[OpenIndiana-discuss] ZFS single drive CKSUM errors

[Michelle Knight]

Hi Folks,

Something I don't understand.

A single drive with a ZFS partition on it. No mirror, no raid, no nothing.

I copied a load of files to it and did a scrub.

It encountered six checksum errors and was able to recover from them ... 
without having any mirror or other redundant reference ... it didn't lose a 
single file.

Now ... am I mad, or does this mean I've got corruption somewhere, or how did 
ZFS manage to recover from cksum errors that it detected on a single drive?

I haven't managed to read anything yet which goes to the depth of explaining 
this.

Can someone help me on this please?

Many thanks,

Michelle.