RAID 1

Craig321

Craig321

Craig321

Soldato
Joined
2 May 2004
Posts
19,950
In my next PC I build I thought I definitely want some sort of backup, or at least a proper backup solution (I've decided I'll be getting 2 identical disks to do some sort of mirror).

I looked at RAID 1 - the one that if the disk fails then the PC will fall back on to the mirror and carry on working as normal.

I'm nowhere near buying this PC, I don't have nearly enough money & want to get a laptop first... but I've still decided I want RAID or something on it :p

Anyway, I had some questions about RAID 1.

So it makes a perfect mirror of your first disk onto an identical second disk, right? If one disk was to fail then the PC should automatically fall back on to the second disk... but that would only apply for hardware failure... ?

If I was to delete or corrupt some important system files would RAID replicate that damage onto the second disk and make them both non-bootable? Or is it possible only 'RAID backup' every month or so when you're sure the system is stable?

Craig.
 
You are correct up to here:

If I was to delete or corrupt some important system files would RAID replicate that damage onto the second disk and make them both non-bootable? Or is it possible only 'RAID backup' every month or so when you're sure the system is stable?
Click to expand...
No. RAID is not backup. It is protection against hardware failure.

In RAID 1, a chunk of data is written to two disks (instead of one as in a normal disk system). So yes, if one disk fails then you just use the second. But if you delete a file, it's deleted from both disks :)
 
Beansprout said:
You are correct up to here:


No. RAID is not backup. It is protection against hardware failure.

In RAID 1, a chunk of data is written to two disks (instead of one as in a normal disk system). So yes, if one disk fails then you just use the second. But if you delete a file, it's deleted from both disks :)
Click to expand...

Hmm, okay, so not really a good method for 'data protection'.

I'll probably just go for the manual Acronis mirror every week then on my next PC :)

Thanks for the help,
Craig.
 
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