On Fri, Jan 18, 2019 at 04:47:42PM -0600, Eric Blake wrote: > It matches the code, but I just learned the code is buggy for anything > larger than 5. According to > http://tldp.org/HOWTO/Large-Disk-HOWTO-13.html, MBR Extended/Logical > partitions form a linked-list, something like: > > MBR: EBR1 EBR2 > +----------+ +----------+ +----------+ > + Part 1 + |->+ Part 5 + |->+ Part 6 + > + Part 2 + | + Next --------| + 0 + > + Part 3 + | + 0 + + 0 + > + Part 4 ------- + 0 + + 0 + > +----------+ +----------+ +----------+
Wikipedia's description is a bit better: https://en.wikipedia.org/wiki/Extended_boot_record In fact it's not strictly a linked list because the start record of each entry is relative to the extended partition start. It's all a bit weird. But you're right, nbdkit can neither read (nbdkit-partition-filter) nor write (nbdkit-partitioning-plugin) MBR logical partitions so we can't test interop or tell people to use nbdkit for this corner case. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com Fedora Windows cross-compiler. Compile Windows programs, test, and build Windows installers. Over 100 libraries supported. http://fedoraproject.org/wiki/MinGW
