On Sun, May 4, 2008 at 4:50 PM, jdd sur free
Mark Goldstein a écrit :
The MBR has only space for 4 partitions.
the table, yes
When you define logical disk,
as your friend said, some structure is written into the first sector of this partition and these records produce the "chain" of logical partitions. Since MS SW shall see these partitions (at least as "unknown"), I guess it should still be true.
I see. One place, probably at the beginning of the extended partition. 16 partitions available, four bytes offset?? 64 bytes??
Sorry, its a full sector each time, and more than one sector, but the sectors are spread around. For logical partitions the MBR points at EBRs (Extended Boot Records). Each EBR only describes one logical partition that immediately follows the EBR and effectively has a linked list to the next EBR. So if you create a bunch of logical partitions, you have written a EBR at the beginning of each and every one of those logical partitions. See http://en.wikipedia.org/wiki/Extended_boot_record FYI: All of that is for the standard DOS partitioning scheme. We seem to be in the middle of a very slow transition to GUID Partition Tables (GPTs). GPTs are needed to partition a drive 2TB or larger. Linux has support. MacOS now defaults to GPTs even for boot drives. Windows 64 bit Vista support GPTs for data drives. Greg -- Greg Freemyer Litigation Triage Solutions Specialist http://www.linkedin.com/in/gregfreemyer First 99 Days Litigation White Paper - http://www.norcrossgroup.com/forms/whitepapers/99%20Days%20whitepaper.pdf The Norcross Group The Intersection of Evidence & Technology http://www.norcrossgroup.com -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org