for the record from slack - i have reproduced issue on real hw with local SAS drives attached to LSI 3008
```igork@sshgate:~$ ssh [email protected] DilOS (based on illumos) Version 1.3.7.202-20170911-3+462 2017-09-11 root@shelf1:~# diskinfo TYPE DISK VID PID SIZE RMV SSD SCSI c0t5000CCA05CDB8C6Cd0 HGST HUS724040ALS640 3726.02 GiB no no SCSI c0t5000CCA05CDCE150d0 HGST HUS724040ALS640 3726.02 GiB no no SCSI c0t5000CCA05CDDE17Cd0 HGST HUS724040ALS640 3726.02 GiB no no SCSI c0t5000CCA05CDE3DCCd0 HGST HUS724040ALS640 3726.02 GiB no no SCSI c0t5000CCA05CDEE470d0 HGST HUS724040ALS640 3726.02 GiB no no SCSI c0t5000CCA05CDFCAD0d0 HGST HUS724040ALS640 3726.02 GiB no no SCSI c0t5000CCA05CDFFA34d0 HGST HUS724040ALS640 3726.02 GiB no no SCSI c0t5000CCA05CDE4710d0 HGST HUS724040ALS640 3726.02 GiB no no SCSI c0t5000CCA05CDF3E94d0 HGST HUS724040ALS640 3726.02 GiB no no SCSI c0t5000CCA05CDE2DD8d0 HGST HUS724040ALS640 3726.02 GiB no no SCSI c0t5000CCA05CDFBD90d0 HGST HUS724040ALS640 3726.02 GiB no no SCSI c0t5000CCA05CDD6994d0 HGST HUS724040ALS640 3726.02 GiB no no SCSI c0t5000CCA05CDBC198d0 HGST HUS724040ALS640 3726.02 GiB no no SCSI c0t5000CCA05CDEF18Cd0 HGST HUS724040ALS640 3726.02 GiB no no SCSI c0t5000CCA05CE01870d0 HGST HUS724040ALS640 3726.02 GiB no no SCSI c0t5000CCA05CDF3E90d0 HGST HUS724040ALS640 3726.02 GiB no no SCSI c0t5000CCA05CE024B8d0 HGST HUS724040ALS640 3726.02 GiB no no SCSI c0t5000CCA05CDFA804d0 HGST HUS724040ALS640 3726.02 GiB no no SCSI c0t5000CCA05CE01140d0 HGST HUS724040ALS640 3726.02 GiB no no SCSI c0t5000CCA05CDEDBF8d0 HGST HUS724040ALS640 3726.02 GiB no no SCSI c0t5000CCA05CDCDD04d0 HGST HUS724040ALS640 3726.02 GiB no no SCSI c0t5000CCA05CDEA3E4d0 HGST HUS724040ALS640 3726.02 GiB no no SCSI c0t5000CCA05CE087E4d0 HGST HUS724040ALS640 3726.02 GiB no no SCSI c0t5000CCA05CDCEC70d0 HGST HUS724040ALS640 3726.02 GiB no no SCSI c0t5000CCA05CDE3400d0 HGST HUS724040ALS640 3726.02 GiB no no SCSI c0t5000CCA05CCB0D1Cd0 HGST HUS724040ALS640 3726.02 GiB no no SCSI c0t5000CCA05CDFD6ECd0 HGST HUS724040ALS640 3726.02 GiB no no SCSI c0t5000CCA05CDF6CE0d0 HGST HUS724040ALS640 3726.02 GiB no no SCSI c0t5000CCA05CDCB2E0d0 HGST HUS724040ALS640 3726.02 GiB no no SCSI c0t5000CCA05CDD7744d0 HGST HUS724040ALS640 3726.02 GiB no no SCSI c0t5000CCA05CD51290d0 HGST HUS724040ALS640 3726.02 GiB no no SCSI c0t5000CCA05CBD5FD4d0 HGST HUS724040ALS640 3726.02 GiB no no SCSI c0t5000CCA05CDEA4B0d0 HGST HUS724040ALS640 3726.02 GiB no no SCSI c0t5000CCA05CD9A354d0 HGST HUS724040ALS640 3726.02 GiB no no SCSI c0t5000CCA05CD39D18d0 HGST HUS724040ALS640 3726.02 GiB no no SCSI c0t5000CCA05CDD9ED4d0 HGST HUS724040ALS640 3726.02 GiB no no UNKNOWN c1t0d0 INTEL SSDSC2BB120G4 111.79 GiB no yes UNKNOWN c1t1d0 INTEL SSDSC2BB120G4 111.79 GiB no yes root@shelf1:~# zpool create tst3 c0t5000CCA05CD39D18d0 c0t5000CCA05CD9A354d0 c0t5000CCA05CDEA4B0d0 c0t5000CCA05CBD5FD4d0 root@shelf1:~# zpool list -v NAME SIZE ALLOC FREE EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT d36 3.62T 2.61M 3.62T - 0% 0% 1.00x ONLINE - c0t5000CCA05CDD9ED4d0 3.62T 2.61M 3.62T - 0% 0% rpool 111G 20.8G 90.2G - 1% 18% 1.00x ONLINE - c1t0d0 111G 20.8G 90.2G - 1% 18% tst3 14.5T 96K 14.5T - 0% 0% 1.00x ONLINE - c0t5000CCA05CD39D18d0 3.62T 36K 3.62T - 0% 0% c0t5000CCA05CD9A354d0 3.62T 24K 3.62T - 0% 0% c0t5000CCA05CDEA4B0d0 3.62T 0 3.62T - 0% 0% c0t5000CCA05CBD5FD4d0 3.62T 36K 3.62T - 0% 0% root@shelf1:~# sudo zfs create -o logbias=throughput -o sync=always -V 64M tst3/space4 root@shelf1:~# ls /dev/zvol/rdsk/tst3/space4 /dev/zvol/rdsk/tst3/space4 root@shelf1:~# sudo fio --filename=/dev/zvol/rdsk/tst3/space4 --sync=1 --rw=write --bs=1K --numjobs=8 --iodepth=1 --size=10MB --name=panic panic: (g=0): rw=write, bs=1K-1K/1K-1K/1K-1K, ioengine=psync, iodepth=1 ... fio-2.10 clock setaffinity failed: No such process clock setaffinity failed: No such process clock setaffinity failed: Operation not supported clock setaffinity failed: No such process clock setaffinity failed: No such process clock setaffinity failed: No such process clock setaffinity failed: No such process clock setaffinity failed: No such process clock setaffinity failed: No such process clock setaffinity failed: No such process clock setaffinity failed: No such process clock setaffinity failed: Operation not supported clock setaffinity failed: Operation not supported clock setaffinity failed: No such process clock setaffinity failed: No such process clock setaffinity failed: No such process clock setaffinity failed: No such process clock setaffinity failed: No such process clock setaffinity failed: No such process clock setaffinity failed: Operation not supported clock setaffinity failed: No such process clock setaffinity failed: No such process Starting 8 processes Jobs: 8 (f=8): [W(8)] [2.2% done] [0KB/368KB/0KB /s] [0/368/0 iops] [eta 03m:42s] -- You are receiving this because you are subscribed to this thread. 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