Dotaz: Prenosný disk s LVM sa nedá pripojiť

[Vlado99]

Ahoj.

Riešim taký problém, ako zásobovať údajmi stroj, ktorý je bez internetu. Na prvom stroji, pripojenom na internet, dáta pripravím, na prenosnom disku ich prenesiem a na druhom použijem. Oba stroje sú RHEL 8.9 a ladím to pod VMWare, čiže "prenosný disk" je reálne vmdk súbor, ktorý od prvej VM odpojím a ku druhej pripojím.

Keď urobím mount, hlási to "mount: /media/Import: can't read superblock on /dev/mapper/vgData2-lvExport.". vgs aj lvs vidia aj VG, aj LV. vgscan situáciu nezlepší. lsblk ukáže partície na prenosnom disku, ale bez väzby na LVM. Navyše disk je teraz pripojený ako /dev/sdd, hoci pôvodne bol /dev/sdc.

Keď stroj reštartujem, tak "sa to samo opraví": prenosný disk je vidieť ako /dev/sdc, lsblk ho vylistuje aj s príslušnými LV, mount funguje.

Ešte dodám, že vo fstab mám ten mount definovaný ako "/dev/mapper/vgData2-lvExport /mountpoint ...".

Otázka znie: Ako sa dá urobiť oprava bez reštartu stroja?

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Odpovědi

[alkoholik]

Co zkusit nejdriv pvscan s autoaktivaci?

[Vlado99]

Dobrý nápad, ale nepomôže:

sudo pvscan --cache -aay -vv /dev/sdd{1,2}
  global/use_lvmpolld not found in config: defaulting to 1
  devices/sysfs_scan not found in config: defaulting to 1
  devices/scan_lvs not found in config: defaulting to 0
  devices/multipath_component_detection not found in config: defaulting to 1
  devices/md_component_detection not found in config: defaulting to 1
  devices/fw_raid_component_detection not found in config: defaulting to 0
  devices/ignore_suspended_devices not found in config: defaulting to 0
  devices/ignore_lvm_mirrors not found in config: defaulting to 1
  devices/scan_lvs not found in config: defaulting to 0
  devices/allow_mixed_block_sizes not found in config: defaulting to 0
  devices/hints not found in config: defaulting to "all"
  activation/activation_mode not found in config: defaulting to "degraded"
  metadata/record_lvs_history not found in config: defaulting to 0
  devices/search_for_devnames not found in config: defaulting to "auto"
  activation/monitoring not found in config: defaulting to 1
  global/locking_type not found in config: defaulting to 1
  global/wait_for_locks not found in config: defaulting to 1
  global/prioritise_write_locks not found in config: defaulting to 1
  global/locking_dir not found in config: defaulting to "/run/lock/lvm"
  devices/md_component_detection not found in config: defaulting to 1
  devices/md_component_checks not found in config: defaulting to "auto"
  devices/multipath_wwids_file not found in config: defaulting to "/etc/multipath/wwids"
  global/use_lvmlockd not found in config: defaulting to 0
  global/event_activation not found in config: defaulting to 1
  devices/use_devicesfile not found in config: defaulting to 0
  /dev/sdd1: size is 209713152 sectors
  /dev/sdd2: size is 209715200 sectors
  /dev/sdd1: using cached size 209713152 sectors
  /dev/sdd1: using cached size 209713152 sectors
  /dev/sdd2: using cached size 209715200 sectors
  /dev/sdd2: using cached size 209715200 sectors
  pvscan[17707] PV /dev/sdd1 online, VG vgData2 is complete.
  pvscan[17707] PV /dev/sdd2 online, VG vgData2 is complete.
  report/output_format not found in config: defaulting to "basic"
  log/report_command_log not found in config: defaulting to 0
  pvscan[17707] VG vgData2 skip autoactivation.
  global/notify_dbus not found in config: defaulting to 1

sudo vgchange -aay -v vgData2
  1 logical volume(s) in volume group "vgData2" already active
  1 existing logical volume(s) in volume group "vgData2" monitored
  activation/auto_activation_volume_list configuration setting not defined: All logical volumes will be auto-activated.
  Activating logical volume vgData2/lvExport.
  activation/volume_list configuration setting not defined: Checking only host tags for vgData2/lvExport.
  Activated 1 logical volumes in volume group vgData2.
  1 logical volume(s) in volume group "vgData2" now active

lsblk -o NAME,KNAME | grep -e sdc -e sdd
sdd                         sdd
├─sdd1                      sdd1
└─sdd2                      sdd2

Mount naďalej hlási "can't read superblock".

LVM je samé pre seba spokojné - VG vidí, LV vidí, tvári sa, že je všetko OK. Ale prepojenie na zvyšok systému - tam je niekde zrada.

Keby som vedel povedať systému, že ten disk má byť sdc a nie sdd, verím tomu, že by problém zmizol.

[alkoholik]

Takze neco jako tohle?

[Vlado99]

sudo lvmdevices
  Devices file not enabled.

sudo find /etc/lvm/
/etc/lvm/
/etc/lvm/archive
/etc/lvm/archive/vgSystem_00000-914420647.vg
/etc/lvm/archive/vgData1_00000-1866963447.vg
/etc/lvm/archive/vgData2_00000-1211857201.vg
/etc/lvm/backup
/etc/lvm/backup/vgSystem
/etc/lvm/backup/vgData1
/etc/lvm/backup/vgData2
/etc/lvm/cache
/etc/lvm/lvm.conf
/etc/lvm/lvmlocal.conf
/etc/lvm/profile
/etc/lvm/profile/cache-mq.profile
/etc/lvm/profile/cache-smq.profile
/etc/lvm/profile/command_profile_template.profile
/etc/lvm/profile/lvmdbusd.profile
/etc/lvm/profile/metadata_profile_template.profile
/etc/lvm/profile/thin-generic.profile
/etc/lvm/profile/thin-performance.profile
/etc/lvm/profile/vdo-small.profile

sudo grep -r sdc /etc/lvm/
/etc/lvm/archive/vgData2_00000-1211857201.vg:                   device = "/dev/sdc1"    # Hint only
/etc/lvm/archive/vgData2_00000-1211857201.vg:                   device = "/dev/sdc2"    # Hint only
/etc/lvm/backup/vgData2:                        device = "/dev/sdc1"    # Hint only
/etc/lvm/backup/vgData2:                        device = "/dev/sdc2"    # Hint only

[Vlado99]

Heureka!

sudo vgchange -a n vgData2
sudo vgchange -a y vgData2
sudo mount /media/Export

Našiel som na Linuxquestions.

Díky.

[k3dAR]

Predpokladam ze kdyz odpojujes, tak das jen umount ale lvm nedeaktivujes prave tim "sudo vgchange -a n vgData2", takze kdyz to pak vratis zpatky tak to LVM tam vysi, drzelo si sdc a proto se disk nove prida jako sdd...