On 5/8/2011 8:05 AM, Charlie Brune wrote: > On 05/08/2011 09:37 AM, Todd Cary wrote: >> On 5/8/2011 12:03 AM, Ken Smith wrote: >>> Todd Cary wrote: >>>> I have connected a HD that was a prior system drive (Centos 4.8) >>>> and I am not sure of the command line procedures to find out if >>>> it is recognized (I believe it is since it present in the GUI), >>>> delete all data on it and finally add it to the LVM. >>>> >>>> I would like to use it as a backup data drive. >>>> >>>> Todd >>>> >>>> >>> This is an excellent tutorial on LVM. >>> >>> http://tldp.org/HOWTO/LVM-HOWTO/ >>> >>> Are you planning to join it to an existing Volume Group and then create >>> a LV on it for backup? My preference would be to keep things simple and >>> to aid recovery in the future, maybe just format the disk ext3 for >>> backup. Then it is easy to plug into another box for recovery. But, I'm >>> just guessing how you plan to use it. >>> >>> Ken >>> >> Ken - >> >> Thank you for your response. What you suggested is exactly what >> I would like to do: have an extra, stand alone, drive for >> backup. However, when I do >> >> fdisk -l >> >> I get the output below which has me concerned. As a "Sunday >> afternoon" user of Centos, I am not 100% sure of my >> interpretation - that is - the drive is already been joined as >> part of the LVM even though all I did was to plug it in as a slave. >> >> My installation of Centos 5.5 is new and I do not remember >> specifying LVM (though that is what I had with my 4.8 system). >> The /dev/hdc (250 GB) is the new system drive. The /dev/hdd is >> the old Centos 4.8 drive that I would like to have as an >> independent drive e.g. /dev/hda or whatever it needs to be. >> >> What I DO NOT want to happen is for me to accidentally mess up my >> new Centos 5.5 system :-)!! >> >> Questions: >> >> * Is it possible to "remove" /dev/hdd from the LVM - at least it >> appears to be part of it >> * Once removed, format it as EXT3 and mount it as /dev/hda (or >> /dev/hdd) >> >> For this I am swimming in unknown waters. >> >> Todd >> >> Disk /dev/hdc: 251.0 GB, 251000193024 bytes >> 255 heads, 63 sectors/track, 30515 cylinders >> Units = cylinders of 16065 * 512 = 8225280 bytes >> >> Device Boot Start End Blocks Id System >> /dev/hdc1 * 1 13 104391 83 Linux >> /dev/hdc2 14 30515 245007315 8e Linux LVM >> >> Disk /dev/hdd: 163.9 GB, 163928604672 bytes >> 255 heads, 63 sectors/track, 19929 cylinders >> Units = cylinders of 16065 * 512 = 8225280 bytes >> >> Device Boot Start End Blocks Id System >> /dev/hdd1 * 1 13 104391 83 Linux >> /dev/hdd2 14 19929 159975270 8e Linux LVM >> >> Disk /dev/sda: 81.9 GB, 81964302336 bytes >> 255 heads, 63 sectors/track, 9964 cylinders >> Units = cylinders of 16065 * 512 = 8225280 bytes >> >> Device Boot Start End Blocks Id System >> /dev/sda1 1 9964 80035798+ 7 HPFS/NTFS >> >> > For working with LVM's, I've found that the "system-config-lvm" GUI tool > is excellent. It's really great for when I want to reduce a logical > volume, since it handles resizing both the file system and the volume > group for you). > > It will display all of your drives/partitions and let you adjust them > for what you describe. > > Please take a look at it and feel free to post any questions. > > Charlie > > P.S. I'm a Unix Admin, so I love the command line ... this is one of the > few times where I recommend a GUI tool over typing the commands. > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > > I am off for a ten day trip, but when I return I'll take a look at it. Todd -- Ariste Software Petaluma, CA 94952 http://www.aristesoftware.com