240 vs 255 heads - varying HDD recognition by different BIOS

[lophiomys]

240 vs 255 heads - varying HDD recognition by different BIOSes

I recently ran into the problem that an externally partitioned
HDD was not recognized by my R51 -
the error msg was along the lines "invalid geometry of HDD"
or "bad partition table" (cant remember exactly)
and I had to repartition it from within my R51.

By chance I found an explanation of the problem, see the link below:

A good explanation of the problem:
http://radified.com/cgi-bin/YaBB/YaBB.c ... tart=14#14

Relating posts in this forum:

HDD swapped from 390x wont work in T20
http://forum.thinkpads.com/viewtopic.ph ... +partition

New hard drive in T22 won't boot - HELP!
http://groups.google.at/group/ibm.ibmpc ... aaa2c2856d

Failure to restore factory contents to C:
http://forum.thinkpads.com/viewtopic.ph ... +partition
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http://www.partitionsupport.com/utilities.htm

HTH