Despues de agregar un disco virtual a Centos, lo agrego a un volumen y al reinciar se me olvida desmontarlo o mas bien reducir el volumen a su tamaño real.
Cuando enciendo el equipo se produce un kernel panic porque no es capaz de encontrar el volumen que habia generado.
Para solucionarlo reinicio con una live en mi caso una ubuntu que tenia.
Instalo el lvm2
aptitude install lvm2
Visualizo el estado de mis volumenes con pvscan
root@ubuntu:~# pvscan
/dev/mapper/VolGroup00-imagen-missing_0_0: read failed after 0 of 4096 at 33488896: Error de entrada/sali da
/dev/mapper/VolGroup00-imagen-missing_0_0: read failed after 0 of 4096 at 33546240: Error de entrada/sali da
/dev/mapper/VolGroup00-imagen-missing_0_0: read failed after 0 of 4096 at 0: Error de entrada/salida
/dev/mapper/VolGroup00-imagen-missing_0_0: read failed after 0 of 4096 at 4096: Error de entrada/salida
/dev/mapper/VolGroup00-imagen-missing_0_0: read failed after 0 of 4096 at 0: Error de entrada/salida
/dev/mapper/VolGroup00-imagen-cow: read failed after 0 of 4096 at 33488896: Error de entrada/salida
/dev/mapper/VolGroup00-imagen-cow: read failed after 0 of 4096 at 33546240: Error de entrada/salida
/dev/mapper/VolGroup00-imagen-cow: read failed after 0 of 4096 at 0: Error de entrada/salida
/dev/mapper/VolGroup00-imagen-cow: read failed after 0 of 4096 at 4096: Error de entrada/salida
/dev/mapper/VolGroup00-imagen-cow: read failed after 0 of 4096 at 0: Error de entrada/salida
/dev/mapper/VolGroup00-imagen-missing_0_0: read failed after 0 of 4096 at 0: Error de entrada/salida
/dev/mapper/VolGroup00-imagen-cow: read failed after 0 of 4096 at 0: Error de entrada/salida
Couldn’t find device with uuid ‘BiIn1S-JRq2-VEon-iczM-QXNS-kLkJ-ZKNku3’.
PV /dev/sdb1 VG DATOS lvm2 [232,88 GiB / 0 free]
PV /dev/sda2 VG VolGroup00 lvm2 [232,78 GiB / 0 free]
PV unknown device VG VolGroup00 lvm2 [32,00 MiB / 0 free]
PV /dev/ram1 lvm2 [64,00 MiB]
Total: 4 [465,76 GiB] / in use: 3 [465,70 GiB] / in no VG: 1 [64,00 MiB]
Como podemos apreciar en negrita aparece un unknow device asociado a mi grupo VolGroup00 que es el que nos esta dando el kernel panic.
Solucion: # vgreduce –removemissing –force VolGroup00
root@ubuntu:~# vgreduce –removemissing –force VolGroup00
/dev/mapper/VolGroup00-imagen-missing_0_0: read failed after 0 of 4096 at 0: Error de entrada/salida
/dev/mapper/VolGroup00-imagen-cow: read failed after 0 of 4096 at 0: Error de entrada/salida
/dev/mapper/VolGroup00-imagen-missing_0_0: read failed after 0 of 4096 at 33488896: Error de entrada/salida
/dev/mapper/VolGroup00-imagen-missing_0_0: read failed after 0 of 4096 at 33546240: Error de entrada/salida
/dev/mapper/VolGroup00-imagen-missing_0_0: read failed after 0 of 4096 at 0: Error de entrada/salida
/dev/mapper/VolGroup00-imagen-missing_0_0: read failed after 0 of 4096 at 4096: Error de entrada/salida
/dev/mapper/VolGroup00-imagen-missing_0_0: read failed after 0 of 4096 at 0: Error de entrada/salida
/dev/mapper/VolGroup00-imagen-cow: read failed after 0 of 4096 at 33488896: Error de entrada/salida
/dev/mapper/VolGroup00-imagen-cow: read failed after 0 of 4096 at 33546240: Error de entrada/salida
/dev/mapper/VolGroup00-imagen-cow: read failed after 0 of 4096 at 0: Error de entrada/salida
/dev/mapper/VolGroup00-imagen-cow: read failed after 0 of 4096 at 4096: Error de entrada/salida
/dev/mapper/VolGroup00-imagen-cow: read failed after 0 of 4096 at 0: Error de entrada/salida
Couldn’t find device with uuid ‘BiIn1S-JRq2-VEon-iczM-QXNS-kLkJ-ZKNku3’.
/dev/mapper/VolGroup00-imagen-missing_0_0: read failed after 0 of 4096 at 0: Error de entrada/salida
/dev/mapper/VolGroup00-imagen-cow: read failed after 0 of 4096 at 0: Error de entrada/salida
Couldn’t find device with uuid ‘BiIn1S-JRq2-VEon-iczM-QXNS-kLkJ-ZKNku3’.
/dev/mapper/VolGroup00-imagen-missing_0_0: read failed after 0 of 4096 at 0: Error de entrada/salida
/dev/mapper/VolGroup00-imagen-cow: read failed after 0 of 4096 at 0: Error de entrada/salida
Couldn’t find device with uuid ‘BiIn1S-JRq2-VEon-iczM-QXNS-kLkJ-ZKNku3’.
/dev/mapper/VolGroup00-LogVol00-real: stat failed: No existe el archivo o directorio
Path /dev/mapper/VolGroup00-LogVol00-real no longer valid for device(252,2)
/dev/disk/by-id/dm-name-VolGroup00-LogVol00-real: stat failed: No existe el archivo o directorio
Path /dev/disk/by-id/dm-name-VolGroup00-LogVol00-real no longer valid for device(252,2)
/dev/block/252:2: stat failed: No existe el archivo o directorio
Path /dev/block/252:2 no longer valid for device(252,2)
/dev/disk/by-id/dm-uuid-LVM-GQz8s9t2aje4z2Sg6oKgf9gR7TsjU5U5YQO0B5RtWhgjIdQz35QEE3QSVlqk6Ham-real: stat failed: No existe el archivo o directorio
Path /dev/disk/by-id/dm-uuid-LVM-GQz8s9t2aje4z2Sg6oKgf9gR7TsjU5U5YQO0B5RtWhgjIdQz35QEE3QSVlqk6Ham-real no longer valid for device(252,2)
/dev/mapper/VolGroup00-imagen-missing_0_0: stat failed: No existe el archivo o directorio
Path /dev/mapper/VolGroup00-imagen-missing_0_0 no longer valid for device(252,4)
/dev/disk/by-id/dm-name-VolGroup00-imagen-missing_0_0: stat failed: No existe el archivo o directorio
Path /dev/disk/by-id/dm-name-VolGroup00-imagen-missing_0_0 no longer valid for device(252,4)
/dev/block/252:4: stat failed: No existe el archivo o directorio
Path /dev/block/252:4 no longer valid for device(252,4)
/dev/disk/by-id/dm-uuid-LVM-GQz8s9t2aje4z2Sg6oKgf9gR7TsjU5U5uO9lcr4ke28C0rp2C4ibkRJ2rG3MJw6O-missing_0_0: stat failed: No existe el archivo o directorio
Path /dev/disk/by-id/dm-uuid-LVM-GQz8s9t2aje4z2Sg6oKgf9gR7TsjU5U5uO9lcr4ke28C0rp2C4ibkRJ2rG3MJw6O-missing_0_0 no longer valid for device(252,4)
/dev/mapper/VolGroup00-imagen-cow: stat failed: No existe el archivo o directorio
Path /dev/mapper/VolGroup00-imagen-cow no longer valid for device(252,5)
/dev/disk/by-id/dm-uuid-LVM-GQz8s9t2aje4z2Sg6oKgf9gR7TsjU5U5uO9lcr4ke28C0rp2C4ibkRJ2rG3MJw6O-cow: stat failed: No existe el archivo o directorio
Path /dev/disk/by-id/dm-uuid-LVM-GQz8s9t2aje4z2Sg6oKgf9gR7TsjU5U5uO9lcr4ke28C0rp2C4ibkRJ2rG3MJw6O-cow no longer valid for device(252,5)
/dev/block/252:5: stat failed: No existe el archivo o directorio
Path /dev/block/252:5 no longer valid for device(252,5)
/dev/disk/by-id/dm-name-VolGroup00-imagen-cow: stat failed: No existe el archivo o directorio
Path /dev/disk/by-id/dm-name-VolGroup00-imagen-cow no longer valid for device(252,5)
Couldn’t find device with uuid ‘BiIn1S-JRq2-VEon-iczM-QXNS-kLkJ-ZKNku3’.
/dev/disk/by-id/dm-uuid-LVM-GQz8s9t2aje4z2Sg6oKgf9gR7TsjU5U5YQO0B5RtWhgjIdQz35QEE3QSVlqk6Ham-real: stat failed: No existe el archivo o directorio
Path /dev/disk/by-id/dm-uuid-LVM-GQz8s9t2aje4z2Sg6oKgf9gR7TsjU5U5YQO0B5RtWhgjIdQz35QEE3QSVlqk6Ham-real no longer valid for device(252,2)
/dev/disk/by-id/dm-uuid-LVM-GQz8s9t2aje4z2Sg6oKgf9gR7TsjU5U5uO9lcr4ke28C0rp2C4ibkRJ2rG3MJw6O-missing_0_0: stat failed: No existe el archivo o directorio
Path /dev/disk/by-id/dm-uuid-LVM-GQz8s9t2aje4z2Sg6oKgf9gR7TsjU5U5uO9lcr4ke28C0rp2C4ibkRJ2rG3MJw6O-missing_0_0 no longer valid for device(252,4)
/dev/disk/by-id/dm-name-VolGroup00-imagen-cow: stat failed: No existe el archivo o directorio
Path /dev/disk/by-id/dm-name-VolGroup00-imagen-cow no longer valid for device(252,5)
Couldn’t find device with uuid ‘BiIn1S-JRq2-VEon-iczM-QXNS-kLkJ-ZKNku3’.
/dev/disk/by-id/dm-uuid-LVM-GQz8s9t2aje4z2Sg6oKgf9gR7TsjU5U5YQO0B5RtWhgjIdQz35QEE3QSVlqk6Ham-real: stat failed: No existe el archivo o directorio
Path /dev/disk/by-id/dm-uuid-LVM-GQz8s9t2aje4z2Sg6oKgf9gR7TsjU5U5YQO0B5RtWhgjIdQz35QEE3QSVlqk6Ham-real no longer valid for device(252,2)
/dev/disk/by-id/dm-uuid-LVM-GQz8s9t2aje4z2Sg6oKgf9gR7TsjU5U5uO9lcr4ke28C0rp2C4ibkRJ2rG3MJw6O-missing_0_0: stat failed: No existe el archivo o directorio
Path /dev/disk/by-id/dm-uuid-LVM-GQz8s9t2aje4z2Sg6oKgf9gR7TsjU5U5uO9lcr4ke28C0rp2C4ibkRJ2rG3MJw6O-missing_0_0 no longer valid for device(252,4)
/dev/disk/by-id/dm-name-VolGroup00-imagen-cow: stat failed: No existe el archivo o directorio
Path /dev/disk/by-id/dm-name-VolGroup00-imagen-cow no longer valid for device(252,5)
Couldn’t find device with uuid ‘BiIn1S-JRq2-VEon-iczM-QXNS-kLkJ-ZKNku3’.
LogVol00 is expected to have only one segment using it, while it has 0
Failed to find mirror_seg for LogVol00
Wrote out consistent volume group VolGroup00
Cuando termina lanzo un pvscan y ya no aparece el volumen desconocido.
root@ubuntu:~# pvscan
PV /dev/sdb1 VG DATOS lvm2 [232,88 GiB / 0 free]
PV /dev/sda2 VG VolGroup00 lvm2 [232,78 GiB / 230,84 GiB free]
PV /dev/ram1 lvm2 [64,00 MiB]
Total: 3 [465,73 GiB] / in use: 2 [465,66 GiB] / in no VG: 1 [64,00 MiB]
