On 2018/11/28 上午5:16, Mikko Merikivi wrote: > I seem unable to convert an existing btrfs device array to RAID 10. > Since it's pretty much RAID 0 and 1 combined, and 5 and 6 are > unstable, it's what I would like to use. > > After I did tried this with 4.19.2-arch1-1-ARCH and btrfs-progs v4.19, > I updated my system and tried btrfs balance again with this system > information: > [mikko@localhost lvdata]$ uname -a > Linux localhost 4.19.4-arch1-1-ARCH #1 SMP PREEMPT Fri Nov 23 09:06:58 > UTC 2018 x86_64 GNU/Linux > [mikko@localhost lvdata]$ btrfs --version > btrfs-progs v4.19 > [mikko@localhost lvdata]$ sudo btrfs fi show > Label: 'main1' uuid: c7cbb9c3-8c55-45f1-b03c-48992efe2f11 > Total devices 1 FS bytes used 2.90TiB > devid 1 size 3.64TiB used 2.91TiB path /dev/mapper/main > > Label: 'red' uuid: f3c781a8-0f3e-4019-acbf-0b783cf566d0 > Total devices 2 FS bytes used 640.00KiB > devid 1 size 931.51GiB used 2.03GiB path /dev/mapper/red1 > devid 2 size 931.51GiB used 2.03GiB path /dev/mapper/red2
RAID10 needs at least 4 devices. Thanks, Qu > [mikko@localhost lvdata]$ btrfs fi df /mnt/red/ > Data, RAID1: total=1.00GiB, used=512.00KiB > System, RAID1: total=32.00MiB, used=16.00KiB > Metadata, RAID1: total=1.00GiB, used=112.00KiB > GlobalReserve, single: total=16.00MiB, used=0.00B > > --- > > Here are the steps I originally used: > > [mikko@localhost lvdata]$ sudo cryptsetup luksFormat -s 512 > --use-random /dev/sdc > [mikko@localhost lvdata]$ sudo cryptsetup luksFormat -s 512 > --use-random /dev/sdd > [mikko@localhost lvdata]$ sudo cryptsetup luksOpen /dev/sdc red1 > [mikko@localhost lvdata]$ sudo cryptsetup luksOpen /dev/sdd red2 > [mikko@localhost lvdata]$ sudo mkfs.btrfs -L red /dev/mapper/red1 > btrfs-progs v4.19 > See http://btrfs.wiki.kernel.org for more information. > > Label: red > UUID: f3c781a8-0f3e-4019-acbf-0b783cf566d0 > Node size: 16384 > Sector size: 4096 > Filesystem size: 931.51GiB > Block group profiles: > Data: single 8.00MiB > Metadata: DUP 1.00GiB > System: DUP 8.00MiB > SSD detected: no > Incompat features: extref, skinny-metadata > Number of devices: 1 > Devices: > ID SIZE PATH > 1 931.51GiB /dev/mapper/red1 > > [mikko@localhost lvdata]$ sudo mount -t btrfs -o > defaults,noatime,nodiratime,autodefrag,compress=lzo /dev/mapper/red1 > /mnt/red > [mikko@localhost lvdata]$ sudo btrfs device add /dev/mapper/red2 /mnt/red > [mikko@localhost lvdata]$ sudo btrfs balance start -dconvert=raid10 > -mconvert=raid10 /mnt/red > ERROR: error during balancing '/mnt/red': Invalid argument > There may be more info in syslog - try dmesg | tail > code 1 > > [mikko@localhost lvdata]$ dmesg | tail > [12026.263243] BTRFS info (device dm-1): disk space caching is enabled > [12026.263244] BTRFS info (device dm-1): has skinny extents > [12026.263245] BTRFS info (device dm-1): flagging fs with big metadata feature > [12026.275153] BTRFS info (device dm-1): checking UUID tree > [12195.431766] BTRFS info (device dm-1): enabling auto defrag > [12195.431769] BTRFS info (device dm-1): use lzo compression, level 0 > [12195.431770] BTRFS info (device dm-1): disk space caching is enabled > [12195.431771] BTRFS info (device dm-1): has skinny extents > [12205.815941] BTRFS info (device dm-1): disk added /dev/mapper/red2 > [12744.788747] BTRFS error (device dm-1): balance: invalid convert > data profile raid10 > > Converting to RAID 1 did work but what can I do to make it RAID 10? > With the up-to-date system it still says "invalid convert data profile > raid10". >
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