Re: Read-only FS, switch-off safety for raspberry pi

[Swift Griggs <swiftgriggs%gmail.com@localhost>]

On Thu, 16 May 2019, Mayuresh wrote:
> To conserve flash drive life, is it possible to mount all partitions 
> read-only and how?

Sure. That's how optical media works. It's read-only but uses RAM disks 
for the read/write stuff. Look at the way NetBSD live-CDs have been 
created and do the same thing.

> Further, once read-only mounts are ensured, is it safe to just switch 
> off the device by pulling the plug?

Sure. If you have your file systems mounted read-only, then they already 
have an internal flag set so that if you just pulled power, they'd show up 
as "consistent" when you rebooted and thus no fsck or log-rollback needed.