constant zfs data corruption

Jeremy Chadwick koitsu at
Mon Oct 20 10:19:29 PDT 2008

On Mon, Oct 20, 2008 at 10:03:14AM -0700, Chuck Swiger wrote:
> On Oct 20, 2008, at 9:48 AM, Jeremy Chadwick wrote:
>> Hm... I thought we determined earlier in this thread that the OP is  
>> not
>> getting the benefits of ZFS checksums because he's not using raidz  
>> (only
>> a single disk with a single pool)?
> He's not getting working filesystem redundancy with the existing config 
> and is vulnerable to losing data from a single drive failure, agreed.  
> But the ZFS checksum mechanism should still be working to detect data 
> corruption, even though ZFS cannot recover the corrupted data the way it 
> otherwise would if redundancy was available.

Ahh, I see.  So to paraphrase, ZFS can detect checksum errors (data
corruption) using any pool type (single disk, mirror, raidz, whatever),
but can only *repair* the error when using a mirror or raidz.

| Jeremy Chadwick                                jdc at |
| Parodius Networking              |
| UNIX Systems Administrator                  Mountain View, CA, USA |
| Making life hard for others since 1977.              PGP: 4BD6C0CB |

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