I'm now able to make it work.. by issuing the command "/sbin/vgchange -a y" to activate all LVM. Then just mount it.
Thanks for all the help Mark David! On Fri, Jan 29, 2010 at 2:19 PM, Mike A. <[email protected]> wrote: > Yes, it appears that md0 is an LVM volume. running pvscan gives me this report > > PV /dev/hda2 VG VolGroup00 lvm2 [31.38 GB / 0 free] > PV /dev/md0 VG lvm_backup lvm2 [3.64 TB / 0 free] > Total: 2 [1.67 TB] / in use: 2 [1.67 TB] / in no VG: 0 [0 ] > > and running vgscan --mknodes gives me this > > Reading all physical volumes. This may take a while... > Found volume group "VolGroup00" using metadata type lvm2 > Found volume group "lvm_backup" using metadata type lvm2 > > The group name is "lvm_backup". Thanks! Now I just need to research > how will I be able to mount this LVM > > On Fri, Jan 29, 2010 at 12:38 PM, Mark David Dumlao <[email protected]> > wrote: >> Maybe you could try double checking if the md0 device is actually an >> LVM volume with pvscan / vgscan. The vgscan manual page reports you >> might need to run it explicitly after changing hardware, I've never >> had to, but try running `vgscan --mknodes`? >> >> On Fri, Jan 29, 2010 at 12:23 PM, Mike A. <[email protected]> wrote: >>> I believe it's not detected.. running lvscan gives me this: >>> >>> ACTIVE '/dev/VolGroup00/LogVol00' [27.44 GB] inherit >>> ACTIVE '/dev/VolGroup00/LogVol01' [3.94 GB] inherit >>> >>> On Fri, Jan 29, 2010 at 12:21 PM, Mark David Dumlao <[email protected]> >>> wrote: >>>> Try an `lvscan` to see if your logical volume is detected. Then mount >>>> the appropriate /dev/mapper/... device instead of the bare /dev/md0. >>>> >>>> On Fri, Jan 29, 2010 at 12:17 PM, Mike A. <[email protected]> wrote: >>>>> I believed it's in LVM >>>>> >>>>> >>>>> On Fri, Jan 29, 2010 at 12:15 PM, Mark David Dumlao <[email protected]> >>>>> wrote: >>>>>> You moved it from an old server to a new one. By any chance, did you >>>>>> use xfs, jfs, or some nonstandard filesystem on your old server? >>>>>> Perhaps you don't have the appropriate xfs/jfs tools installed on your >>>>>> new one just yet. Or perhaps you used LVM before? >>>>>> >>>>>> On Fri, Jan 29, 2010 at 11:59 AM, Mike A. <[email protected]> wrote: >>>>>>> Hi, >>>>>>> >>>>>>> I installed a new CentOS server and added 4 hard disk which is >>>>>>> configured as RAID0. These hard disk came from an old server and just >>>>>>> wanted to restore the data that's store in it. >>>>>>> >>>>>>> In DMESG, it says that the RAID was detected and it was configured. >>>>>>> (see below) >>>>>>> >>>>>>> md: Autodetecting RAID arrays. >>>>>>> md: autorun ... >>>>>>> md: considering sdd1 ... >>>>>>> md: adding sdd1 ... >>>>>>> md: adding sdc1 ... >>>>>>> md: adding sdb1 ... >>>>>>> md: adding sda1 ... >>>>>>> md: created md0 >>>>>>> md: bind<sda1> >>>>>>> md: bind<sdb1> >>>>>>> md: bind<sdc1> >>>>>>> md: bind<sdd1> >>>>>>> md: running: <sdd1><sdc1><sdb1><sda1> >>>>>>> md: raid0 personality registered for level 0 >>>>>>> md0: setting max_sectors to 512, segment boundary to 131071 >>>>>>> raid0: looking at sdd1 >>>>>>> raid0: comparing sdd1(976759808) with sdd1(976759808) >>>>>>> raid0: END >>>>>>> raid0: ==> UNIQUE >>>>>>> raid0: 1 zones >>>>>>> raid0: looking at sdc1 >>>>>>> raid0: comparing sdc1(976759808) with sdd1(976759808) >>>>>>> raid0: EQUAL >>>>>>> raid0: looking at sdb1 >>>>>>> raid0: comparing sdb1(976759808) with sdd1(976759808) >>>>>>> raid0: EQUAL >>>>>>> raid0: looking at sda1 >>>>>>> raid0: comparing sda1(976759808) with sdd1(976759808) >>>>>>> raid0: EQUAL >>>>>>> raid0: FINAL 1 zones >>>>>>> raid0: done. >>>>>>> raid0 : md_size is 3907039232 blocks. >>>>>>> raid0 : conf->hash_spacing is 3907039232 blocks. >>>>>>> raid0 : nb_zone is 1. >>>>>>> raid0 : Allocating 4 bytes for hash. >>>>>>> md: ... autorun DONE. >>>>>>> >>>>>>> However, whenever I mount /dev/md0 to a folder, it gives me this error: >>>>>>> >>>>>>> mount: wrong fs type, bad option, bad superblock on /dev/md0, >>>>>>> missing codepage or other error >>>>>>> In some cases useful info is found in syslog - try >>>>>>> dmesg | tail or so >>>>>>> >>>>>>> What do you think is the problem? How can I mount /dev/md0 so I can >>>>>>> restore it's data? >>>>>>> >>>>>>> Please help. >>>>>>> >>>>>>> Thanks! >>>>>>> _________________________________________________ >>>>>>> Philippine Linux Users' Group (PLUG) Mailing List >>>>>>> http://lists.linux.org.ph/mailman/listinfo/plug >>>>>>> Searchable Archives: http://archives.free.net.ph >>>>>>> >>>>>> >>>>>> >>>>>> >>>>>> -- >>>>>> This email is: [ ] actionable [ ] fyi [ ] social >>>>>> Response needed: [ ] yes [ ] up to you [ ] no >>>>>> Time-sensitive: [ ] immediate [ ] soon [ ] none >>>>>> _________________________________________________ >>>>>> Philippine Linux Users' Group (PLUG) Mailing List >>>>>> http://lists.linux.org.ph/mailman/listinfo/plug >>>>>> Searchable Archives: http://archives.free.net.ph >>>>>> >>>>> _________________________________________________ >>>>> Philippine Linux Users' Group (PLUG) Mailing List >>>>> http://lists.linux.org.ph/mailman/listinfo/plug >>>>> Searchable Archives: http://archives.free.net.ph >>>>> >>>> >>>> >>>> >>>> -- >>>> This email is: [ ] actionable [ ] fyi [ ] social >>>> Response needed: [ ] yes [ ] up to you [ ] no >>>> Time-sensitive: [ ] immediate [ ] soon [ ] none >>>> _________________________________________________ >>>> Philippine Linux Users' Group (PLUG) Mailing List >>>> http://lists.linux.org.ph/mailman/listinfo/plug >>>> Searchable Archives: http://archives.free.net.ph >>>> >>> _________________________________________________ >>> Philippine Linux Users' Group (PLUG) Mailing List >>> http://lists.linux.org.ph/mailman/listinfo/plug >>> Searchable Archives: http://archives.free.net.ph >>> >> >> >> >> -- >> This email is: [ ] actionable [ ] fyi [ ] social >> Response needed: [ ] yes [ ] up to you [ ] no >> Time-sensitive: [ ] immediate [ ] soon [ ] none >> _________________________________________________ >> Philippine Linux Users' Group (PLUG) Mailing List >> http://lists.linux.org.ph/mailman/listinfo/plug >> Searchable Archives: http://archives.free.net.ph >> > _________________________________________________ Philippine Linux Users' Group (PLUG) Mailing List http://lists.linux.org.ph/mailman/listinfo/plug Searchable Archives: http://archives.free.net.ph
