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Bug 78125 - k3b write iso to disk verify fails
Summary: k3b write iso to disk verify fails
Status: RESOLVED UPSTREAM
Alias: None
Product: Gentoo Linux
Classification: Unclassified
Component: New packages (show other bugs)
Hardware: x86 Linux
: High minor
Assignee: Gentoo KDE team
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2005-01-15 12:19 UTC by M. Edward Borasky
Modified: 2005-01-15 14:24 UTC (History)
0 users

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Package list:
Runtime testing required: ---


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Description M. Edward Borasky 2005-01-15 12:19:42 UTC
environment: app-cdr/k3b-0.11.18-r1, 2.6.10-gentoo-r4, ordinary non-root user, cdrdao and cdrecord **not** suid root.

I wrote an iso image to a CD-RW successfully with K3B, but it reproducibly failed to verify. This is the "burn ISO image to CD" menu item. I tried this on two different systems. The image in question, if it matters, is the first test of the 2005.0 minimal install CD, about 50 megabytes.

I ended up reading the just-burned CD image back to the hard drive in a different place with k3b and manually checking the MD5 sums, which matched. So my guess is that the verify step's readback or MD5 sum is broken. I haven't tried this as "root", and I haven't tried it with "xcdroast", which also has a verify feature. I *always* verify CDs I've burned; life is too short not to. :)

Can someone try this in another environment? I'm sure it's something simple, and there is a (slightly cumbersome) workaround.
Comment 1 Carsten Lohrke (RETIRED) gentoo-dev 2005-01-15 13:47:35 UTC
sounds more like a bug for bugs.kde.org
Comment 3 M. Edward Borasky 2005-01-15 14:24:39 UTC
Yup ... looks like the first one (92240). The details suggest that even though the MD5 sums check, the resulting CD is failed. I'm going to try switching from TAO to DAO on the write and see if that helps. Gotta have good CDs :)

Incidentally, I burned a number of CDs around the time of the 2004.3 release that I had trouble reading back on another machine, even though they did verify in K3B. This was back in the days when I was on 2.4.25, so it isn't a 2.6 kernel issue. I figured it was flaky media or a flaky drive on the readback system, but maybe they were written in TAO mode.