Re: Dynamically increase/reduce hardware raid partition?
hi ya
On Wed, 14 Apr 2004, Michael Bellears wrote:
> I have just installed Debian 3 on a Smart Array 6400 (4 disks (146.8G
> each) Raid 5) - This gives me a data partition of 409G.
that's pretty bad ... i'd have expected somewhere around 3x 146gb
of usable space
when you formatted the disks... did you use -m 1 or some other
non-default "reserved space" on these giant disks
> If I add an additional 146.8G drive, and update the array(Raid BIOS),
if you changed the "partition" ( raid bios )... you lost all data
- partitions are not dynamically resizable to add new disks to the array
> the changes are not reflected when in Debian (i.e. It still only sees a
> 409G partition, not ~520G)
>
> Is there anyway around this? Or everytime we add an additional drive, we
> must create a new array, and add it to fstab?
you need to use a "resizable" filesystem type ( reiserfs or jfs or xfs )
- if forgot which fs are dynamically resizable to allow the
inclusion of the new disk into its existing partitions
( allows you to make 256MB / to be 512MB / or something like it )
growing an existing raid array on the fly is a "bad thing"
and i hope you have very good backups to restore the entire array
c ya
alvin
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