Re: How does btrfs handle bad blocks in raid1?

[Roman Mamedov <rm@romanrm.net>]

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On Tue, 14 Jan 2014 12:29:28 -0800
George Mitchell <george@chinilu.com> wrote:

> what we are lacking at this point is a SMART capability to provide 
> visual notifications to the user when any hard drive starts to seriously 
> degrade or suddenly fails.

You can configure smartd (from smartmontools) to send you E-Mails on any
change of the monitored SMART attributes.

> If SMART were capable of launching pop up warnings

And I'm sure there are a number of GUI tools out there for just about any OS,
which can do just that

> btrfs would not have to worry so much about arrays going simplex undetected.

That said, do not fall into a false sense of security relying on proprietary,
barely if ever updated after the device has been shipped, and often very
peculiar-behaving SMART routines inside the black-box HDD firmware as your
most important data safeguard.

Of course SMART must be checked and monitored, but don't delude yourself into
thinking it will always warn you of anything going wrong well in advance of
failure, or even at all.

-- 
With respect,
Roman

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