On 07/05/14 09:13, Mahmood Naderan wrote: > No it is not shared via NFS (do we have to first share it?) > Problem is, there is no free slot for disks in our machine (say N1). > However another node (say N2 which is running scientific linux > independently) has free slots. So I added the physical disks to N2. the > disk has been formatted and it has a mount point on N2. > > Now I want to add N2:/dev/sdb to N1:/dev/tigerfiler1/tigervolume > Can you please guide step by step?
<DISCLAIMER> Not testet, but this is the theory behind it. I take not responsibility in potential data loss. </DISCLAIMER> I have no idea how N2:/dev/sdb differs from N1:/dev/sdb. You need access to a device file with your new harddrive. I'm using /dev/sde here in the example, to cover the LVM basics: # Make the new drive a LVM physical volume pvcreate /dev/sde # Extend the tigerfiler1 volume group with the new drive vgextend tigerfiler1 /dev/sde Now you can use fsadm resize -l /dev/tigerfiler1/tigervolume $NEWSIZE That's the LVM theory. What is confusing here is: "So I added the physical disks to N2. the disk has been formatted and it has a mount point on N2." ... You cannot use mountpoints for LVM physical volumes. If you need to do this over a network, you need to configure iSCSI, which will give you another /dev/sdX device when properly setup. This /dev/sdX device can then be used as an LVM physical volume. If considering iSCSI (you need tgtd on the iSCSI "server" (target) and iscsi-utils on the "client" (initiator)), I would strongly recommend using a separate network interface for the iSCSI traffic - preferably back-to-back, to not get too bad network performance. -- kind regards, David Sommerseth > ------------------------------------------------------------------------ > > *From: *"Mahmood Naderan" <[email protected]> > *To: *[email protected] > *Sent: *Wednesday, May 7, 2014 1:12:41 AM > *Subject: *Add a remote disk to LVM > > > > Hello, > Is it possible to add a network drive to existing LVM? I have > created a group and have added three local drives. Now I want to add > a remote disk from another node. The remote node has an additional > hard drive and is mounted to /arch (remote node) > > Is that possible? How? All examples I see are trying to add extra > local drives and not remote drives. > > Here are some info > > # vgdisplay > --- Volume group --- > VG Name tigerfiler1 > System ID > Format lvm2 > Metadata Areas 3 > Metadata Sequence No 2 > VG Access read/write > VG Status resizable > MAX LV 0 > Cur LV 1 > Open LV 1 > Max PV 0 > Cur PV 3 > Act PV 3 > VG Size 2.73 TiB > PE Size 4.00 MiB > Total PE 715401 > Alloc PE / Size 715401 / 2.73 TiB > Free PE / Size 0 / 0 > VG UUID 8Ef8Vj-bDc7-H4ia-D3X4-cDpY-kE9Z-njc8lj > > > > pvdisplay > --- Physical volume --- > PV Name /dev/sdb > VG Name tigerfiler1 > PV Size 931.51 GiB / not usable 1.71 MiB > Allocatable yes (but full) > PE Size 4.00 MiB > Total PE 238467 > Free PE 0 > Allocated PE 238467 > PV UUID FmC77z-9UaR-FhYa-ONHZ-EazF-5Hm2-8zmUuj > > --- Physical volume --- > PV Name /dev/sdc > VG Name tigerfiler1 > PV Size 931.51 GiB / not usable 1.71 MiB > Allocatable yes (but full) > PE Size 4.00 MiB > Total PE 238467 > Free PE 0 > Allocated PE 238467 > PV UUID 1jBQUn-gkkD-37I3-R3nL-KeHA-Hn2A-4zgNcR > > --- Physical volume --- > PV Name /dev/sdd > VG Name tigerfiler1 > PV Size 931.51 GiB / not usable 1.71 MiB > Allocatable yes (but full) > PE Size 4.00 MiB > Total PE 238467 > Free PE 0 > Allocated PE 238467 > PV UUID mxi8jW-O868-iPse-IfY7-ag3m-R3vZ-gS3Jdx > > > > > Regards, > Mahmood > > > >
