Hi, Luca thanks for your answer . the disk seems to be regular one. So for the new added disk i have followed the http://jamesthornton.com/redhat/linux/7.3/Reference-Guide/s1-filesystem-ext3-create.html and rebooted the server (edited the fstab ). But the disk doesnt seem to be mounted . So what can be the problem? Regards 2009/9/10, Luca Berra <bluca@comedia.it>: > On Thu, Sep 10, 2009 at 09:19:29AM +0300, pent 5971 wrote: >>Hi, >>Im new to this LVM stuff and still couldnt read and understand enough. >>But i have a RHEL 5x box (which i didnt installed) and we have > > rhel uses lvm by default >>phsically added a new disk which i have to create a file system to be >>able to use it. df -h command gives normal /var /data / partions, but > first column of df output is the device, if it looks like /dev/sd?? or > /dev/hd?? it is a normal partition > if it looks like /dev/mapper/xxxxx-yyyy or /dev/xxxxx/yyyy it is > probably an lvm > also the commands vgs, lvs, and pvs help, i.e. > root@Moskowskaya # vgs > VG #PV #LV #SN Attr VSize VFree > vg00 1 7 0 wz--n 232.81G 10.81G > root@Moskowskaya # pvs > PV VG Fmt Attr PSize PFree > /dev/sda vg00 lvm2 a- 232.81G 10.81G > > >>id like ask how can i understand if the first disk/sytem is created >>with LVM , and if so (any other box can be so in the future) what is >>best way to add the disk and crete the file system? > woah, well, the simple answer is: there is no best way, you have to > evaluate the pros and cons yourself. > > you could add the new disk to the existing volume group, which would > give you the advantage of using avaliable space as a single pool and > being able to create/extend existing logical volumes/filesystems using > both disks. with the disadvantage of being more painful to recover in > case one of the disks fails. > you could create a new volume group using the new disk, or create a > partition if you are more confortable, or even use the whole device for > the new filesystem. > > L. > > -- > Luca Berra -- bluca@comedia.it > Communication Media & Services S.r.l. > /"\ > \ / ASCII RIBBON CAMPAIGN > X AGAINST HTML MAIL > / \ > > _______________________________________________ > linux-lvm mailing list > linux-lvm@redhat.com > https://www.redhat.com/mailman/listinfo/linux-lvm > read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ > _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
