[CentOS] Isolinux disk error 20; AX=4280, drive EF

Sun Aug 3 00:53:37 UTC 2008
Dag Wieers <dag at centos.org>

On Sat, 2 Aug 2008, Ed Westphal wrote:

> Lanny Marcus wrote:
>>  On Sat, Aug 2, 2008 at 1:37 PM, Ed Westphal <enwestph at rochester.rr.com
>>  <mailto:enwestph at rochester.rr.com>> wrote:
>> >  I thought I'd be clever and buy a DVD for 5.2 from LinuxOnline.biz.
>> >  Well, just got around to trying it with the above results. Does the
>> >  error mean I have a 'bad' DVD disk image? Please advise. Thanks.
>>  Boot from the DVD and at the boot prompt, type "linux mediacheck" (without
>>  the quote marks).
>>  That will check the DVD, to see if it checks out OK. That said, a few days
>>  ago, I installed from a
>>  DVD that did not pass "linux mediacheck" and that box is running OK. YMMV. 
> Thanks Larry. Not even getting to a boot prompt. First time, it was saying: 
> 'Press any key to try again'. - gives same results.
> I've been Googling the above. It seems that there are some incompatibilities 
> that others have reported with Isolinux? I'm wondering if others here have 
> seen the problem here? I know about the checksum error thing. I've done other 
> installs from CD's without a problem. Thought a DVD would be a better install 
> medium. Perhaps with my Intel D875PBZ motherboard, there is a conflict 
> loading ISO images? Don't know. Haven't found any workarounds if that is 
> indeed the case. I have the latest Intel bios. Is there one install medium 
> provider that most prefer? To be sure to get good disks. I'd prefer getting a 
> disk(s) from someone rather than trying to burn my own. Thoughts, advice 
> appreciated. Thanks.

I suspect it is not a medium problem but rather an incompatibility (or 
bug) with isolinux and your DVD drive. So most likely the same would 
happen with any other provided media (or own-written media).

I would suggest comparing the MD5 or SHA1 from the DVD with the online 
provided checksum to make sure the image is intact. But the chances are 
really slim that the isolinux bootloader got corrupted, so I doubt it will 
make a difference...

--   dag wieers,  dag at centos.org,  http://dag.wieers.com/   --
[Any errors in spelling, tact or fact are transmission errors]