<div dir="ltr"><div><div>Hi,<br>
<br>
My OI box is expreiencing slow zfs writes ( around 30 times slower ).
iostat reports below error though pool is healthy. This is happening in
past 4 days though no change was done to system. Is the hard disks
faulty ?<br>
Please help.<br>
<br>
<br>
# zpool status -v<br>
root@host:~# zpool status -v<br>
pool: test<br>
state: ONLINE<br>
status: The pool is formatted using a legacy on-disk format. The pool can<br>
still be used, but some features are unavailable.<br>
action: Upgrade the pool using 'zpool upgrade'. Once this is done, the<br>
pool will no longer be accessible on software that does not support feature flags.<br>
config:<br>
<br>
NAME STATE READ WRITE CKSUM<br>
test ONLINE 0 0 0<br>
raidz1-0 ONLINE 0 0 0<br>
c2t0d0 ONLINE 0 0 0<br>
c2t1d0 ONLINE 0 0 0<br>
c2t2d0 ONLINE 0 0 0<br>
c2t3d0 ONLINE 0 0 0<br>
c2t4d0 ONLINE 0 0 0<br>
raidz1-1 ONLINE 0 0 0<br>
c2t5d0 ONLINE 0 0 0<br>
c2t6d0 ONLINE 0 0 0<br>
c2t7d0 ONLINE 0 0 0<br>
c2t8d0 ONLINE 0 0 0<br>
c2t9d0 ONLINE 0 0 0<br>
raidz1-3 ONLINE 0 0 0<br>
c2t12d0 ONLINE 0 0 0<br>
c2t13d0 ONLINE 0 0 0<br>
c2t14d0 ONLINE 0 0 0<br>
c2t15d0 ONLINE 0 0 0<br>
c2t16d0 ONLINE 0 0 0<br>
c2t17d0 ONLINE 0 0 0<br>
c2t18d0 ONLINE 0 0 0<br>
c2t19d0 ONLINE 0 0 0<br>
c2t20d0 ONLINE 0 0 0<br>
c2t21d0 ONLINE 0 0 0<br>
c2t22d0 ONLINE 0 0 0<br>
c2t23d0 ONLINE 0 0 0<br>
raidz1-4 ONLINE 0 0 0<br>
c2t24d0 ONLINE 0 0 0<br>
c2t25d0 ONLINE 0 0 0<br>
c2t26d0 ONLINE 0 0 0<br>
c2t27d0 ONLINE 0 0 0<br>
c2t28d0 ONLINE 0 0 0<br>
c2t29d0 ONLINE 0 0 0<br>
c2t30d0 ONLINE 0 0 0<br>
raidz1-5 ONLINE 0 0 0<br>
c2t31d0 ONLINE 0 0 0<br>
c2t32d0 ONLINE 0 0 0<br>
c2t33d0 ONLINE 0 0 0<br>
c2t34d0 ONLINE 0 0 0<br>
c2t35d0 ONLINE 0 0 0<br>
c2t36d0 ONLINE 0 0 0<br>
c2t37d0 ONLINE 0 0 0<br>
raidz1-6 ONLINE 0 0 0<br>
c2t38d0 ONLINE 0 0 0<br>
c2t39d0 ONLINE 0 0 0<br>
c2t40d0 ONLINE 0 0 0<br>
c2t41d0 ONLINE 0 0 0<br>
c2t42d0 ONLINE 0 0 0<br>
c2t43d0 ONLINE 0 0 0<br>
c2t44d0 ONLINE 0 0 0<br>
spares<br>
c5t10d0 AVAIL <br>
c5t11d0 AVAIL <br>
c2t45d0 AVAIL <br>
c2t46d0 AVAIL <br>
c2t47d0 AVAIL <br>
<br>
<br>
<br>
# iostat -En<br>
<br>
c4t0d0 Soft Errors: 0 Hard Errors: 5 Transport Errors: 0<br>
Vendor: iDRAC Product: Virtual CD Revision: 0323 Serial No: <br>
Size: 0.00GB <0 bytes><br>
Media Error: 0 Device Not Ready: 5 No Device: 0 Recoverable: 0<br>
Illegal Request: 1 Predictive Failure Analysis: 0<br>
c3t0d0 Soft Errors: 0 Hard Errors: 0 Transport Errors: 0<br>
Vendor: iDRAC Product: LCDRIVE Revision: 0323 Serial No: <br>
Size: 0.00GB <0 bytes><br>
Media Error: 0 Device Not Ready: 0 No Device: 0 Recoverable: 0<br>
Illegal Request: 0 Predictive Failure Analysis: 0<br>
c4t0d1 Soft Errors: 0 Hard Errors: 0 Transport Errors: 0<br>
Vendor: iDRAC Product: Virtual Floppy Revision: 0323 Serial No: <br>
Size: 0.00GB <0 bytes><br>
Media Error: 0 Device Not Ready: 0 No Device: 0 Recoverable: 0<br>
<br>
<br>
root@host:~# fmadm faulty<br>
--------------- ------------------------------------ -------------- ---------<br>
TIME EVENT-ID MSG-ID SEVERITY<br>
--------------- ------------------------------------ -------------- ---------<br>
Jan 05 08:21:09 7af1ab3c-83c2-602d-d4b9-f9040db6944a ZFS-8000-HC Major <br>
<br>
Host : host<br>
Platform : PowerEdge-R810 <br>
Product_sn :<br>
<br>
Fault class : fault.fs.zfs.io_failure_wait<br>
Affects : zfs://pool=test<br>
faulted but still in service<br>
Problem in : zfs://pool=test<br>
faulted but still in service<br>
<br>
Description : The ZFS pool has experienced currently unrecoverable I/O<br>
failures. Refer to <a href="http://illumos.org/msg/ZFS-8000-HC">http://illumos.org/msg/ZFS-8000-HC</a> for<br>
more information.<br>
<br>
Response : No automated response will be taken.<br>
<br>
Impact : Read and write I/Os cannot be serviced.<br>
<br>
Action : Make sure the affected devices are connected, then run<br>
'zpool clear'.<br>
<br>
<br>
</div>Regards,<br></div><div>Ram<br></div><div><div>
<br>
<br>
</div></div></div>