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On 09/05/14 19:57, James wrote: |
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>Todd Goodman <tsg <at> bonedaddy.net> writes: |
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> |
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>> What does 'gdisk -l /dev/sda' say about GPT and MBR (it usually says |
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>> whether you have a valid GPT and/or MBR before printing information |
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>> about the partitions.) |
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> |
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>gfisk does not seem to be in the tree. That's the old name for the |
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>"gptfdisk" now in the portage tree. The name is now consistent |
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>with upstream. (/sys-apps/gptfdisk) |
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> |
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> |
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> |
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>> As others have mentioned, you need that BIOS boot partition for GRUB2 to |
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>> embed its core.img into since there's no post-MBR gap for it to use with |
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>> GPT. This is different than the partition you mount as /boot. |
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> |
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>> Your BIOS should be able to boot GPT drives but it can be flaky |
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>> depending upon motherboard in my experience. |
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> |
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>> If using GPT drives to boot with BIOS you want a protective MBR which |
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>> encompasses the entire drive (or first 2.2TB if the drive is larger than |
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>> that as that's as big as MBR can handle.) It has type 0xee. |
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> |
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>> You can create that gdisk (by going into the eXpert menu) or you can use |
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>> fdisk to create it. |
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> |
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>Maybe gdisk is on the installation iso? It's not in the portage tree, but |
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>it use to be: |
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> |
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>http://sources.gentoo.org/cgi-bin/viewvc.cgi/gentoo-x86/sys-apps/gdisk/?hideattic=0 |
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> |
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>gdisk and gptfdisk are the use the be the same software.. |
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With a GPT partition and old BIOS 2008 system, I need to set the bootable flag on the protective MSDOS partition. Thats all the BIOS can see. |
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I need to use an older fdisk and ignore the dire warning about a GPT partition table being detected. |
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But where to find older fdisk and in stall it from chroot environment. |
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-- |
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Joseph |
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