[CentOS] Growing RAID5 on CentOS 4.6

Ross S. W. Walker RWalker at medallion.com
Fri Aug 22 18:50:29 UTC 2008


John R Pierce wrote:
> Stephen Harris wrote:
> >           A RAID-5 set can be expanded by adding extra drives. This
> >           requires "restriping" the array which means (almost) every
> >           block must be written to a different place.
> >
> >           This option allows such restriping to be done while the array
> >           is online.
> >   
> 
> thats also a very risky operation as its extremely difficult to make it 
> restartable in case of a mishap during hte many-hours-long restriping 
> operation.   I wouldn't undertake this on any production system without 
> a full backup first.

It would probably be faster to backup, rebuild and restore too...

Besides saying it is available in the latest kernels is like saying
it's available in another OS... That's nice, but does nobody here
any good.


-Ross

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