On 01/27/2013 02:18 PM, Sam Martin wrote:

> I'm about to reinstall linux using 64bit wheezy dist rather than the 32bit on 
> i inadvertently used.
> 
> I've got a copy of /etc but I'm concerned that in /etc/mdadm/mdadm.config 
> there is no reference to the array.
> 
> The only lines that are uncommented are 
> 
> CREATE owner=root group=disk mode=0660 auto=yes
> HOMEHOST = <system>
> MAILADDR root

Why keeping a mdadm raid which incompatible binarys? Backup you data,
install from scratch and restore your data, makes more sense to me.

> Presuably is automatically detecting /dev/md0 (the raid vol)?
> 
> Can anyone offer any opinion/advice on this?  i don't want to be in a 
> position where i cannot get it back up.

Make sure you have a working and up2date backup, a print out of your
/etc/fstab and the contents from "cat /prod/mdstat" can be helpful as
well if something goes wrong.

> The raid is a simple mirror at the moment, but I'm guessing I cannot use it 
> without mdadm if it did go wrong?

Of course, you can boot from both disks. Just change the device name in
your bootloader from /dev/mdX to i.e the first detected SCSI / SATA disk
/dev/sdaX. So if you screw up one of them, boot from the other device
and resync your data.

Best
Frank


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