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Old 11-23-2010, 01:58 PM   #1
taylorkh
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How to check integrity of install CD?


Ubuntu 10.04 32 bit. I am familiar with the option on the alternate CDs to check CD integrity. Is there such a thing for the normal desktop live/install CD? I know the download image is OK. I have created several virtual machines from it. I believe the CD is OK - I have installed 2 physical machines from it.

I am now installing on my old Dell Poweredge 400 SC. When I first boot from the CD I get the message "The installer encountered an unrecoverable error..." then it brings up the Live CD OS. From there I can manually run install. The first time it got about half way through copying files to the hard drive and died. It indicated an I/O error. Could be dirt in the DVD drive - it is older than dirt. Or it could be the CD. Dirt I can clean with some compressed air. How do I verify the CD?

I am downloading the alternate CD now as I try a second run at installing.

TIA,

Ken
 
Old 11-23-2010, 02:29 PM   #2
stress_junkie
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Often the software that writes the image onto the CD will have an option to verify the image on the disk against the ISO file. That's the first opportunity to verify the CD image.

Post number #3 in this thread talks in detail about manually verifying the CD image against the ISO.
http://www.linuxquestions.org/questi...0/#post4109383
 
Old 11-23-2010, 02:47 PM   #3
honeybadger
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This happend to me once - I cleaned the dvd with perfume on a cotton swab. Worked for me. You may try it.... your milage may vary.
 
Old 11-23-2010, 03:35 PM   #4
taylorkh
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Thanks stress_junkie - I burn with k3b or Nero Linux. I always verify the burn regardless of the source. However the receiving drive will sometimes dislike the CD or DVD even if it verified in the burning drive. The verification routing on the alternate CD was nice as it worked in the target drive. Not yet having the OS installed on the target machine makes running an external verification program a little tedious but thanks or the tip.

Thanks SilverBack - Don;t have any perfume - will sand paper do?

In actual fact - I COPIED the offending CD to another CD in the DVD drive on my desktop PC - where the original CD was created from the ISO file. Booted the server from the copy CD. This time I again got the ""The installer encountered..." error - even though I never got the chance to Try Ubuntu or Install Ubuntu. I let it go to the Live CD Desktop, ran Install Ubuntu, filled in all the custom partition information (lets not go there I have a reason to my madness), user name etc. for the 4th time and took the dog for a walk. When I got back the install was complete. Perhaps I should have gone for a walk the first time - a watched kettle and all.

I am now wondering about upgrading the BIOS. It is at A03 and the current is A10. I took the floppy drive out to cram in another hard drive. I have downloaded the BIOS update from Dell, uncompressed it using a VMWare XP VM, copied it onto a bootable SD card (which contains the diagnostics for my Dell Latitude netbook). I think I can put the SD card in a USB reader and boot the server from that to do the update. What can that hurt? I am only using the server as a 5 TB NAS. I could simply plug in the drives to my USB connected docking station as I need some backup data. Just like a bunch of 1 TB diskettes!

Ken
 
  


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