Read-Only File System Considerations
DRIVE OS Linux file systems are supported to be mounted read-only when required by users.
When DRIVE OS Linux Initramfs sees file systems that are mounted read-only, it enables
access to a scratch partition gos0-rw-overlay of size 1 GB to receive the writes on the
file system paths: /var
, /tmp
, /home
,
/etc
. This scratch partition is not persistent across flashing and
gets wiped during flashing.
For more information, see DM-Verity and Read-Only File System Support.
Note: The read-only file system does not affect the support for
persistent partitions. The mounts for persistent partitions for user metadata and user
data are stacked on top of the gos0-rw-overlay partition. Therefore, writes
/etc/
and /home
directly go to their respective
persistent partitions instead of the gos0-rw_overlay partition.