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