On Thursday 28 January 2010 7:26:24 am Dimitry Andric wrote: > On 2010-01-28 13:06, Robert Noland wrote: > > John or Marcel can correct me, but I don't think that this is an issue. > > The bootstrap is located in the pmbr in sector 0 and the GPT headers and > > tables are in sectors 1 - 34. The bootstrap code knows how to read the > > GPT tables and can deal with> 2 tb lba's. > > Ah yes, I see it now. It uses EDD packets with the BIOS int 13 > interface, which apparently have a 64-bit LBA. This should support up > to 8 ZiB with 512-byte sectors... > > OTOH, I have no idea how well most BIOSes actually implement this. > Since many OSes simply don't support anything over 2^32 sectors, I would > not be amazed to find much BIOSes out there that behave the same. Or am > I too paranoid now? :)
It should work fine. The GPT boot code was originally written specifically to supporting booting from RAID volumes > 2TB. I've tested it on mfi(4) volumes that large (though I didn't verify the individual LBAs of all the various bits read in by the bootstrap and loader were). I know that other folks ran into bugs until the ZFS GPT boot code was all made 64-bit clean and that they have since booted > 2TB ZFS volumes ok. -- John Baldwin _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"