[Ubuntu Wiki] Update of "DebuggingUbiquity" by jibel

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The "DebuggingUbiquity" page has been changed by jibel:
http://wiki.ubuntu.com/DebuggingUbiquity?action=diff&rev1=47&rev2=48

  
  Certain hardware failures can often be reported as installer bugs. This includes faulty CDs, CD drives hard drives and memory.
  
+ You can check if your hardware is faulty from kernel's error message in /var/log/syslog or the output of the command '''dmesg'''
+ 
+ You'll find messages such as:
+ {{{
+ Feb 18 22:01:41 ubuntu kernel: [ 1976.481211] ata3.00: exception Emask 0x0 SAct 0x1 SErr 0x0 action 0x0
+ Feb 18 22:01:41 ubuntu kernel: [ 1976.481230] ata3.00: irq_stat 0x40000008
+ Feb 18 22:01:41 ubuntu kernel: [ 1976.481257] ata3.00: failed command: READ FPDMA QUEUED
+ Feb 18 22:01:41 ubuntu kernel: [ 1976.481281] ata3.00: cmd 60/08:00:58:5c:0c/00:00:00:00:00/40 tag 0 ncq 4096 in
+ Feb 18 22:01:41 ubuntu kernel: [ 1976.481286]          res 51/40:08:58:5c:0c/00:00:00:00:00/40 Emask 0x409 (media error) <F>
+ Feb 18 22:01:41 ubuntu kernel: [ 1976.481296] ata3.00: status: { DRDY ERR }
+ Feb 18 22:01:41 ubuntu kernel: [ 1976.481304] ata3.00: error: { UNC }
+ Feb 18 22:01:41 ubuntu kernel: [ 1976.484953] ata3.00: configured for UDMA/133
+ Feb 18 22:01:41 ubuntu kernel: [ 1976.485000] sd 3:0:0:0: [sda] Unhandled sense code
+ Feb 18 22:01:41 ubuntu kernel: [ 1976.485012] sd 3:0:0:0: [sda]  Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
+ Feb 18 22:01:41 ubuntu kernel: [ 1976.485029] sd 3:0:0:0: [sda]  Sense Key : Medium Error [current] [descriptor]
+ Feb 18 22:01:41 ubuntu kernel: [ 1976.485048] Descriptor sense data with sense descriptors (in hex):
+ Feb 18 22:01:41 ubuntu kernel: [ 1976.485058]         72 03 11 04 00 00 00 0c 00 0a 80 00 00 00 00 00 
+ Feb 18 22:01:41 ubuntu kernel: [ 1976.485106]         00 0c 5c 58 
+ Feb 18 22:01:41 ubuntu kernel: [ 1976.485121] sd 3:0:0:0: [sda]  Add. Sense: Unrecovered read error - auto reallocate failed
+ Feb 18 22:01:41 ubuntu kernel: [ 1976.485137] sd 3:0:0:0: [sda] CDB: Read(10): 28 00 00 0c 5c 58 00 00 08 00
+ Feb 18 22:01:41 ubuntu kernel: [ 1976.485165] end_request: I/O error, dev sda, sector 810072
+ Feb 18 22:01:41 ubuntu kernel: [ 1976.485225] ata3: EH complete
+ }}}
+ 
  = Notes =
  
  The 'kernel command line' line of the syslog file contains information about the boot parameters used.