ZFS License and Future

Svein Skogen (Listmail account) svein-listmail at stillbilde.net
Mon Nov 8 20:02:04 UTC 2010

On 08.11.2010 18:47, Arthur Chance wrote:
> Presuming you're talking about ZFS, the hash isn't intended to correct
> hardware errors, it's only there to detect them. Correction comes from
> mirroring or the use of RAIDZ{1,2,3}. (I have personal experience of how
> well that works, as I had a disk in a RAIDZ array go bad suddenly, and I
> didn't lose any data.) Any new solution would almost certainly mimic
> ZFS's approach of arranging the data as a Merkel tree, and using
> multiple copies or N out of M shares for correction. I'm not sure GEOM's
> block orientation fits well with Merkel trees though, although I'd be
> happy to be corrected by a GEOM expert.

No, I'm talking about knowing that a file has been corrupted is a little
better than not knowing it has been corrupted. But it still won't help
bring back the file.

And I'm ... all too familiar with redundancy strategies (and backups).
Including their shortcomings. Speaking of which: Has there been any
progress on properly backing up ZFS on FreeBSD yet? (including the metadata)


  /"\   |Svein Skogen       | svein at d80.iso100.no
  \ /   |Solberg Østli 9    | PGP Key:  0xE5E76831
   X    |2020 Skedsmokorset | svein at jernhuset.no
  / \   |Norway             | PGP Key:  0xCE96CE13
        |                   | svein at stillbilde.net
 ascii  |                   | PGP Key:  0x58CD33B6
 ribbon |System Admin       | svein-listmail at stillbilde.net
Campaign|stillbilde.net     | PGP Key:  0x22D494A4
        |msn messenger:     | Mobile Phone: +47 907 03 575
        |svein at jernhuset.no | RIPE handle:    SS16503-RIPE
A: Because it fouls the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing on usenet and in e-mail?
                     Picture Gallery:

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 260 bytes
Desc: OpenPGP digital signature
Url : http://lists.freebsd.org/pipermail/freebsd-questions/attachments/20101108/c3fa316d/signature.pgp

More information about the freebsd-questions mailing list