update truenas with some stability and troubleshooting notes

infrastructure/graduated/truenas/truenas.md

@@ -32,17 +32,12 @@
 
 ## Bios settings
 
-These are my recommended settings that seem stable and allow GPU passthrough
+You can check the bios version with `dmidecode -t bios -q`
 
-1. Memory 3200mhz, fabric 1600mhz
-2. AC Power - On
-3. SVM - On
-4. IOMMU - On (Do not touch rebar or other pci encoding stuff)
-5. Fans 100%
-6. Initial video output: pci 3
-7. PCIE slot 1 bifurcation: 4x4x4x4
-8. Disable CSM
-9. Fast Boot Enabled
+1. Turn off all C-State or power saving features. These definitely cause instability
+   like random freezes.
+2. Turn off boosting
+3. Enable XMP
 
 ## Archiving
 
@@ -281,10 +276,11 @@ Nic options: "mtu 9000 rxcsum txcsum tso4 lro"
 Create an Init/Shutdown Script of type `Command` with the following:
 
 ```bash
-echo 34359738368 >> /sys/module/zfs/parameters/zfs_arc_max
+# Limit to 8 GiB
+echo 8589934592 >> /sys/module/zfs/parameters/zfs_arc_max
 ```
 
-Set `When` to `Pre Init`.
+Set `When` to `Post Init`.
 
 ## Certs
 
@@ -385,8 +381,14 @@ zpool status -v
 
 ```bash
 virsh -c "qemu+unix:///system?socket=/run/truenas_libvirt/libvirt-sock" list
-virsh -c "qemu+unix:///system?socket=/run/truenas_libvirt/libvirt-sock" resume <vm_name>
-virsh -c "qemu+unix:///system?socket=/run/truenas_libvirt/libvirt-sock" start <vm_i>
+export VM_NAME=
+
+# Try this first
+virsh -c "qemu+unix:///system?socket=/run/truenas_libvirt/libvirt-sock" resume $VM_NAME
+
+# Or just destroy and start it again
+virsh -c "qemu+unix:///system?socket=/run/truenas_libvirt/libvirt-sock" destroy $VM_NAME
+virsh -c "qemu+unix:///system?socket=/run/truenas_libvirt/libvirt-sock" start $VM_NAME
 ```
 
 ## Mounting ZVOLS