Red Hat Bugzilla – Bug 504892
Live CD will "end_request: I/O error, dev sr0", unable to boot
Last modified: 2010-06-28 08:50:15 EDT
Description of problem: When booting from CD, the usual countdown to boot will appear, as well as the initial Fedora boot menu. Selecting "Boot from CD" as well as "Verify, Boot from CD" will give a black screen for a few seconds, then the CD drive audibly slows down and it begins displaying:
"end_request: I/O error, dev sr0, sector 1414248"
" ....... logical block 353562"
This will repeat a few times, then it will repeat varying between logical block 353560-353562.
Version-Release number of selected component (if applicable):
Fedora 11 x86_64 Final. (June 9th, 2009)
Not sure if reproducible. This is a vanilla Live CD.
Steps to Reproduce:
1. Download Fedora 11 x86_64 Live CD image
2. Burn to CD
3. At startup, select Boot from CD
Error message as described that repeats itself over and over.
Fedora boots from CD.
I have downloaded the ISO both by Torrent and from the official homepage. Their MD5 sums are identical. I have burned this ISO a second time at 10x speed to a different CD, with the same result and exactly the same sector & logical blocks giving the error. This is a standard, no-name, functional CD drive.
Also seeing this with differing block/sector numbers.
My hardware configuration is a Dell Dimension 4600:
[rlm@localhost incoming]$ sudo cdrecord -devices
[sudo] password for rlm:
wodim: Overview of accessible drives (2 found) :
0 dev='/dev/scd0' rwrw-- : 'SAMSUNG' 'CD-ROM SC-148A'
1 dev='/dev/scd1' rwrw-- : '_NEC' 'DVD+RW ND-2100AD'
Booting off the Samsung unit (the DVD unit can't be booted from).
Try adding 'pci=nomsi' to the kernel boot options.
That sounds great. How would I do that? The boot options menu that comes up when I boot from the Fedora Live CD doesn't have seem to have an option that would allow me to change the boot options.
Thanks to the fine folks at LinuxQuestions, I got an answer to my question posed in comment 4.
Unfortunately, I still get the same errors at boot time even with the "pci=nomsi" boot option set.
I am experiencing the same problem. I'm running an Acer Aspire 1350. It's quite an old laptop.
By removing "quiet" from the boot options, I can see more of the log. It appears to fail shortly after loading the CD-Rom driver, with the following errors:
Uniform CD-Rom Drive Revision: 2.30
Sense Key Medium Error
Unhandled Sense Code
Unrecognised Read Error
I've tried "pci=nomsi" and I'm afraid it hasn't helped.
I'm investigating if the problem is to do with the cd drive's firmware. My cd drive is a qsi sbw242c.
OP here, my CD drive is an Aopen 956E\AKV. I could list the rest of the hardware but I assume this is the culprit?
Had the same problem with f11 live cd 64-bit. Just waiting for 25+ minutis dit it for me.
There were also some problems in speed with the actual installation.
But all seems up and running now.
I'm seeing this as well. I think something may be going wrong during the burning process... If I try to run dd if=/dev/cdrom of=livecd.iso on a live image I've burned, I get the same Buffer I/O errors, and the resulting livecd.iso is a few k smaller than the original iso I burned. I've tried burning the same image on different computers, and the resulting disk images produce the I/O errors at the same sectors.
(In reply to comment #0)
> 2. Burn to CD
What tool are you using to burn your CD?
Bug 571074 - brasero CD image burns produce kernel I/O errors with some optical drives
(In reply to comment #10)
> What tool are you using to burn your CD?
> Bug 571074 - brasero CD image burns produce kernel I/O errors with some optical
Fairly sure I was using CDBurnerXP at the time.
I also got I/O errors with a burned Crunchbang install CD using ImgBurn that were very much like this.
(In reply to comment #11)
> (In reply to comment #10)
> > What tool are you using to burn your CD?
> > Bug 571074 - brasero CD image burns produce kernel I/O errors with some optical
> > drives
> Fairly sure I was using CDBurnerXP at the time.
> I also got I/O errors with a burned Crunchbang install CD using ImgBurn that
> were very much like this.
Thanks. Those both appear to be Windows apps:
CDBurnerXP has an option to let you choose "Disc at Once". That might be worth trying.
Nero 8 (WinXP/Asus Z91E/Toshiba burner) burned a CD that did not produce linux kernel errors and that passed readom's tests (Bug 571074, Comment 3). Nero 8 came with my CD burner (LiteOn iHAS424 retail). Unfortunately, I don't have WinXP on the system with the LiteOn burner.
(In reply to comment #12)
> CDBurnerXP has an option to let you choose "Disc at Once". That might be worth
OK, try DAO16.
I installed CDBurnerXP (184.108.40.2063) on WinXP and did two test burns (Asus Z91E/Toshiba burner):
1. Burn method: Choose automatically
2. Burn method: Disc at Once P+Q (DAO16)
The auto method produces a CD that causes kernel errors (F12/LiteOn iHAS424), and "readom -c2scan" reports errors at the end of the image.
The DAO16 method produces a CD that causes no errors.
Tested with this ISO CD image (26-Feb-2010 00:23 235M):
NB: In these tests, I burn on the WinXP/Asus Z91E/Toshiba burner system and check for errors on the F12/LiteOn iHAS424 system.
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