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Old 04-03-2009, 11:39 PM   #1
SuperDude123
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what does a buffer I/O error on device sr0 mean?


I'm loading up a live copy of Mint Linux of a box through the CD, but I'm getting a

[ 124.705275] buffer I/O error on device sr0, logical block 174724
...and a bunch more

What does this mean? Bad hard ware? I ran a mem scan, and it was fine after running 19 full test.
 
Old 04-04-2009, 12:45 AM   #2
blackhole54
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I did a Google search on the phrase "buffer I/O error on device sr0" and the responses all seem to point to a problem with reading the CD/DVD. See, for example, this thread where x_terminat_or_3 says:


Quote:
Originally Posted by x_terminat_or_3 View Post
It means that there is an area that is unreadable on your cd/dvd.

Try burning the image again to a brand new cd/dvd
I would also suggest (if possible) verifying the md5s (sha1, signature, or whatever is available) of your downloaded iso image as well as verifying the md5s of the files on the CD itself (after burning a new one). For the second, many CD will have a boot option for that (it may say something like "verify integrity" instead of mentioning MD5). As far as my fist suggestion, I don't know if an error in the iso image can cause this error, but (IMHO) vefifying the downloaded image is always a good idea.
 
Old 04-04-2009, 05:24 AM   #3
GazL
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I had that issue when I tried to boot from an ubuntu disk I'd burnt with Windows/Nero. I assumed a bad burn and tried to burn it a couple of times more to new blanks with the same result. Burning the exact same image file to disk with cdrecord on linux ( I didn't redownload) I didn't have a problem.

Interestingly, I've never had any issues burning slackware disks, or any others for that matter with nero before, it seemed to be something specific to that ubuntu image that it didn't like. I've no idea why.
 
Old 04-04-2009, 05:50 AM   #4
linus72
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On my el' cheapo Ebay USB-CDROM I get the same error-then I ran a CD Cleaner through it and everything was fine-I have to clean it often too.
That's probably not your problem-just my experience with that error.
 
Old 04-04-2009, 11:11 AM   #5
SuperDude123
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Ok, I just tried a freshly downloaded Ubuntu ISO burned from my mac, and I still get these errors. Could this be the CD drive on the pc that is loading the CD? When I burned the ISO with Toast on my mac, and if I verify it, it will come out 100% ok! ?
 
Old 04-05-2009, 06:25 AM   #6
blackhole54
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Quote:
Originally Posted by SuperDude123 View Post
Could this be the CD drive on the pc that is loading the CD?
It could be. That's the problem -- trying to isolate the fault. If mint provicdes a "verfication" option (at boot), try that. If you have some other running system on that computer, you might be able to use that other system to verify the md5 sums of the the indivual files (to check whether the CD drive is reading the files accurately).
 
Old 04-05-2009, 07:09 AM   #7
jolphil
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Hello,
One more tip on burning often suggested is to burn your .iso disk slowly..
Fast burning can cause errors..
jolphil
 
Old 04-06-2009, 07:12 AM   #8
nigelc
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I have had it b4. It means bad dvd.. Burn it again at sloow speed.
 
Old 04-06-2009, 08:39 AM   #9
SuperDude123
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Ok, did it again but this time with an Ubuntu CD, and I still get the same prob. Would the next step be to run the verification step, and if it passes then, what do I do then?
 
Old 04-06-2009, 11:59 PM   #10
blackhole54
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Quote:
Originally Posted by SuperDude123 View Post
Ok, did it again but this time with an Ubuntu CD, and I still get the same prob.
I am beginning to think it is a hardware problem. And I may be getting above my pay grade. What do others here think?
 
Old 04-07-2009, 04:37 AM   #11
malekmustaq
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====="Ok, did it again but this time with an Ubuntu CD, and I still get the same prob. Would the next step be to run the verification step, and if it passes then, what do I do then?"====

SuperDude123:

If you run verification step and it gives a "passing grade" to your media by all means proceed to install using the same media. If the same issue reappears then this time "we are certain that the issue is no longer caused by the dvd" right? At least you have isolated the problem from that possibility.

blackhole54 may be right that the problem arose from the hardware.

By the way, under what hardware environment did you install Mint? Please post it here so that we can give you specific suggestions.

Usually Mint installs a kernel with SMP support, which often needs some switching when installing over an aged hardware. But we could not say any further here since we do not know what hardware you were using.

Goodluck, hope this helps.
 
  


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