On 09/19/2016 04:36 PM, Christoph Anton Mitterer wrote:
On Mon, 2016-09-19 at 16:07 -0400, Chris Mason wrote:
That's in the blockdev command (blockdev --setro /dev/xxx).
Well, I know that ;-) ... but I bet most end-user don't (just as most
end-users assume mount -r is truly ro)...

It's a tradeoff, without the log replay traditional filesystems wouldn't be able to mount at all after a crash. Since most init systems default to ro at the beginning, it would have been awkward to introduce the logging filesystems into established systems.

16+ years later, I still feel it's still the path of least surprise.

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