Hi all,
new problem today, similar to a previous one with loss of access to disks inside 'dati' pool.

Feb 19 15:39:41 pg-1 lmrc: [ID 408335 kern.warning] WARNING: lmrc0: resetting...
Feb 19 15:39:42 pg-1 lmrc: [ID 408335 kern.warning] WARNING: lmrc0: resetting...
Feb 19 15:39:42 pg-1 lmrc: [ID 408335 kern.warning] WARNING: lmrc0: resetting...
Feb 19 15:39:42 pg-1 lmrc: [ID 383856 kern.warning] WARNING: lmrc0: reset failed
Feb 19 15:39:42 pg-1 lmrc: [ID 998901 kern.warning] WARNING: lmrc0: AEN failed, status = 255
Feb 19 15:39:42 pg-1 lmrc: [ID 380853 kern.warning] WARNING: lmrc0: LD target map sync failed, status = 255
Feb 19 15:39:42 pg-1 lmrc: [ID 831201 kern.warning] WARNING: lmrc0: PD map sync failed, status = 255
Feb 19 15:39:42 pg-1 lmrc: [ID 383856 kern.warning] WARNING: lmrc0: reset failed
Feb 19 15:39:43 pg-1 zfs: [ID 961531 kern.warning] WARNING: Pool 'dati' has encountered an uncorrectable I/O failure and has been sus>
Feb 19 15:39:43 pg-1 zfs: [ID 961531 kern.warning] WARNING: Pool 'dati' has encountered an uncorrectable I/O failure and has been sus>
Feb 19 15:39:43 pg-1 zfs: [ID 961531 kern.warning] WARNING: Pool 'dati' has encountered an uncorrectable I/O failure and has been sus>
Feb 19 15:39:43 pg-1 zfs: [ID 961531 kern.warning] WARNING: Pool 'dati' has encountered an uncorrectable I/O failure and has been sus>
Feb 19 15:39:43 pg-1 zfs: [ID 961531 kern.warning] WARNING: Pool 'dati' has encountered an uncorrectable I/O failure and has been sus>
Feb 19 15:39:43 pg-1 zfs: [ID 961531 kern.warning] WARNING: Pool 'dati' has encountered an uncorrectable I/O failure and has been sus>
Feb 19 15:39:43 pg-1 zfs: [ID 961531 kern.warning] WARNING: Pool 'dati' has encountered an uncorrectable I/O failure and has been sus>
Feb 19 15:39:43 pg-1 zfs: [ID 961531 kern.warning] WARNING: Pool 'dati' has encountered an uncorrectable I/O failure and has been sus>
Feb 19 15:40:10 pg-1 scsi: [ID 107833 kern.warning] WARNING: /pci@0,0/pci8086,43b8@1c/pci1590,32b@0/iport@v0/disk@5000cca85ee5ecb0,0 >
Feb 19 15:40:10 pg-1 scsi: [ID 107833 kern.warning] WARNING: /pci@0,0/pci8086,43b8@1c/pci1590,32b@0/iport@v0/disk@50014ee6b2513c38,0 >
Feb 19 15:40:10 pg-1 scsi: [ID 107833 kern.warning] WARNING: /pci@0,0/pci8086,43b8@1c/pci1590,32b@0/iport@v0/disk@5000c500aaf9b0c3,0 >
Feb 19 15:40:10 pg-1 scsi: [ID 107833 kern.warning] WARNING: /pci@0,0/pci8086,43b8@1c/pci1590,32b@0/iport@v0/disk@5000c500aaf9bf2f,0 >
Feb 19 15:40:10 pg-1 scsi: [ID 107833 kern.warning] WARNING: /pci@0,0/pci8086,43b8@1c/pci1590,32b@0/iport@v0/disk@5000cca85ee5ecb0,0 >
Feb 19 15:40:10 pg-1 scsi: [ID 107833 kern.warning] WARNING: /pci@0,0/pci8086,43b8@1c/pci1590,32b@0/iport@v0/disk@50014ee6b2513c38,0 >
Feb 19 15:40:10 pg-1 scsi: [ID 107833 kern.warning] WARNING: /pci@0,0/pci8086,43b8@1c/pci1590,32b@0/iport@v0/disk@5000c500aaf9b0c3,0 >
Feb 19 15:40:10 pg-1 scsi: [ID 107833 kern.warning] WARNING: /pci@0,0/pci8086,43b8@1c/pci1590,32b@0/iport@v0/disk@5000c500aaf9bf2f,0 >
Feb 19 15:40:46 pg-1 fmd: [ID 377184 daemon.error] SUNW-MSG-ID: ZFS-8000-FD, TYPE: Fault, VER: 1, SEVERITY: Major#012EVENT-TIME: Mon >
Feb 19 15:40:46 pg-1 fmd: [ID 377184 daemon.error] SUNW-MSG-ID: ZFS-8000-FD, TYPE: Fault, VER: 1, SEVERITY: Major#012EVENT-TIME: Mon >
Feb 19 15:40:47 pg-1 fmd: [ID 377184 daemon.error] SUNW-MSG-ID: ZFS-8000-FD, TYPE: Fault, VER: 1, SEVERITY: Major#012EVENT-TIME: Mon >
Feb 19 15:40:47 pg-1 fmd: [ID 377184 daemon.error] SUNW-MSG-ID: ZFS-8000-FD, TYPE: Fault, VER: 1, SEVERITY: Major#012EVENT-TIME: Mon >
Feb 19 15:42:44 pg-1 unix: [ID 836849 kern.notice] #012#015panic[cpu0]/thread=fffffeb1f5b1e100:
Feb 19 15:42:44 pg-1 genunix: [ID 156897 kern.notice] forced crash dump initiated at user request
Feb 19 15:42:44 pg-1 unix: [ID 100000 kern.notice] #012

I've forced a kernel dump which can be seen here.

https://mega.nz/file/ojVHjQyI#63qlDThAL3FvM4pB04QmkjraMh4hoKXmaN5aHyC3-UU

Today, when the problem arised, I had just iozone running "alone".

Regards.
Maurilio.