On 07/23 01:12 , Carl Wilhelm Soderstrom wrote:
> On 07/23 12:50 , Les Mikesell wrote:
> > I've never seen anything go wrong with Linux RAID1 over 6 or so years 
> > and dozens of machines and I've abused it with things like hot swapping 
> > SCA drives and rebuilding the replacement, cloning machines by splitting 
> > the pair and letting both rebuild a new mirror, and using a 3-member set 
> > with one normally missing for my backuppc archive.  What kind of 
> > problems have you seen?

oh, and forgot one a couple of years ago. 

- Bad interaction between ext3, software RAID (md), LVM, and the 2.4.20
  kernel. Led to filesystem corruption. I suspect this was a bug that has
  since been fixed; but I don't believe I was the only one to be bitten by
  this. 

http://lkml.org/lkml/2003/1/5/11
http://lkml.org/lkml/2003/1/5/224

So all my real software problems with md may have been fixed by now; but I'm
pretty soured on it by my experiences, and practical experience has
demonstrated to me that 3ware hardware RAID is a better value proposition
both for performance and maintenance (disk replacement speed) reasons.

-- 
Carl Soderstrom
Systems Administrator
Real-Time Enterprises
www.real-time.com

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