I was watching my pools this morning with "zpool iostat -v 1" and noticed that every 5 seconds small writes are happening to all pools.
This does not appear to be the "system dataset" thing that comes up in the forums every once in a while.
All 3 pools are used as ESXi 6.5 datastores that are accessed via iSCSI over 10G Ethernet. I'm seeing this activity even when all VMs (including VCSA) are paused or shut down. The only time it stops is when I power down the ESXi host. When I restart the ESXi host, the "every 5 seconds" activity starts about mid-way through the "yellow screen" boot cycle.
I've confirmed that all 3 datastores have VMware's Storage I/O Control disabled.
Any idea what's causing this?
Thanks in advance!
(System: FreeNAS 11.0-U3 on Supermicro X9SRE-F with E5-1650v2, 128GB RAM, mirrored USB flash for boot disk, 3 pools, each pool has 1-2 SLOG SSDs)
This does not appear to be the "system dataset" thing that comes up in the forums every once in a while.
All 3 pools are used as ESXi 6.5 datastores that are accessed via iSCSI over 10G Ethernet. I'm seeing this activity even when all VMs (including VCSA) are paused or shut down. The only time it stops is when I power down the ESXi host. When I restart the ESXi host, the "every 5 seconds" activity starts about mid-way through the "yellow screen" boot cycle.
I've confirmed that all 3 datastores have VMware's Storage I/O Control disabled.
Any idea what's causing this?
Thanks in advance!
(System: FreeNAS 11.0-U3 on Supermicro X9SRE-F with E5-1650v2, 128GB RAM, mirrored USB flash for boot disk, 3 pools, each pool has 1-2 SLOG SSDs)