dmesg grep for "error"
root@sf8008:~# dmesg | grep err
si2166 I2C(1) write error, ADDR: 202(0xca), DATA: 192(0xc0)
si2166 I2C(1) write error, ADDR: 202(0xca), DATA: 192(0xc0)
si2166 I2C(1) write error, ADDR: 202(0xca), DATA: 192(0xc0)
si2166 I2C(1) write error, ADDR: 202(0xca), DATA: 192(0xc0)
atbm781x2x3x I2C(2) read error, ADDR: 0(0x0000), DATA: 0(0x00)
atbm781x2x3x I2C(2) read error, ADDR: 0(0x0000), DATA: 0(0x00)
atbm781x2x3x I2C(1) read error, ADDR: 0(0x0000), DATA: 0(0x00)
atbm781x2x3x I2C(1) read error, ADDR: 0(0x0000), DATA: 0(0x00)
si2166 I2C(1) write error, ADDR: 202(0xca), DATA: 192(0xc0)
si2166 I2C(1) write error, ADDR: 202(0xca), DATA: 192(0xc0)
atbm781x2x3x I2C(2) read error, ADDR: 0(0x0000), DATA: 0(0x00)
atbm781x2x3x I2C(2) read error, ADDR: 0(0x0000), DATA: 0(0x00)
atbm781x2x3x I2C(1) read error, ADDR: 0(0x0000), DATA: 0(0x00)
atbm781x2x3x I2C(1) read error, ADDR: 0(0x0000), DATA: 0(0x00)
si2166 I2C(1) write error, ADDR: 202(0xca), DATA: 192(0xc0)
si2166 I2C(1) write error, ADDR: 202(0xca), DATA: 192(0xc0)
atbm781x2x3x I2C(2) read error, ADDR: 0(0x0000), DATA: 0(0x00)
atbm781x2x3x I2C(2) read error, ADDR: 0(0x0000), DATA: 0(0x00)
atbm781x2x3x I2C(1) read error, ADDR: 0(0x0000), DATA: 0(0x00)
atbm781x2x3x I2C(1) read error, ADDR: 0(0x0000), DATA: 0(0x00)
ahci: probe of f9900000.hiahci failed with error -1
blk_update_request: I/O error, dev sdb, sector 62914832
blk_update_request: I/O error, dev sdb, sector 62914840
EXT4-fs error (device sdb1): __ext4_get_inode_loc:4107: inode #19201: block 7864352: comm vsftpd: unable to read itable block
EXT4-fs error (device sdb1): __ext4_get_inode_loc:4107: inode #125: block 1064: comm vsftpd: unable to read itable block
EXT4-fs (sdb1): previous I/O error to superblock detected
EXT4-fs error (device sdb1): __ext4_get_inode_loc:4107: inode #126: block 1064: comm vsftpd: unable to read itable block
EXT4-fs (sdb1): previous I/O error to superblock detected
EXT4-fs error (device sdb1): __ext4_get_inode_loc:4107: inode #285441: block 116916256: comm vsftpd: unable to read itable block
EXT4-fs (sdb1): previous I/O error to superblock detected
EXT4-fs error (device sdb1): __ext4_get_inode_loc:4107: inode #58881: block 24117280: comm vsftpd: unable to read itable block
EXT4-fs (sdb1): previous I/O error to superblock detected
EXT4-fs error (device sdb1): __ext4_get_inode_loc:4107: inode #17921: block 7340064: comm vsftpd: unable to read itable block
EXT4-fs (sdb1): previous I/O error to superblock detected
EXT4-fs error (device sdb1): __ext4_get_inode_loc:4107: inode #102: block 1063: comm vsftpd: unable to read itable block
EXT4-fs (sdb1): previous I/O error to superblock detected
EXT4-fs error (device sdb1): __ext4_get_inode_loc:4107: inode #102401: block 41943072: comm vsftpd: unable to read itable block
EXT4-fs (sdb1): previous I/O error to superblock detected
EXT4-fs error (device sdb1): __ext4_get_inode_loc:4107: inode #122: block 1064: comm vsftpd: unable to read itable block
EXT4-fs (sdb1): previous I/O error to superblock detected
EXT4-fs error (device sdb1): __ext4_get_inode_loc:4107: inode #129: block 1065: comm vsftpd: unable to read itable block
EXT4-fs (sdb1): previous I/O error to superblock detected
EXT4-fs (sdb1): previous I/O error to superblock detected
EXT4-fs warning (device sdb1): dx_probe:739: inode #2: lblock 0: comm find: error -5 reading directory block
EXT4-fs warning (device sdb1): dx_probe:739: inode #2: lblock 0: comm rm: error -5 reading directory block
EXT4-fs warning (device sdb1): dx_probe:739: inode #2: lblock 0: comm enigma2: error -5 reading directory block
EXT4-fs warning (device sdb1): dx_probe:739: inode #2: lblock 0: comm enigma2: error -5 reading directory block
EXT4-fs warning (device sdb1): dx_probe:739: inode #2: lblock 0: comm enigma2: error -5 reading directory block
EXT4-fs warning (device sdb1): dx_probe:739: inode #2: lblock 0: comm enigma2: error -5 reading directory block
EXT4-fs warning (device sdb1): dx_probe:739: inode #2: lblock 0: comm find: error -5 reading directory block
EXT4-fs warning (device sdb1): dx_probe:739: inode #2: lblock 0: comm rm: error -5 reading directory block
EXT4-fs warning (device sdb1): dx_probe:739: inode #2: lblock 0: comm vsftpd: error -5 reading directory block
EXT4-fs warning (device sdb1): dx_probe:739: inode #2: lblock 0: comm vsftpd: error -5 reading directory block
EXT4-fs warning (device sdb1): dx_probe:739: inode #2: lblock 0: comm ls: error -5 reading directory block
EXT4-fs warning (device sdb1): dx_probe:739: inode #2: lblock 0: comm ls: error -5 reading directory block
EXT4-fs warning (device sdb1): dx_probe:739: inode #2: lblock 0: comm vsftpd: error -5 reading directory block
EXT4-fs warning (device sdb1): dx_probe:739: inode #2: lblock 0: comm ls: error -5 reading directory block
EXT4-fs warning (device sdb1): dx_probe:739: inode #2: lblock 0: comm opkg: error -5 reading directory block
EXT4-fs warning (device sdb1): dx_probe:739: inode #2: lblock 0: comm opkg: error -5 reading directory block
EXT4-fs warning (device sdb1): dx_probe:739: inode #2: lblock 0: comm opkg: error -5 reading directory block
EXT4-fs warning (device sdb1): dx_probe:739: inode #2: lblock 0: comm opkg: error -5 reading directory block
EXT4-fs warning (device sdb1): dx_probe:739: inode #2: lblock 0: comm opkg: error -5 reading directory block
EXT4-fs warning (device sdb1): dx_probe:739: inode #2: lblock 0: comm opkg: error -5 reading directory block
EXT4-fs warning (device sdb1): dx_probe:739: inode #2: lblock 0: comm opkg: error -5 reading directory block
EXT4-fs warning (device sdb1): dx_probe:739: inode #2: lblock 0: comm opkg: error -5 reading directory block
EXT4-fs warning (device sdb1): dx_probe:739: inode #2: lblock 0: comm sh: error -5 reading directory block
EXT4-fs warning (device sdb1): dx_probe:739: inode #2: lblock 0: comm sh: error -5 reading directory block
EXT4-fs warning (device sdb1): dx_probe:739: inode #2: lblock 0: comm micro: error -5 reading directory block
EXT4-fs warning (device sdb1): dx_probe:739: inode #2: lblock 0: comm vsftpd: error -5 reading directory block