Scale freezes and restart

[Romek U]

Server Dell R450, 64GB RAM, swap 16GB, boot 2x600GB, vm 2x600GB, Dell 745 HBA mode.

Fresh installation - Truenas Scale in UEFI mode. I've got one Windows 10 Vm. Vm is allocated 16GB memory. VirtIO disk and network drivers. Cpu host passthrough. When I'm doing a disk benchmark software test - CrystalDiskMark on the VM, the Scale memory drops to zero. The swap is at max. WebUI not responding. In logs “Device /dev/by-partuid/... is causing slow I/O on pool. After a few minutes, memory is low and the virtual machine stops. It looks like vm is taking up more than 16GB. Truenas had an unscheduled system reboot.

 

[jgreco]

Dell 745 HBA mode.

Please do not use a RAID controller with TrueNAS. Please see the following resource:

What's all the noise about HBAs, and why can't I use a RAID controller?

1) An HBA is a Host Bus Adapter. This is a controller that allows SAS and SATA devices to be attached to, and communicate directly with, a server. RAID controllers typically aggregate several disks into a Virtual Disk abstraction of some sort...

www.truenas.com

And before you start talking to me about "but it's got HBA mode" please know that this isn't what we're talking about when we say TrueNAS wants an LSI HBA. Explained in the resource.