Obtendo erro “leitura falhou após 0 de 4096 em xxxxxx: erro de entrada / saída” para LVM

Question

Eu tenho o sistema com o Ubuntu 12.04. Neste sistema usado LVM para o gerenciamento de unidades de disco e dispositivos similares de armazenamento em massa. Quando usei o comando lvscan para verificar todos os volumes lógicos, ele exibiu a seguinte saída

(12.10_20140228_00)ubuntu@pdc-00000:~$ sudo lvscan
[sudo] password for ubuntu: 
  /dev/ubuntu/rootfs_12.10_20140228_01: read failed after 0 of 4096 at 10737352704: Input/output error
  /dev/ubuntu/rootfs_12.10_20140228_01: read failed after 0 of 4096 at 10737410048: Input/output error
  /dev/ubuntu/rootfs_12.10_20140228_01: read failed after 0 of 4096 at 0: Input/output error
  /dev/ubuntu/rootfs_12.10_20140228_01: read failed after 0 of 4096 at 4096: Input/output error
  /dev/ubuntu/rootfs_12.10_20140409_00: read failed after 0 of 4096 at 10737352704: Input/output error
  /dev/ubuntu/rootfs_12.10_20140409_00: read failed after 0 of 4096 at 10737410048: Input/output error
  /dev/ubuntu/rootfs_12.10_20140409_00: read failed after 0 of 4096 at 0: Input/output error
  /dev/ubuntu/rootfs_12.10_20140409_00: read failed after 0 of 4096 at 4096: Input/output error
  ACTIVE            '/dev/ubuntu/videos' [30.00 GiB] inherit
  ACTIVE            '/dev/ubuntu/swap' [5.59 GiB] inherit
  ACTIVE   Original '/dev/ubuntu/rootfs_12.10_base' [10.00 GiB] inherit
  ACTIVE            '/dev/ubuntu/logging' [12.00 GiB] inherit
  ACTIVE            '/dev/ubuntu/bluetooth' [12.00 MiB] inherit
  ACTIVE            '/dev/ubuntu/machine_config' [12.00 MiB] inherit
  ACTIVE   Snapshot '/dev/ubuntu/rootfs_12.10_20140228_00' [6.00 GiB] inherit
  inactive Snapshot '/dev/ubuntu/rootfs_12.10_20140228_01' [6.00 GiB] inherit
  inactive Snapshot '/dev/ubuntu/rootfs_12.10_20140409_00' [6.00 GiB] inherit
  ACTIVE   Snapshot '/dev/ubuntu/rootfs_12.10_20140409_01' [6.00 GiB] inherit 

Também aqui está a saída de pvscan

(12.10_20140228_00)ubuntu@pdc-00000:~$ sudo pvscan
[sudo] password for ubuntu: 
  /dev/ubuntu/rootfs_12.10_20140228_01: read failed after 0 of 4096 at 10737352704: Input/output error
  /dev/ubuntu/rootfs_12.10_20140228_01: read failed after 0 of 4096 at 10737410048: Input/output error
  /dev/ubuntu/rootfs_12.10_20140228_01: read failed after 0 of 4096 at 0: Input/output error
  /dev/ubuntu/rootfs_12.10_20140228_01: read failed after 0 of 4096 at 4096: Input/output error
  /dev/ubuntu/rootfs_12.10_20140409_00: read failed after 0 of 4096 at 10737352704: Input/output error
  /dev/ubuntu/rootfs_12.10_20140409_00: read failed after 0 of 4096 at 10737410048: Input/output error
  /dev/ubuntu/rootfs_12.10_20140409_00: read failed after 0 of 4096 at 0: Input/output error
  /dev/ubuntu/rootfs_12.10_20140409_00: read failed after 0 of 4096 at 4096: Input/output error
  PV /dev/sda2   VG ubuntu   lvm2 [101.79 GiB / 20.18 GiB free]
  Total: 1 [101.79 GiB] / in use: 1 [101.79 GiB] / in no VG: 0 [0   ]

Qual é o significado de /dev/ubuntu/rootfs_12.10_20140228_01: read failed after 0 of 4096 at 10737352704: Input/output error .

Por favor, deixe-me saber por que esse erro está ocorrendo e isso afeta o sistema?

    

Answer 1

Basicamente, recebi este erro por causa dos dois instantâneos quebrados.

inactive Snapshot '/dev/ubuntu/rootfs_12.10_20140228_01' [6.00 GiB] inherit
inactive Snapshot '/dev/ubuntu/rootfs_12.10_20140409_00' [6.00 GiB] inherit

Para corrigir esse problema, removi os instantâneos quebrados usando o comando lvremove .

sudo lvremove /dev/ubuntu/rootfs_12.10_20140228_01

Para isso, eu me referi esta postagem .