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Am Mon, 19 Jan 2015 16:32:53 +0800 |
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schrieb Bill Kenworthy <billk@×××××××××.au>: |
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> Can someone suggest what is causing a balance on this raid 1, 3 disk |
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> volume to successfully complete but leave the data unevenly distributed? |
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> Content is mostly VM images. |
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> |
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> sdc and sdd are 2TB WD greens, and sda is a 2TB WD red. |
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> |
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> |
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> rattus backups # btrfs fi sh |
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> Label: none uuid: 04d8ff4f-fe19-4530-ab45-d82fcd647515 |
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> Total devices 1 FS bytes used 8.25GiB |
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> devid 1 size 271.36GiB used 23.04GiB path /dev/sdb3 |
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> |
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> Label: none uuid: f5a284b6-442f-4b3d-aa1a-8d6296f517b1 |
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> Total devices 3 FS bytes used 1.90TiB |
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> devid 1 size 1.82TiB used 1.77TiB path /dev/sdc |
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> devid 2 size 1.82TiB used 1.77TiB path /dev/sdd |
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> devid 4 size 1.82TiB used 270.03GiB path /dev/sda |
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> |
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> Btrfs v3.18 |
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> rattus backups # btrfs fi df /mnt/btrfs-root/ |
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> Data, RAID1: total=1.90TiB, used=1.89TiB |
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> System, RAID1: total=32.00MiB, used=464.00KiB |
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> Metadata, RAID1: total=8.00GiB, used=6.53GiB |
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> GlobalReserve, single: total=512.00MiB, used=0.00B |
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> rattus backups # btrfs fi usage /mnt/btrfs-root/ |
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> Overall: |
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> Device size: 5.46TiB |
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> Device allocated: 3.81TiB |
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> Device unallocated: 1.65TiB |
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> Used: 3.80TiB |
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> Free (estimated): 845.00GiB (min: 845.00GiB) |
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> Data ratio: 2.00 |
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> Metadata ratio: 2.00 |
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> Global reserve: 512.00MiB (used: 154.42MiB) |
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> |
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> Data,RAID1: Size:1.90TiB, Used:1.89TiB |
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> /dev/sda 265.00GiB |
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> /dev/sdc 1.77TiB |
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> /dev/sdd 1.77TiB |
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OK, that is odd. While my experience with BTRFS RAID1 was that the FS is never |
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perfectly balanced, this is just... weird. |
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If I were you, I would ask on the BTRFS ML. |
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|
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> Metadata,RAID1: Size:9.00GiB, Used:6.96GiB |
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> /dev/sda 6.00GiB |
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> /dev/sdc 7.00GiB |
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> /dev/sdd 5.00GiB |
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|
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This I would see as perfectly possible with BTRFS RAID1. |
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|
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> System,RAID1: Size:32.00MiB, Used:464.00KiB |
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> /dev/sda 32.00MiB |
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> /dev/sdd 32.00MiB |
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> |
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> Unallocated: |
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> /dev/sda 1.55TiB |
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> /dev/sdc 47.02GiB |
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> /dev/sdd 47.99GiB |
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> rattus backups # |
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|
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HTH |
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-- |
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Marc Joliet |
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-- |
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"People who think they know everything really annoy those of us who know we |
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don't" - Bjarne Stroustrup |
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