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On Tue, 2011-03-15 at 15:26 +0000, James wrote: |
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> Bill Kenworthy <billk <at> iinet.net.au> writes: |
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> |
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> |
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> > I have recently added a WD 2TB green drive to two systems and am finding |
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> > terrible performance with btrfs on an LVM using these drives. |
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> |
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> Hmmmm, I've been contemplating btrfs on some new installs |
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> with the eventual goal of a CEPH network file system, on top |
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> of ext4 and/or btrfs. Is this issue just with the drivers, or |
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> related to btrfs too? |
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> |
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same plan as mine :) |
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> How is btrfs , from the "driver's seat"? |
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> |
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Some early corruption that was due to a failing (old/ancient) HD - |
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easily fixed using online fsck until I realised it was caused by the |
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hardware and removed the drive (actually it finally died!). I have had |
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one instance of a more serious corruption caused by some bug in btrfs |
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that needed the latest btrfsck from git to fix offline - later kernels |
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do not suffer from this apparently. |
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Otherwise I have been hammering it as a dirvish backup server and except |
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for speed its fine - and I wont be able to confirm that the speed issue |
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is btrfs's fault until I get the partitioning correct - and dirvish is |
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somewhat unique in what it does so it could be a special case. |
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> Does this aberration you detail, extend to the Green Seagate 2T drives? |
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> |
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No idea :) |
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> > I just saw on the mythtv list about the sector size problem these drives |
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> |
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> Can you give a precise link to this list or can I follow it (read only) |
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> via net news? (if so what is the news group name)? |
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google for adf and 4k sectors |
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> |
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> I'd like to read up on this issue, as I have several gentoo installs |
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> (very soon) that will have RAID1 using (2) ST 2T green drives. |
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> |
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> Alternative RAID configs and performance/reliability results is |
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> also of keen interest to many; so thanks for posting about these |
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> issues. |
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> |
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> |
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> James |
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> |
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> |
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Read up about raid and the model of green drive you are contemplating - |
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not all are compatible from what I have read. |
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Billk |
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