On Saturday 04 May 2002 19:38, Ron Stodden wrote: > The txtutils RPM contains the md5sum utility. I use md5sum /dev/scd0 > to check newly written CD-RW blanks against the md5sum of the iso file > from which they were written. Two problems: > > 1. At the first attempt, the 8.2 md5sum _always_ produces an > 'Input/output error' at the end of reading the CD, which takes a > L_O_N_G time. If the md5sum is immediately repeated (without > reloading the medium) then the correct 32 character checksum is > eventually produced. > > 2. This problem has got worse over successive Mandrake releases. 7.2 > used to work reliably, 8.0 sometimes will get it on the first pass, > 8.2 and the current cooker never. > > A correctly working md5sun is _essential_ to the production of CD-RW > disks.
[12:30 peter@penguin:~]$ time md5sum /dev/scd0 d55c962583b709132c0cb5888cefdda5 /dev/scd0 4.07user 2.08system 4:03.94elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (125major+22minor)pagefaults 0swaps md5sum is OK. Booted with devfs=nomount. -- Peter Ruskin, Wrexham, Wales. AMD Athlon XP 1600+, 512MB RAM. Registered Linux User 219434. Mandrake Linux release 8.2 (Bluebird) Kernel 2.4.18-6mdk-win4lin, XFree86 4.2.0, patch level 9mdk. KDE: 2.2.2. Qt: 2.3.1. Up 4 days 19 hours 14 minutes.
