I've reported this in the past, and have seen a related thread but no
resolution so far and I'm still seeing it. Any help really would be very
much appreciated.

We have three thumpers (X4500):
* thumper0 - Running snv_76
* thumper1 - Running snv_121
* thumper2 - Running Solaris 10 update 7

Each has exactly the same disk and zpool configuration, and was bought at
the same time.

thumper0 sends snapshots hourly to thumpers 1 and 2. It is relatively
stable. It's running a very old firmware but we aren't keen to update as
this is our live service system.

thumper1 regularly hangs during a receive - maybe after 1-2.5 days of
hourly receives. All zfs commands on the filesystem receiving the data hang
unrecoverably and only a hard system reset or a reboot -n (do not sync
disks) will allow the machine to return to service.
It's running the most recent system firmware.

thumper2 was previously running snv_110-112 (or thereabouts) and was also
experiencing exactly the same issues until I `downgraded' to Sol 10u6/7, at
which point it began to work perfectly and hasn't experienced any major
issues since.
It's running the most recent system firmware.
Unfortunately, the zpool and zfs versions are too high to downgrade
thumper1 too.

I've tried upgrading thumper1 to 117 and now 121. We were originally
running 112. I'm still seeing exactly the same issues though.

What can I do in an attempt to find out what is causing these lockups?

Thanks in advance,

Andrew Nicols

-- 
Systems Developer

e: andrew.nic...@luns.net.uk
im: a.nic...@jabber.lancs.ac.uk
t: +44 (0)1524 5 10147

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