Interesting, It looks like a new feature. I see this in the release notes Junos OS 11.2
Autorecovery—This feature is supported on dual-partitioned SRX100, SRX210, SRX220, SRX240, and SRX650 Services Gateways. With this feature, disk partitioning, configuration, and licenses information can be recovered in case of corruption.
This feature provides the following functions:
• Detect corruptions in disk partitioning during system bootup and attempt to recover partitions automatically
• Detect corruptions in the Junos OS configuration during system bootup and attempt to recover the configuration automatically
• Detect corruptions in Junos OS licenses during system bootup and attempt to recover licenses automatically
Table 8 on page 129 lists the supported CLI commands and its description: Table 8: Supported CLI Commands for
Autorecovery
request system autorecovery state save
Saves current state of the disk partitioning, configuration, and licenses for autorecovery.
request system autorecovery state clear
Clears all saved autorecovery information.
show system autorecovery state
Performs checks and shows status of all autorecovered items.