On May 10, 2010, at 4:46 PM, John Balestrini wrote:
Recently I had a similar issue where the pool wouldn't import and
attempting to import it would essentially lock the server up.
Finally I used pfexec zpool import -F pool1 and simply let it do
it's thing. After almost 60 hours the imported finished and all has
been well since (except my backup procedures have improved!).
Hey John,
thanks a lot for answering -- I already allowed the "zpool import"
command to run from Friday to Monday and it did not complete -- I also
made sure to start it using "truss" and literally nothing has happened
during that time (the truss output file does not have anything new).
While the "zpool import" command runs, I don't see any CPU or Disk I/O
usage. "zpool iostat" shows very little I/O too:
# zpool iostat -v
capacity operations bandwidth
pool used avail read write read write
------------ ----- ----- ----- ----- ----- -----
backup 31.4T 19.1T 11 2 29.5K 11.8K
raidz1 11.9T 741G 2 0 3.74K 3.35K
c3t102d0 - - 0 0 23.8K 1.99K
c3t103d0 - - 0 0 23.5K 1.99K
c3t104d0 - - 0 0 23.0K 1.99K
c3t105d0 - - 0 0 21.3K 1.99K
c3t106d0 - - 0 0 21.5K 1.98K
c3t107d0 - - 0 0 24.2K 1.98K
c3t108d0 - - 0 0 23.1K 1.98K
raidz1 12.2T 454G 3 0 6.89K 3.94K
c3t109d0 - - 0 0 43.7K 2.09K
c3t110d0 - - 0 0 42.9K 2.11K
c3t111d0 - - 0 0 43.9K 2.11K
c3t112d0 - - 0 0 43.8K 2.09K
c3t113d0 - - 0 0 47.0K 2.08K
c3t114d0 - - 0 0 42.9K 2.08K
c3t115d0 - - 0 0 44.1K 2.08K
raidz1 3.69T 8.93T 3 0 9.42K 610
c3t87d0 - - 0 0 43.6K 1.50K
c3t88d0 - - 0 0 43.9K 1.48K
c3t89d0 - - 0 0 44.2K 1.49K
c3t90d0 - - 0 0 43.4K 1.49K
c3t91d0 - - 0 0 42.5K 1.48K
c3t92d0 - - 0 0 44.5K 1.49K
c3t93d0 - - 0 0 44.8K 1.49K
raidz1 3.64T 8.99T 3 0 9.40K 3.94K
c3t94d0 - - 0 0 31.9K 2.09K
c3t95d0 - - 0 0 31.6K 2.09K
c3t96d0 - - 0 0 30.8K 2.08K
c3t97d0 - - 0 0 34.2K 2.08K
c3t98d0 - - 0 0 34.4K 2.08K
c3t99d0 - - 0 0 35.2K 2.09K
c3t100d0 - - 0 0 34.9K 2.08K
------------ ----- ----- ----- ----- ----- -----
Also, the third "raidz" entry shows less "write" in bandwidth (610).
This is actually the first time it's a non-zero value.
My last attempt to import it, was using this command:
zpool import -o failmode=panic -f -R /altmount backup
However it did not panic. As I mentioned in the first message, it
mounts 189 filesystems and hangs on #190. While the command is
hanging, I can use "zfs mount" to mount filesystems #191 and above
(only one filesystem does not mount and causes the import procedure to
hang).
Before trying the command above, I was using only "zpool import
backup", and the "iostat" output was showing ZERO for the third raidz
from the list above (not sure if that means something, but it does
look odd).
I'm really on a dead end here, any help is appreciated.
Thanks,
Eduardo Bragatto.
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