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ZFS Forensics – Recovering Files From a Destroyed Zpool

76 points by res0nat0r 13y ago

insaneirish 13y ago
The more we all use ZFS, the better. I truly hope ZFS on Linux keeps up the momentum it has, because it will increase the value of the overall ZFS knowledge base (like this post). For more interesting topics by Mr. Bruning, I encourage you to look through the past "Bruning Questions" posts: https://www.google.com/search?q=bruning+questions+site:joyent.com&nfpr=1 https://www.google.com/search?q=bruning+questions+site:joyen...
- BrainInAJar 13y ago
  > it will increase the value of the overall ZFS knowledge base (like this post). Joyent uses ZFS on illumos exclusively. Not Linux
  - res0nat0r 13y ago
    ZFS is now available on Linux via FUSE actually.
    - dagw 13y ago
      How does that compare, performance wise, to a 'real' ZFS implementation like on Solaris or FreeBSD?
      - res0nat0r 13y ago
        Honestly I can't say. I've only done basic tinkering on Linux to see if the basic functionality works...sorry.
      - roto 13y ago
        The fuse one is not terribly fast, as expected. I think this is what you're really looking for: http://zfsonlinux.org/ http://zfsonlinux.org/ Basically the standard ZFS driver with a shim for the kernel.
        StavrosK 13y ago
        I use that and it has been amazing so far.
  - insaneirish 13y ago
    I'm aware of Joyent's ZFS use on illumos and not Linux. What I meant is that ZFS on Linux has the chance to make ZFS become even more popular than it is already on illumos, FreeBSD, and Oracle platforms.
voltagex_ 13y ago
TempleOS is reading HN today...
herf 13y ago
When I'm root, rm asks if I want to delete a file. zpool destroy does not believe in asking.
- thwarted 13y ago
  Only because something set up an alias when you're root to pass -i to rm.
- kalleboo 13y ago
  That's your distro's default aliases talking ~$ whoami root ~$ touch test ~$ rm test ~$
- harrytuttle 13y ago
  Should it ask? You typed it! UNIX is unforgiving by default. Think before you type.
tbenst 13y ago
Have used ZFS on Linux, FreeBSD and OpenSolaris for a few years now. Had a few startles with 'unrecoverable' zpool failures on both Linux & FreeBSD that were easily fixable with a OpenSolaris LiveCD. When operating a zpool, shouldn't matter too much which OS you're on, but do yourself a favor and use the OpenSolaris LiveCD with the latest zpool version if you need to do any sort of recovery.
- zeckalpha 13y ago
  https://en.wikipedia.org/wiki/Pro-drop_language https://en.wikipedia.org/wiki/Pro-drop_language

76 points by res0nat0r 13y ago

The more we all use ZFS, the better. I truly hope ZFS on Linux keeps up the momentum it has, because it will increase the value of the overall ZFS knowledge base (like this post). For more interesting topics by Mr. Bruning, I encourage you to look through the past "Bruning Questions" posts: https://www.google.com/search?q=bruning+questions+site:joyent.com&nfpr=1 https://www.google.com/search?q=bruning+questions+site:joyen...

BrainInAJar 13y ago
> it will increase the value of the overall ZFS knowledge base (like this post). Joyent uses ZFS on illumos exclusively. Not Linux
- res0nat0r 13y ago
  ZFS is now available on Linux via FUSE actually.
  - dagw 13y ago
    How does that compare, performance wise, to a 'real' ZFS implementation like on Solaris or FreeBSD?
    - res0nat0r 13y ago
      Honestly I can't say. I've only done basic tinkering on Linux to see if the basic functionality works...sorry.
    - roto 13y ago
      The fuse one is not terribly fast, as expected. I think this is what you're really looking for: http://zfsonlinux.org/ http://zfsonlinux.org/ Basically the standard ZFS driver with a shim for the kernel.
      - StavrosK 13y ago
        I use that and it has been amazing so far.
- insaneirish 13y ago
  I'm aware of Joyent's ZFS use on illumos and not Linux. What I meant is that ZFS on Linux has the chance to make ZFS become even more popular than it is already on illumos, FreeBSD, and Oracle platforms.

voltagex_ 13y ago

TempleOS is reading HN today...

herf 13y ago

When I'm root, rm asks if I want to delete a file. zpool destroy does not believe in asking.

thwarted 13y ago
Only because something set up an alias when you're root to pass -i to rm.
kalleboo 13y ago
That's your distro's default aliases talking ~$ whoami root ~$ touch test ~$ rm test ~$
harrytuttle 13y ago
Should it ask? You typed it! UNIX is unforgiving by default. Think before you type.

tbenst 13y ago

Have used ZFS on Linux, FreeBSD and OpenSolaris for a few years now. Had a few startles with 'unrecoverable' zpool failures on both Linux & FreeBSD that were easily fixable with a OpenSolaris LiveCD. When operating a zpool, shouldn't matter too much which OS you're on, but do yourself a favor and use the OpenSolaris LiveCD with the latest zpool version if you need to do any sort of recovery.

zeckalpha 13y ago
https://en.wikipedia.org/wiki/Pro-drop_language https://en.wikipedia.org/wiki/Pro-drop_language