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Btrfs recompress full#
Btrfs recompress free#

Read "Why is there so many ways to check the amount of free space" below for the blow-by-blow. This is especially apparent when running low on it. Help! I ran out of disk space! Help! Btrfs claims I'm out of space, but it looks like I should have lots left!įree space is a tricky concept in Btrfs. Note: Disable the write cache on each drive by running hdparm -W0 /dev/sda against each drive on every boot.įailure to perform this can result in massive and possibly irrecoverable corruption (especially in the case of encrypted filesystems). There is only one certain way to work around this:

Btrfs recompress full#

This is a severe condition, which can result in full file-system corruption, not just losing or corrupting data that was being written at the time of the power cut or crash. Your hard drive has been detected as not supporting barriers. I see a warning in dmesg about barriers being disabled when mounting my filesystem. Then use Bugzilla which will ensure traceability. If that page doesn't help you, try asking on IRC or the Btrfs mailing list.Įxplicitly said: please report bugs and issues to the mailing list (you are not required to subscribe). See the Problem FAQ for commonly-encountered problems and solutions. Important Questions I have a problem with my Btrfs filesystem! Edward Shishkin's "Unbound(?) internal fragmentation in Btrfs") files cannot be deleted once the filesystem is full

7.2 Will Btrfs become a clustered file system.

7.1 What is your affiliation with WinBtrfs.

6.4 Case study: btrfs-raid 5/6 versus MD-RAID 5/6.

6.3 What are the differences among MD-RAID / device mapper / Btrfs raid?.

6.2 Does the Btrfs multi-device support make it a "rampant layering violation"?.

6.1 Btrfs has subvolumes, does this mean I don't need a logical volume manager and I can create a big Btrfs filesystem on a raw partition?.

6 Interaction with partitions, device managers and logical volumes.

5.4 Can I mount subvolumes with different mount options?.

5.2 How do I find out which subvolume is mounted?.

4.25 What does "parent transid verify failed" mean?.

4.24 How do I recover from a "parent transid verify failed" error?.

4.23 What is the difference between -c and -p in send?.

4.22 What is the GlobalReserve and why does 'btrfs fi df' show it as single even on RAID filesystems?.

4.21 Why do I have "single" chunks in my RAID filesystem?.

4.20 Can I change metadata block size without recreating the filesytem?.

4.19 Can I find out compression ratio of a file?.

4.18 How long will the Btrfs disk format keep changing?.

4.17 What is the difference between mount -o ssd and mount -o ssd_spread?.

4.15 Do I need to run a balance regularly?.

4.14 Does a balance operation recompress files?.

4.13 Does a balance operation make the internal B-trees better/faster?.

4.11 How much space do I get with unequal devices in RAID-1 mode?.

4.10 How much space will I get with my multi-device configuration?.

4.9 Why is there so much space overhead?.

4.7.3 Understanding free space, using third-party tools.

4.7.2 Understanding free space, using the new tools.

4.7.1 Understanding free space, using the original tools.

4.7 or My filesystem is full, and I've put almost nothing into it!.

4.5 I have converted my ext4 partition into Btrfs, how do I delete the ext2_saved folder?.4.4 Do I have to keep my btrfs-progs at the same version as my kernel?.4.3 What version of btrfs-progs should I use for my kernel?.3.10 Is it possible to boot to Btrfs without an initramfs?.3.6 Does Btrfs work on top of dm-crypt?.3.2 Can I use RAID on my Btrfs filesystem?.3.1.1 What's the difference between btrfsck and fsck.btrfs.3.1 When will Btrfs have a fsck like tool?.2.9 Can I have nodatacow (or chattr +C) but still have checksumming?.2.8 Can copy-on-write be turned off for data blocks?.2.7 Can data checksumming be turned off?.2.6 What checksum function does Btrfs use?.2.5 Can the data=ordered mode be turned off in Btrfs?.2.4 What are the crash guarantees of rename?.2.3 Why I experience poor performance during file access on filesystem?.2.2 What are the crash guarantees of overwrite-by-rename?.2.1 Does Btrfs have data=ordered mode like Ext3?.1.5 Are Btrfs changes backported to stable kernel releases?.1.4 Help! Btrfs claims I'm out of space, but it looks like I should have lots left!.1.2 I see a warning in dmesg about barriers being disabled when mounting my filesystem.1.1 I have a problem with my Btrfs filesystem!.