[K12OSN] why RAID?

[Jim McQuillan]

The beauty if RAID is that if a disk fails (eventually they all do),
the system keeps on running.  Then, you can take the system down after
hours and replace the drive and re-sync the raid set.

Without raid, if a disk fails, the system dies, or the data becomes
unavailable until you replace the drive and restore from a backup.

Jim McQuillan
jam at Ltsp.org




On Fri, 3 Dec 2004, Rob Owens wrote:

>
> I see a lot of posts here asking about setting up a RAID system.  My ignorance and inexperience will no doubt show through here, but why is it so important to get RAID set up?  Why not just have a cron job that makes a copy of /home or any other important directories?  It could be set to run every night, or even after every class period.  It could be set with a low priority via the "nice" command so that it doesn't interfere much with the read/write operations of users who are currently logged in.
>
> Is this a bad idea?
>
> -Rob
>
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