→ Applies to: SynetoOS 4.x

Step 1. Connect to SynetoOS appliance via SSH as admin

ssh admin@<your_ip_address_or_hostname>

Step 2. Become Super User

sudo su

Step 3. Create a new folder for the logs

mkdir /var/crash

Step 4. Increase dump space parameter

zfs set volsize=16G rpool/dump

Step 5. Set up the dump

dumpadm -c all -y -z on -s /var/crash

EXAMPLE of output

    Dump content: all pages
    Dump device: /dev/zvol/dsk/rpool/dump (dedicated)
    Savecore directory: /var/crash
    Savecore enabled: yes
    Save compressed: on

Step 6. Save the dump

savecore

Step 7. Unzip the kernel dump to extract the image 

savecore -vf /var/crash/vmdump.0

Step 8. Start the kernel debugger on the crash dump

cd /var/crash/

mdb -k unix.0 vmcore.0

Step 9. Print kernel panic information

::panicinfo
$C

Step 10. Exit the kernel debugger

Ctrl+D