On PTX10004 router, customer encountered with Minor alarm Host 0 System boot from snapshot device.
Device has the following alarm
root@PTX10004-re0> show system alarms
1 alarms currently active
Alarm time Class Description
2024-02-23 17:13:57 UTC Minor Host 0 System boot from snapshot device
root@PTX10004-re0> show system snapshot
-------------------------------
node: re0
Current snapshot device: /dev/sda
Snapshot boot device: sda
List of installed version(s) in Snapshot boot device sda:
[1] -> junos-evo-install-ptx-x86-64-21.4R3-S3.6-EVO - [2024-02-23 17:06:48]
[2] < junos-evo-install-ptx-x86-64-20.4R2-S2.10-EVO - [2024-02-23 17:08:30]
'-' running version
'>' next boot version after upgrade/downgrade
'<' rollback boot version
node: re1
Current snapshot device: /dev/sdb
Snapshot boot device: sdb
List of installed version(s) in Snapshot boot device sdb:
[1] -> junos-evo-install-ptx-x86-64-21.4R3-S3.6-EVO - [2024-02-23 17:02:20]
[2] < junos-evo-install-ptx-x86-64-20.4R2-S2.10-EVO - [2024-02-23 17:03:53]
On a PTX10004 router, the following minor alarm was seen: user@PTX10004-re0> show system alarms1 alarms currently activeAlarm time Class Description2024-02-23 17:13:57 UTC Minor Host 0 System boot from snapshot device
PTX10004 receives an alarm Minor Host 0 System boot from snapshot device.
Incorrect boot sequence was configured. The router was booting from snapshot. Checking the device boot sequence will fix the issue and alarm will be cleared. Device will be booting from primary disk, with no alarm. You can follow the below steps to check and correct the boot sequence.
Reboot the router
Press ESC and select the boot column
Check for the primary sequence, in case primary disk is other than disk 1, then select disk 1 as an primary device for boot-up.
Save and exit from the router BIOS setting.
Reboot the router and verify that the router is booting from the correct disk and the alarm is cleared.