7
AWC 500
System software
Robust data storage
Proven fail-safe file system (UBIFS – Unsorted Image File
System) to ensure data on the AWC 500:
► Tolerates sudden power interrupts and unclean reboots
► Recoverability – May be fully recovered if the indexing
information gets corrupted.
► Ensures data integrity – Everything written to the flash
media gets checksums.
Instant and long life storage of persistent variables is ensured
with FRAM (ferro magnetic RAM) as NOVRAM :
► High Endurance type guaranteeing 100 trillion read/
writes cycles
► 10 years storage without battery power necessary
Our new PCM5.2 relies on the ext4 file system and features
a filesystem cache that is written periodically every few
seconds, and a dedicated data area of persistent variables
is guaranteed to be persisted automatically to the mass
storage on power loss.
Primary
image
Boot
modes
Root File System (RFS)
Linux kernel
Boot loader (U-Boot)
Boot
Download
Service
Run
Backup
image
Power loss
protected
data storage
Root File System (RFS)
Linux kernel
Application File System (AFS)
NAND
NOR
FRAM
Storage technologies:
