I suspect this is a bug in raidz error reporting. With a mirror,
each copy either checksums correctly or it doesn't, so we know
which drives gave us bad data. With RAID-Z, we have to infer
which drives have damage. If the number of drives returning bad
data is less than or equal to the number of
Kevin wrote:
> We'll try running all of the diagnostic tests to rule out any other issues.
Does the server have ECC memory? Many x86 systems do not :-(
> But my question is, wouldn't I need to see at least 3 checksum errors on the
> individual devices in order for there to be a visible error in
We'll try running all of the diagnostic tests to rule out any other issues.
But my question is, wouldn't I need to see at least 3 checksum errors on the
individual devices in order for there to be a visible error in the top level
vdev? There doesn't appear to be enough raw checksum errors on the
On 28 July, 2007 - Marc Bevand sent me these 0,7K bytes:
> Matthew Ahrens sun.com> writes:
> >
> > So the errors on the raidz2 vdev indeed indicate that at least 3 disks
> > below
> > it gave the wrong data for a those 2 blocks; we just couldn't tell which 3+
> > disks they were.
>
> Somethi
Matthew Ahrens sun.com> writes:
>
> So the errors on the raidz2 vdev indeed indicate that at least 3 disks below
> it gave the wrong data for a those 2 blocks; we just couldn't tell which 3+
> disks they were.
Something must be seriously wrong with this server. This is the first time I
see an
Kevin wrote:
> After a scrub of a pool with 3 raidz2 vdevs (each with 5 disks in them) I see
> the following status output. Notice that the raidz2 vdev has 2 checksum
> errors, but only one disk inside the raidz2 vdev has a checksum error. How is
> this possible? I thought that you would have to
Here's some additional output from the zpool and zfs tools:
$ zpool list
NAMESIZEUSED AVAILCAP HEALTH ALTROOT
tank 10.2T 8.58T 1.64T83% ONLINE -
$ zfs list
NAME USED AVAIL REFER MOUNTPOINT
tank
After a scrub of a pool with 3 raidz2 vdevs (each with 5 disks in them) I see
the following status output. Notice that the raidz2 vdev has 2 checksum errors,
but only one disk inside the raidz2 vdev has a checksum error. How is this
possible? I thought that you would have to have 3 errors in the
