[   27.517773] init: plymouth-upstart-bridge main process ended, respawning
[   27.524994] init: plymouth-upstart-bridge main process (2388) terminated with status 1
[   27.525016] init: plymouth-upstart-bridge main process ended, respawning
[  260.842112] EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
[  260.842922] EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
[  260.843711] EXT4-fs (sdb1): VFS: Can't find ext4 filesystem
[  260.845027] FAT-fs (sdb1): bogus number of reserved sectors
[  260.845033] FAT-fs (sdb1): Can't find a valid FAT filesystem
[  260.846234] SQUASHFS error: Can't find a SQUASHFS superblock on sdb1
[  321.371229] EXT4-fs (sdb1): VFS: Can't find ext4 filesystem