Re: High Availability... again

[Russell Coker <russell@coker.com.au>]

On 2000-10-11 05:49, Roger Abrahamsson wrote:
>First of all, thanx for all the answers, I've gotten a bit further now.
>One thing I'm thinking of.. Does anyone know any hardware or software for
>Linux that allows an existing RAID system to be grown/shrunken later on?
>Would be a shame having this nice system up and running and then stop when
>we run out of disk space..

LVM does growing and shrinking.  I believe that it has (or is destined to 
have) mirroring support (which is far from full RAID support).  I doubt that 
LVM is what you want to use for RAID type functionality.

For changing the size of a software RAID partition in Linux you would want to 
have all your storage as a single software RAID, run LVM on top of that, and 
then use LVM partitions for all file systems.  This allows you to dynamically 
grow and shrink file systems within the same storage pool.

However if you want to add extra hard drives to add extra space then I think 
you currently can't do it.  Let me know if this is what you require and I'll 
investigate it further.

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