Re: raid is dangerous but that's secret (was Re: [patch] ext2/3:document conditions when reliable operation is possible)

From: Pavel Machek
Date: Sat Sep 05 2009 - 06:34:55 EST


> > If it only was this simple. We don't have 'check brakes' (aka
> > 'journalling ineffective') warning light. If we had that, I would not
> > have problem.
> But we do; comptently designed (and in the cast of software RAID,
> competently packaged) RAID subsystems send notifications to the system
> administrator when there is a hard drive failure. Some hardware RAID
> systems will send a page to the system administrator. A mid-range
> Areca card has a separate ethernet port so it can send e-mail to the
> administrator, even if the OS is hosed for some reason.

Well, my MMC/uSD cards do not have ethernet ports to remind me that
they are unreliable :-(.
(cesky, pictures)
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