Thread: v6.2.1 CD boot error: Input/output error

The input/output error thingie with /sbin/init, seems to be a fairly common problem, not limited to knoppix only. The errors seem to be due to /sbin/init failed to open /dev/console for input/output, but nobody seems to have found out why it happens only to certain systems :-

http://www.linuxquestions.org/questi...-error-397113/

Perhaps you can try to debug it by checking the permission of /dev/console and also do some chmod, when you run it under debug mode.

Cheers.

Thanks 'kl522' for your suggestion, however, it seems that 'input/output' error could be due to many possible causes. To change the permissions on a clean downloaded distribution doesn't make sense.

In my case the problem was with my CD which explains why a file could not be read i.e. input error.

My solution was simple:

- used a new, clean, high-quality 700MB CDR
- burned at slowest speed 4x
- OPTIONAL: increased the cache and RAM buffer size

As per the forums, most errors are due to:
1. Incomplete/bad download
2. Bad burn

Harry, thanks for your experienced advice and patience with first-timers like me.

These are simple measures to ensure successful CD/DVDs:

1a) Use the torrents rather than the mirrors

Yes, this is the best option. Using a torrent does not eliminate errors though, as I discovered. Whether by user error or otherwise, my 'uTorrent' download was incomplete even when it said "finished". I had to re-check/re-start my download.

1b) Do the simple md5 test

Yes, this step should be mandatory after a finished download. Foolishly, I ignored this hash key verification and trusted my torrent application to verify the complete download.

For an explanation of the procedure, go to:
http://www.knoppix.net/wiki/Downloading_FAQ#Q:_What_are_these_strange_MD5_file s_that_accompany_the_ISO_CD_images.3F

It's a single command:

Code:

md5sum -c KNOPPIX_xxxxxxxx.iso.md5

Here is the erraneous output after my first attempt of the uTorrent download:

Code:

md5sum -c KNOPPIX_V6.2.1CD-2010-01-31-EN.iso
md5sum:   
@@@@@@@@@@@@@@@@@@@@@@@@@@ : No such file or directory
  
@@@@@@@@@@@@@@@@@@@@@@@@@@ : FAILED open or read
md5sum: int1e = %08x: No such file or directory
int1e = %08x: FAILED open or read
md5sum: WARNING: 2 of 2 listed files could not be read

Here is the successful output after I 're-checked' and 're-started' my uTorrent download:

Code:

md5sum -c KNOPPIX_V6.2.1CD-2010-01-31-EN.iso.md5
KNOPPIX_V6.2.1CD-2010-01-31-EN.iso: OK

Knoppix is working and an important lesson learned.