--- On Fri, 4/2/10, aurfalien at gmail.com <aurfalien at gmail.com> wrote: > From: aurfalien at gmail.com <aurfalien at gmail.com> > Subject: [CentOS] partition woes (mapper/isw_bdihgcgahe_Volume0p2) > To: "CentOS mailing list" <centos at centos.org> > Date: Friday, April 2, 2010, 8:03 PM > Hi, > > I found 2 identical drives lying around and put them into a > system. > > When booting from a Centos 5.x installer, and when being > presented > with the formatting option (disk druid), it says I have 1 > volume of; > > mamapper/isw_bdihgcgahe_Volume0p2 > > I can't seem to get rid of it. I have 2 physical > disks but disk druid > is seeing 1 volume thats the same size as one of the 2 > identical drives. > > I've tried everything from yanking the 2nd drive, > installing Centos > with 1 drive, then installing the second drive and doing; > > dd if=/dev/zero of=/dev/sdb > > ... to even installing diff OS's like Ubuntu and Windows > which see 2 > individual disks where I repartition/reformat the drives. > > Seems as though I can't truly re write a part of the master > boot > record or some other area. > > I'm pretty feeble with this crap so can any one help me get > a clue on > what to do? > > These drives may have been in some hard ware raided system > of the > past, am unsure and no one here knows. > 1) turn off raid in your bios 2) type the below command to erase meta data for the raid on the desired drive dmraid -E -r /dev/sdX if needed, turn the raid back on (so you can use it for single drives) -- Mark