Re: [linux-lvm] [Fwd: Mistake(s) on install of EXP300...]

["Heinz J . Mauelshagen" <mauelshagen@sistina.com>]

Scott,

saving your /etc/lvmtab* you can reactivate your VG in case something else
might go wrong by restoring it and "vgchange -ay".


Writing a partition table to /dev/sdb overwrote the PV part of LVMs metadata
on that disk.

Give vgcfgrestore a try on /dev/sdb.

Please don't forget to bakup /etc/lvmconf/ regularly.

Regards,
Heinz    -- The LVM Guy --

On Mon, Dec 10, 2001 at 03:53:01PM -0600, Scott P wrote:
> Hi...
> 
> I did not recieve a response, just wanted to know if somoeone could verify
> that I can use vgcfgrestore and recover my VGDA?
> 
> Please help, if possible. I am working on a Production machine. Therefore,
> I cannot test. I have little margin for errors.
> 
> LVM Ver & driver/patch:
> 0.9.1_beta7
> /boot/vmlinuz-2.2.19-lvm0.9
> lvm-0.9.1_beta7-2.2.19.patch
> 
> 
> Thanks!
> 
> -Scott
> 
> 
> Scott P wrote:
> 
> > Hi list,
> >
> > This is what I've done so far ( I apologize for the large amount of
> > lines/info!):
> >
> > [root@ptb3 /root]# pvcreate -v /dev/sdb
> > pvcreate -- locking logical volume manager
> > pvcreate -- checking physical volume name "/dev/sdb"
> > pvcreate -- getting physical volume size
> > pvcreate -- checking partition type
> > pvcreate -- creating new physical volume
> > pvcreate -- setting up physical volume for /dev/sdb with 860231680
> > sectors
> > pvcreate -- writing physical volume data to disk "/dev/sdb"
> > pvcreate -- physical volume "/dev/sdb" successfully created
> > pvcreate -- unlocking logical volume manager
> >
> > [root@ptb3 /root]# pvscan
> > pvscan -- reading all physical volumes (this may take a while...)
> > pvscan -- inactive PV "/dev/sdb"  is in no VG  [410.19 GB]
> > pvscan -- ACTIVE   PV "/dev/sdc1" of VG "exp300_2" [440.69 GB / 0 free]
> > pvscan -- ACTIVE   PV "/dev/sdd1" of VG "exp300_2" [440.69 GB / 0 free]
> > pvscan -- total: 3 [1.26 TB] / in use: 2 [881.43 GB] / in no VG: 1
> > [410.19 GB]
> >
> > [root@ptb3 /root]# dmesg | less
> > [root@ptb3 /root]# vgscan
> > vgscan -- reading all physical volumes (this may take a while...)
> > vgscan -- found active volume group "exp300_2"
> > vgscan -- "/etc/lvmtab" and "/etc/lvmtab.d" successfully created
> > vgscan -- WARNING: This program does not do a VGDA backup of your volume
> > group
> >
> > [root@ptb3 /root]# lvscan
> > lvscan -- ACTIVE            "/dev/exp300_2/exp300_lv2" [881.38 GB]
> > lvscan -- 1 logical volumes with 881.38 GB total in 1 volume group
> > lvscan -- 1 active logical volumes
> >
> > [root@ptb3 /root]# vgextend -A y exp300_2 /dev/sdb
> > vgextend -- INFO: maximum logical volume size is 1 Terabyte
> > vgextend -- doing automatic backup of volume group "exp300_2"
> > vgextend -- volume group "exp300_2" successfully extended
> >
> > [root@ptb3 /root]# lvextend -L +440.7 /dev/exp300_2/exp300_lv2 /dev/sdb
> > lvextend -- rounding size to physical extent boundary
> > lvextend -- extending logical volume "/dev/exp300_2/exp300_lv2" to
> > 881.81 GB
> > lvextend -- doing automatic backup of volume group "exp300_2"
> > lvextend -- logical volume "/dev/exp300_2/exp300_lv2" successfully
> > extended
> >
> > Then,  not thinking at all,  I went back and ran fdisk, since I forgot
> > to run fdisk, it was 2:00 a.m. in the morning!!!
> >
> > root@ptb3 rc3.d]# fdisk /dev/sdb
> >
> > The number of cylinders for this disk is set to 53757.
> > There is nothing wrong with that, but this is larger than 1024,
> > and could in certain setups cause problems with:
> > 1) software that runs at boot time (e.g., LILO)
> > 2) booting and partitioning software from other OSs
> >    (e.g., DOS FDISK, OS/2 FDISK)
> >
> > Command (m for help): p
> >
> > Disk /dev/sdb: 254 heads, 63 sectors, 53757 cylinders
> > Units = cylinders of 16002 * 512 bytes
> >
> >    Device Boot    Start       End    Blocks   Id  System
> >
> > Command (m for help): m
> > Command action
> >    a   toggle a bootable flag
> >    b   edit bsd disklabel
> >    c   toggle the dos compatibility flag
> >    d   delete a partition
> >    l   list known partition types
> >    m   print this menu
> >    n   add a new partition
> >    o   create a new empty DOS partition table
> >    p   print the partition table
> >    q   quit without saving changes
> >    s   create a new empty Sun disklabel
> >    t   change a partition's system id
> >    u   change display/entry units
> >    v   verify the partition table
> >    w   write table to disk and exit
> >    x   extra functionality (experts only)
> >
> > Command (m for help): n
> > Command action
> >    e   extended
> >    p   primary partition (1-4)
> > p
> > Partition number (1-4): 1
> > First cylinder (1-53757, default 1):
> > Using default value 1
> > Last cylinder or +size or +sizeM or +sizeK (1-53757, default 53757):
> > Using default value 53757
> >
> > Command (m for help): p
> >
> > Disk /dev/sdb: 254 heads, 63 sectors, 53757 cylinders
> > Units = cylinders of 16002 * 512 bytes
> >
> >    Device Boot    Start       End    Blocks   Id  System
> > /dev/sdb1             1     53757 430109725+  83  Linux
> >
> > Command (m for help): l
> >
> >  0  Empty           17  Hidden HPFS/NTF 5c  Priam Edisk     a6  OpenBSD
> >  1  FAT12           18  AST Windows swa 61  SpeedStor       a7  NeXTSTEP
> >
> >  2  XENIX root      1b  Hidden Win95 FA 63  GNU HURD or Sys b7  BSDI fs
> >  3  XENIX usr       1c  Hidden Win95 FA 64  Novell Netware  b8  BSDI
> > swap
> >  4  FAT16 <32M      1e  Hidden Win95 FA 65  Novell Netware  c1
> > DRDOS/sec (FAT-
> >  5  Extended        24  NEC DOS         70  DiskSecure Mult c4
> > DRDOS/sec (FAT-
> >  6  FAT16           3c  PartitionMagic  75  PC/IX           c6
> > DRDOS/sec (FAT-
> >  7  HPFS/NTFS       40  Venix 80286     80  Old Minix       c7  Syrinx
> >  8  AIX             41  PPC PReP Boot   81  Minix / old Lin db  CP/M /
> > CTOS / .
> >  9  AIX bootable    42  SFS             82  Linux swap      e1  DOS
> > access
> >  a  OS/2 Boot Manag 4d  QNX4.x          83  Linux           e3  DOS R/O
> >  b  Win95 FAT32     4e  QNX4.x 2nd part 84  OS/2 hidden C:  e4
> > SpeedStor
> >  c  Win95 FAT32 (LB 4f  QNX4.x 3rd part 85  Linux extended  eb  BeOS fs
> >  e  Win95 FAT16 (LB 50  OnTrack DM      86  NTFS volume set f1
> > SpeedStor
> >  f  Win95 Ext'd (LB 51  OnTrack DM6 Aux 87  NTFS volume set f4
> > SpeedStor
> > 10  OPUS            52  CP/M            93  Amoeba          f2  DOS
> > secondary
> > 11  Hidden FAT12    53  OnTrack DM6 Aux 94  Amoeba BBT      fd  Linux
> > raid auto
> > 12  Compaq diagnost 54  OnTrackDM6      a0  IBM Thinkpad hi fe  LANstep
> > 14  Hidden FAT16 <3 55  EZ-Drive        a5  BSD/386         ff  BBT
> > 16  Hidden FAT16    56  Golden Bow
> >
> > Command (m for help): m
> > Command action
> >    a   toggle a bootable flag
> >    b   edit bsd disklabel
> >    c   toggle the dos compatibility flag
> >    d   delete a partition
> >    l   list known partition types
> >    m   print this menu
> >    n   add a new partition
> >    o   create a new empty DOS partition table
> >    p   print the partition table
> >    q   quit without saving changes
> >    s   create a new empty Sun disklabel
> >    t   change a partition's system id
> >    u   change display/entry units
> >    v   verify the partition table
> >    w   write table to disk and exit
> >    x   extra functionality (experts only)
> >
> > Command (m for help): t
> > Partition number (1-4): 1
> > Hex code (type L to list codes): l
> >
> >  0  Empty           17  Hidden HPFS/NTF 5c  Priam Edisk     a6  OpenBSD
> >  1  FAT12           18  AST Windows swa 61  SpeedStor       a7  NeXTSTEP
> >
> >  2  XENIX root      1b  Hidden Win95 FA 63  GNU HURD or Sys b7  BSDI fs
> >  3  XENIX usr       1c  Hidden Win95 FA 64  Novell Netware  b8  BSDI
> > swap
> >  4  FAT16 <32M      1e  Hidden Win95 FA 65  Novell Netware  c1
> > DRDOS/sec (FAT-
> >  5  Extended        24  NEC DOS         70  DiskSecure Mult c4
> > DRDOS/sec (FAT-
> >  6  FAT16           3c  PartitionMagic  75  PC/IX           c6
> > DRDOS/sec (FAT-
> >  7  HPFS/NTFS       40  Venix 80286     80  Old Minix       c7  Syrinx
> >  8  AIX             41  PPC PReP Boot   81  Minix / old Lin db  CP/M /
> > CTOS / .
> >  9  AIX bootable    42  SFS             82  Linux swap      e1  DOS
> > access
> >  a  OS/2 Boot Manag 4d  QNX4.x          83  Linux           e3  DOS R/O
> >  b  Win95 FAT32     4e  QNX4.x 2nd part 84  OS/2 hidden C:  e4
> > SpeedStor
> >  c  Win95 FAT32 (LB 4f  QNX4.x 3rd part 85  Linux extended  eb  BeOS fs
> >  e  Win95 FAT16 (LB 50  OnTrack DM      86  NTFS volume set f1
> > SpeedStor
> >  f  Win95 Ext'd (LB 51  OnTrack DM6 Aux 87  NTFS volume set f4
> > SpeedStor
> > 10  OPUS            52  CP/M            93  Amoeba          f2  DOS
> > secondary
> > 11  Hidden FAT12    53  OnTrack DM6 Aux 94  Amoeba BBT      fd  Linux
> > raid auto
> > 12  Compaq diagnost 54  OnTrackDM6      a0  IBM Thinkpad hi fe  LANstep
> > 14  Hidden FAT16 <3 55  EZ-Drive        a5  BSD/386         ff  BBT
> > 16  Hidden FAT16    56  Golden Bow
> > Hex code (type L to list codes): 8e
> > Changed system type of partition 1 to 8e (Unknown)
> >
> > Command (m for help): p
> >
> > Disk /dev/sdb: 254 heads, 63 sectors, 53757 cylinders
> > Units = cylinders of 16002 * 512 bytes
> >
> >    Device Boot    Start       End    Blocks   Id  System
> > /dev/sdb1             1     53757 430109725+  8e  Unknown
> >
> > Command (m for help): m
> > Command action
> >    a   toggle a bootable flag
> >    b   edit bsd disklabel
> >    c   toggle the dos compatibility flag
> >    d   delete a partition
> >    l   list known partition types
> >    m   print this menu
> >    n   add a new partition
> >    o   create a new empty DOS partition table
> >    p   print the partition table
> >    q   quit without saving changes
> >    s   create a new empty Sun disklabel
> >    t   change a partition's system id
> >    u   change display/entry units
> >    v   verify the partition table
> >    w   write table to disk and exit
> >    x   extra functionality (experts only)
> >
> > Command (m for help): v
> > 62 unallocated sectors
> >
> > Command (m for help): w
> > The partition table has been altered!
> >
> > Calling ioctl() to re-read partition table.
> >
> > WARNING: If you have created or modified any DOS 6.x
> > partitions, please see the fdisk manual page for additional
> > information.
> > Syncing disks.
> >
> > So,  now I have these errors when running most of the LVM cmds!!
> >
> > [root@ptb3 rc3.d]# vgscan
> > vgscan -- reading all physical volumes (this may take a while...)
> > vgscan -- found active volume group "exp300_2"
> > vgscan -- ERROR "pv_read_pe(): PV size invalid" can't get data of volume
> > group "exp300_2" from physical volume(s)
> > vgscan -- ERROR "pv_read_pe(): PV size invalid" creating "/etc/lvmtab"
> > and "/etc/lvmtab.d"
> >
> > [root@ptb3 rc3.d]# vgdisplay
> > vgdisplay -- ERROR: VGDA in kernel and lvmtab are NOT consistent; please
> > run vgscan
> >
> > [root@ptb3 rc3.d]# pvscan
> > pvscan -- reading all physical volumes (this may take a while...)
> > pvscan -- ACTIVE   PV "/dev/sdb"   is associated to an unknown VG (run
> > vgscan)
> > pvscan -- ACTIVE   PV "/dev/sdc1"  is associated to an unknown VG (run
> > vgscan)
> > pvscan -- ACTIVE   PV "/dev/sdd1"  is associated to an unknown VG (run
> > vgscan)
> > pvscan -- total: 3 [889.43 GB] / in use: 3 [889.43 GB] / in no VG: 0 [0]
> >
> > [root@ptb3 rc3.d]# lvscan
> > lvscan -- ERROR: VGDA in kernel and lvmtab are NOT consistent; please
> > run vgscan
> >
> > Hence, chaos ensues on this machine....
> >
> > Please let me know if "vgcfgrestore" will work for me.
> > Or do I try to remove the partition from fdisk? I really don't think
> > that will help though!
> > I think the damage is done from the partition write to the EXP300 disk
> > array.
> >
> > Also,  if I reboot, will there be a disaster?(For fdisk...)
> > This is a production machine.
> >
> > Please help me if you can...
> >
> > TIA!
> >
> > -Scott
> 
> 
> _______________________________________________
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> read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html

*** Software bugs are stupid.
    Nevertheless it needs not so stupid people to solve them ***

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Heinz Mauelshagen                                 Sistina Software Inc.
Senior Consultant/Developer                       Am Sonnenhang 11
                                                  56242 Marienrachdorf
                                                  Germany
Mauelshagen@Sistina.com                           +49 2626 141200
                                                       FAX 924446
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