RE: Vijay - RAID restore question

["Vijay Ramnarayan" <vijay ramnarayan intransa com>]

Hi,

When I reinstalled the system the IDE disks were not connected.
The later on , I connected both the IDE disks and as per your email I
ran the following command  " mdadm -Ac partitions -m 0 /dev/md0 "
The message given was two disks added as RAID devices. 
Then I mounted them as "mount /dev/md0 /DATA/ " 
In /DATA I could not see any data. 

Thanks,
Vijay Kumar. 


-----Original Message-----
From: nahant-list-bounces redhat com
[mailto:nahant-list-bounces redhat com] On Behalf Of Jussi Silvennoinen
Sent: Thursday, April 20, 2006 7:50 PM
To: nahant-list redhat com
Subject: RE: Vijay - RAID restore question 

> Hi,
> 
> Did this , but no data could be seen after mounting /dev/md0 
> 
> > You mean I should create a new md0 device ? 
> > Will it not format the disks ? 
> > 
> > > I had a Redhat box on which I had configured  Software Mirroring
> > > between two disks using mdadm. 
> > >   
> > > Had to reinstall the OS which I did and now I have both the disks
on
> > > the same system.  
> > > 
> > > How do I configure mdam so that the DATA from at least one disk is
> not
> > > deleted ? 
> > > If a create a new md0 device will it nor format both the disks ? 
> > > 
> > > I cannot mount them as ext3 file system currently ?

Well then the disks might have been zapped at some point.

What exactly did you do?
You had two disks in the original system and software-raid1 between
them.
Then you reinstalled the system and the installer probably noticed the 
underlying raid1 and reused it overwriting any data on them.

Or?