Single HDD into soft-RAID?

Smith, Albert Albert.Smith at genexservices.com
Fri Mar 4 17:10:11 UTC 2005


 

> -----Original Message-----
> From: redhat-list-bounces at redhat.com 
> [mailto:redhat-list-bounces at redhat.com] On Behalf Of Richard Hobbs
> Sent: Friday, March 04, 2005 11:58 AM
> To: 'General Red Hat Linux discussion list'
> Subject: RE: Single HDD into soft-RAID?
> 
> 
> > -----Original Message-----
> > From: redhat-list-bounces at redhat.com
> > [mailto:redhat-list-bounces at redhat.com] On Behalf Of Smith, Albert
> > Sent: 04 March 2005 14:37
> > To: General Red Hat Linux discussion list
> > Subject: RE: Single HDD into soft-RAID?
> > 
> >  
> > 
> > > -----Original Message-----
> > > From: redhat-list-bounces at redhat.com 
> > > [mailto:redhat-list-bounces at redhat.com] On Behalf Of Richard Hobbs
> > > Sent: Friday, March 04, 2005 5:44 AM
> > > To: 'General Red Hat Linux discussion list'
> > > Subject: Single HDD into soft-RAID?
> > > 
> > > Hello,
> > > 
> > > I currently have a machine which has a single hard drive, non 
> > > RAID'd, running RH8.0.
> > > 
> > > I would like to add a second hard drive and turn it into a
> > soft-RAID1
> > > (mirrored) machine.
> > > 
> > > Is this possible, or will I have to rebuild the machine, 
> > > partitioning the disk as RAID partitions this time, instead of 
> > > normal partitions?
> > > 
> > > If this is possible without repartitioning the hard drive and 
> > > reinstalling redhat, could you let me know how?
> > > 
> > > Thanks in advance,
> > > Hobbs.
> > > 
> > > --
> > > Richard Hobbs (Systems Administrator) Toshiba Research 
> Europe Ltd. - 
> > > Speech Technology Group
> > > Web: http://www.toshiba-europe.com/research/
> > > Email: richard.hobbs at crl.toshiba.co.uk
> > > Tel: +44 1223 376964        Mobile: +44 7811 803377
> > > 
> > > 
> > > 
> > > 
> > 
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> > > 
> > If you have enough room on your current drives for this, 
> create raid 
> > partition's the same size as your current partition's on 
> your source 
> > and on your target disk, create the raid set, and migrate your data 
> > then update your necessary config files. If you do not have enough 
> > storage on your current drive's. Then you will have the reinstall.
> 
> So, are you basically saying that if I physically install hdb 
> and hdc, then I can create the raid partitions on these 
> drives, and copy the data from my existing hard drive, I can 
> then boot to the new drives instead of the old one?
> 
> What about the MBR? I'll have to write that again, but I'm 
> not quite sure how easy that'll be...
> 
> Thanks for your help, it's greatly appreciated :-)
> 
> Thanks,
> Hobbs.
> 
> --
> Richard Hobbs (Systems Administrator)
> Toshiba Research Europe Ltd. - Speech Technology Group
> Web: http://www.toshiba-europe.com/research/
> Email: richard.hobbs at crl.toshiba.co.uk
> Tel: +44 1223 376964        Mobile: +44 7811 803377
> 
> 
> 
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> 
The MBR and GRUB would all need to be updated to reflect the changes if
you are moving from one drive to another.

It might be safer to reinstall if you want the root drives to be
mirrored.



Albert Smith
Sr. Unix Systems Administrator
HPCSA, RHCT
Genex Services
440 E. Swedesford Rd.
Wayne, PA 19087
albert.smith at genexservices.com
(610) 964-5154





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