contemplating expanding the storage on my home server with a SATA expansion card and wonder if the card has to support queued TRIM to use it or if it is just an OS+SSD thing.
Hardware example
My ...
1
vote
1answer
33 views
Does using different kernel versions (dual boot) containing different versions of btrfs with the same btrfs filesystem cause problems?
Didn't find any answer in the official wiki: https://btrfs.wiki.kernel.org/index.php/FAQ
Why would I want to do that?
I want to try another distro along side my currently installed distro.
Where's the ...
0
votes
1answer
204 views
Is it possible to change the ID of a BTRFS subvolume?
I want to make the IDs of my subvolumes consecutive so I can access them easier. Is there any way to change the ID of a BTRFS subvolume without nuking the data it contains? If so, how would you do ...
0
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0answers
21 views
automounted btrfs disk array is mounted twice, in both /mnt and /media
I'm configuring a new ubuntu20.04 machine, otherwise vanilla, with an existing disk array: 3 disks, btrfs-in-luks (no LVM), raid 1.
via crypttab/cryptsetup and fstab I have it set up to mount in /mnt/...
3
votes
0answers
274 views
Recovering BTRFS, btrfsck fails; what next?
Server setup
Rockstor, latest stable (can't check exact version right now)
3 hard drives: OS drive + 2 "Storage" drives
Storage drives are BTRFS RAID 1, /dev/sdb and /dev/sdc
btrfs-progs v4.12
...
0
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0answers
18 views
When scrubbing a BTRFS RAID1, is scrubbing one device enough?
Assuming I have a BTRFS-based RAID1 which consists of
Label: none uuid: 02bfb534-bc70-4f2d-980d-62004b8993dc
Total devices 2 FS bytes used 1.44TiB
devid 1 size 1.82TiB used 1....
0
votes
1answer
730 views
How to remove a snapper config when getting error “deleting snapshot failed”?
I am using snapper to take snapshots of btrfs volumes. I have one for /var as well, but decided that I want to get rid of it. It corresponds to the _var snapper config. I can't manage to do this, ...
1
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0answers
123 views
docker using btrfs on lvm2 mount
I've modified my synology DS918 (DSM 6.2.2-24922 Update 4) to run docker-19.03.8. Unfortunately, while the main mount /volume1 is btrfs, and docker supports btrfs as a storage driver, it
requires a ...
2
votes
0answers
730 views
Force btrfs to allocate unallocated space
My programs are complaining there is not enough space left on my btrfs RAID1. However, I seem to be unable to allocate more space.
sudo btrfs filesystem resize 1:max /mnt
sudo btrfs filesystem ...
1
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0answers
70 views
SSD, HDD, lvm on luks, btrfs, efi
I want to install Ubuntu desktop 20.04 on my laptop (which has an SSD and an HDD) using this scheme:
Create luks2 container on each drive and lvms inside them.
Format ssd's lvm as btrfs for using ...
0
votes
1answer
338 views
smartctl looks like it's giving incorrect results, is my SSD dying?
While backing up some files today, I noticed that btrfs complained that some blocks on my Crucial MX500 1TB SSD didn't have the correct checksum. I ran a btrfs scrub which reported this:
● btrfs-...
0
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0answers
199 views
ReFS/BtrFS on hardware raid vs storage spaces/LVM?
I have a Dell Poweredge R230 with 4x 8TB Caviar Red which I‘d like to setup as company file server, likely running windows server (unless i go with btrfs and the windows driver is no good in which ...
0
votes
1answer
587 views
BTRFS Balance taking 100% cpu and 100% I/O
We have a SuSE 12, sp3 server (SLES, not openSuSE). There is only one disk in use on the system, the root disk with several file systems under mounted with BTRFS.
We are seeing issues where a "btrfs ...
0
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0answers
116 views
Urbackup unable to use btrfs partition
I'm trying to get urbackup 2.4.9.0 to work on Ubuntu 19.10 x86.
I have a 2T usb drive partitioned as btrfs, but it's not recognized as btrfs by urbackup_snapshot_helper.
/etc/urbackup/backupfolder ...
