Bacula-users

[Bacula-users] FreeBSD 9 and ZFS with compression - should be fine?

2012-02-08 21:50:08
Subject: [Bacula-users] FreeBSD 9 and ZFS with compression - should be fine?
From: Mark <bacula-list AT nerdish DOT us>
To: bacula-users AT lists.sourceforge DOT net
Date: Wed, 8 Feb 2012 20:22:46 -0600
Just checking to see if people are having success with storage daemon running on FreeBSD 9.0 with ZFS and compression enabled?  I ask because I'm having issues with the backups completing without any errors reported, but then an immediate restore attempt fails due to block checksum mismatches, or trying something like 'bls -j -v -V Full-0079 FileStorage1' will fail and exit with a block checksum mismatch.

The pool is a raidz1 made up of 5 1.5TB drives.  I can run a scrub, get a clean result, run a backup, then have a restore from that backup fail (only for larger backups, small ones seem fine).  A scrub run after that will also report errors, usually 1 or 2 out of roughly 600GB of data, and it will show them as repaired.  I'm just trying to determine if I'm being bitten by the SATA controller, it's an ' <ATI IXP700 AHCI SATA controller>' and I have to set the storage type to IDE instead of AHCI and set 'hint.ahci.0.msi=0' in loader.conf or the system can't even see the drives.  Or maybe what I'm trying here is a bad idea?  I'd just like the compression without the overhead and slowdown on the clients that comes from enabling compression in the fileset.  I'm a FreeBSD neophyte, is the SATA/AHCI stuff just not good yet or would much better results be likely with a newer board/controller?

Thanks for any info,
Mark

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