Re: Convert from RAID 5 to 10

with some raid 10 or 5 equivalent. zfs seems to be nice, mature solution, but I also prefer to use something native to Linux. Best Regards, Florian Am 29.11.2016 um 18:20 schrieb Florian Lindner: > Hello, > > I have 4 harddisks with 3TB capacity each. They are all used in a btrfs RAID &g

Convert from RAID 5 to 10

Hello, I have 4 harddisks with 3TB capacity each. They are all used in a btrfs RAID 5. It has come to my attention, that there seem to be major flaws in btrfs' raid 5 implementation. Because of that, I want to convert the the raid 5 to a raid 10 and I have several questions. * Is that possible

Re: Can't mount: open_ctree failed!

Robert White wrote: On 11/02/2014 07:18 AM, Florian Lindner wrote: # btrfsck /dev/sdb1 # btrfsck --init-extent-tree /dev/sdb1 # btrfsck --init-csum-tree /dev/sdb1 Notably missing from all these commands is --repair... I don't know that's your problem for sure, but it's where I would

Re: Can't mount: open_ctree failed!

Chris Murphy wrote: On Nov 2, 2014, at 8:18 AM, Florian Lindner mailingli...@xgm.de wrote: Hello, all after sudden I can't mount my btrfs home partition anymore. System is Arch with kernel 3.17.2, but I use snapper which does snapshopts regularly and I had 3.17.1 before, which afaik

Can't mount: open_ctree failed!

Hello, all after sudden I can't mount my btrfs home partition anymore. System is Arch with kernel 3.17.2, but I use snapper which does snapshopts regularly and I had 3.17.1 before, which afaik had some problems with snapshops. Trying to mount without any options gives to the syslog: Nov 02

Re: Scrub being stuck

Florian Lindner wrote: Hello, I've just completed a scrub on my home filesystem and now I wanted to start on my Archiv btrfs RAID 0. A scrub I started at Jan 02 seems to be stuck somehow. The command outputs above were generated right now. Thanks! Changing to canceled:1 in /var/lib/btrfs

Scrub being stuck

Hello, I've just completed a scrub on my home filesystem and now I wanted to start on my Archiv btrfs RAID 0. root@horus ~ # uname - a

Re: Scrub being stuck

Florian Lindner wrote: Hello, I've just completed a scrub on my home filesystem and now I wanted to start on my Archiv btrfs RAID 0. Amendment: anything btrfs related dmesg shows is [ 38.240950] BTRFS info (device sdd1): csum failed ino 314 off 4129595392 csum 1774389615 expected csum

Deduplication

Hello, some questions regarding btrfs deduplication. - What is the state of it? Is it safe to use? https://btrfs.wiki.kernel.org/index.php/Deduplication does not yield much information. - https://pypi.python.org/pypi/bedup says: bedup looks for new and changed files, making sure that multiple

(un)mounting takes a long time

Hello! I'm using ArchLinux with kernel Linux horus 3.10.5-1-ARCH #1 SMP PREEMPT. Mounting and unmounting takes a long time: # time mount -v /mnt/Archiv mount: /dev/sde1 mounted on /mnt/Archiv. mount -v /mnt/Archiv 0,00s user 0,16s system 1% cpu 9,493 total # sync time umount -v

Questions about multi-device behavior

Hello! I create a btrfs volume comprised of two partitions: # mkfs.btrfs -m dup -d single /dev/sdd1 /dev/sde1 metadata ist mirrored on each device, data chunks are scattered more or less randomly on one disk. a) If one disk fails, is there any chance of data recovery? b) If not, is there

btrfs kernel threads producing high load and slow system down

Hello, I habe the problems described in here https://btrfs.wiki.kernel.org/index.php/Gotchas: Files with a lot of random writes can become heavily fragmented (1+ extents) causing trashing on HDDs and excessive multi-second spikes of CPU load on systems with an SSD or large amount a RAM. On

subvolumes: default and IDs

Hey! I recently starting playing with btrfs and subvolume, but it has left me puzzled: Distribution is Archlinux, Kernel is 3.4.6. root@horus /mnt # mkfs.btrfs -L test /dev/sdb1 WARNING! - Btrfs Btrfs v0.19 IS EXPERIMENTAL WARNING! - see http://btrfs.wiki.kernel.org before using fs created