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@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