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From: Richard Weinberger <richard@sigma-star.at>
To: Rock Lee <rockdotlee@gmail.com>
Cc: Richard Weinberger <richard.weinberger@gmail.com>,
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Subject: Re: Detach the ubi device of rootfs
Date: Tue, 10 Oct 2017 09:33:27 +0200
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Am Dienstag, 10. Oktober 2017, 04:02:09 CEST schrieb Rock Lee:
> > Why do you think you need to detach upon reboot?
> > UBI and UBIFS are designed to face power-cuts at any time.
> > Although, sane setups with initramfs/systemd unmount also the rootfs
> > upon reboot.
> 
> When reboot, UBIFS will be remount as read-only, from the filesystem
> part, it is safe, because there is no data write to it.  I see ubi
> background thread will exit when ubi detach, and there would no
> scrubing anymore, I am sure reboot after detach is safe enough in UBI
> layer. I am just curious what will happen when reboot the system while
> ubi is scrubing. Will it damage the flash if this situation happens a
> lot?

Scrubbing is an atomic operation, just like copying a LEB.
What problem do you have in mind?

Thanks,
//richard

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