EX4300 - Virtual Chassis - Master needs to be re-installed

Hi all,

we have a Virtual-Chassis containing 3 EX4300 (no mixed, no multi-gigabit) connected by the QSFP-Ports.

The Virtual-Chassis is preprovisioned. The QSFP-Ports are in default-state, which mean they are all intened to be used for building a VC.

Now we have the 2 issues:

By doing a show system partitions media internal, the system shows a "error: /dev/da0s1a is not a JUNOS snapshot" on the fpc0.

Also when doing a show system storage partitions, the system has mixed up da0s1a and da0s2a:

fpc0:
--------------------------------------------------------------------------
Boot Media: internal (da0)
Active Partition: da0s2a
Backup Partition: da0s1a
Currently booted from: active (da0s2a)

JATC recommend to do a format install on fpc0 to get the system back into normal state.

Can you please confirm the follwoing procedure:

1. Shutdown fpc0 and disconnect VC-Cables
2. Boot into loader-promt
3. Do a format-install by usb
4. Boot the fresh installed Switch
5. Check System-Partitions / create a system snapshot
6. Shutdown the switch
7. Reconnect the VC-Cables
8. Power on the Switch
9. After the switch has powered on, it should assign itself backup into the VC

Is this procedure correct ?

BR, Christoph.