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On Thursday 06 August 2015 12:09:20 Jeremi Piotrowski wrote: |
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> On Thu, 6 Aug 2015, Peter Humphrey wrote: |
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> > First, btrfs balance. I had no idea that was needed, so of course I didn't |
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> > include it in my attempts. Could that be why, on booting, the kernel |
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> > couldn't mount the file system? |
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> |
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> I don't think that balancing an empty btrfs filesystem is necessary. It |
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> should have no effect at this point and would not affect the kernel's |
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> ability to mount the btrfs volume. |
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So that won't have been my problem then. |
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> > Second, --xattrs on the tarball extraction. I haven't seen this |
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> > recommended |
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> > before, and I wonder what extra attributes are needed for btrfs. |
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> |
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> This is part of the normal installation procedure and is not specific to |
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> btrfs. See [1]. For all I know this has always been part of the |
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> installation. |
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Well, as I said, I've never seen it before. |
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> > Third, why do you do your kernel compiling in /var/tmp/linux? It seems |
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> > like |
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> > extra work and I can't see a reason for it. |
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> |
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> The kernel developers recommend to __never__ compile the kernel as root. |
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> You never know when something like `rm -rf /` might creep into the |
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> Makefile ;) |
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Is that a real fear, or paranoia gone to extremes? :-) |
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> > Finally, can I assume that your procedure would work just as well |
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> > installing into, say, /dev/sd[ab]4? |
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> |
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> Yep, but as stated by Rich there isn't much to a btrfs raid 1 install |
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> aside from mkfs.btrfs, building btrfs support into the |
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> kernel, the slightly different fstab entry, and using an initramfs (dracut |
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> makes it easy). |
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I've done all those things several times in the past week or two and come up |
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against a kernel panic every time. |
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> I do recommend that you try it in a virtual machine first. |
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Good idea. I'll do that. Restoring the original system has been a nuisance |
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each time, what with md raid 1, lvm2 and so on. Creating a 500GB md device |
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seems to take for ever. |
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-- |
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Rgds |
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Peter |
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