[mythtv-users] How to migrate a disk in SW RAID? WAS:Re: RAID 5 of different sized disks for mythtv storage?

Steven Adeff adeffs.mythtv at gmail.com
Tue Sep 12 17:42:56 UTC 2006

On 9/12/06, list at onnow.net <list at onnow.net> wrote:
> Quoting Steven Adeff <adeffs.mythtv at gmail.com>:
> > On 9/11/06, list at onnow.net <list at onnow.net> wrote:
> >> I have a 4 disk RAID in hda(b)(c)(d)
> >> I am adding a prommise IDE controler.
> >> I want to migrate the raid setup to be hda hdc hdf hdh
> >>
> >> Any one know how to do that?  The data on the drive will still be
> >> there, I just have to tell it to look somehwere else.
> >>
> >> Also, can anyone confirm that a single promise PCI ATA add in card has
> >> two seperate BUS's?  I am trying to break my RAID to one drive per BUS.
> >
> > If you set your partitions to be "fd" (linux raid auto-detect) then
> > you should be fine, the drives contain "signatures" of sorts that let
> > the kernel RAID driver know what partitions belong together. I've
> > moved Software RAID arrays between machines and the autodetect always
> > properly put the array together.
> >
> > As for the Promise PATA card... Each channel on the old ATA is what
> > one could consider a seperate bus. (ie they can be used
> > simultanesouly, unlike two drives on the same channel)
> The drives have no partitions on them.  They are wholely used in the RAID5.
> eg.
> Command (m for help): p
> Disk /dev/hdd: 320.0 GB, 320072933376 bytes
> 255 heads, 63 sectors/track, 38913 cylinders
> Units = cylinders of 16065 * 512 = 8225280 bytes
>     Device Boot      Start         End      Blocks   Id  System
> Command (m for help): q
> Is that odd?

I didn't think you could create an array without partitions.
So I'll say its odd. But others may know better than I.

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