On 17/12/14 17:46, Andrei Borzenkov wrote: > В Wed, 17 Dec 2014 15:42:02 +0000 > John Lane <[email protected]> пишет: > >> On 17/12/14 15:03, Andrei Borzenkov wrote: >>> On Wed, Dec 17, 2014 at 5:41 PM, John Lane <[email protected]> wrote: >>>> On 15/12/14 13:28, Andrei Borzenkov wrote: >>>>> On Mon, Dec 15, 2014 at 3:51 PM, John Lane <[email protected]> wrote: >>>>>> On 15/12/14 12:27, John Lane wrote: >>>>>>> I'm going to wipe the disk and start over and see if I can reproduce it. >>>>>>> >>>>>>> >>>>>> Ok, I believe this is a 2TiB issue. >>>>>> >>>>>> I just wiped the disk, created a new PV on it and created 3 LVs on the >>>>>> PV. >>>>>> >>>>>> LV1 5GiB ext4 >>>>>> LV2 2TiB ext4 >>>>>> LV3 5GiB ext4 >>>>>> >>>>>> Grub can read LV1 and LV2 but not LV3. >>>>>> >>>>> And if you create physical partitions of the same size? >>>>> >>>> Sorry for delay in responding but I needed to use the disk as a transit >>>> drive. >>>> >>>> Anyway, I just created a new GPT with partition 1=5G, 2=2T and 3=5G. >>>> I wrote new ext4 filesystems to each of them. >>>> >>>> grub can read partitions 1 and 2 but not partition 3. >>>> >>> I suspect it hits BIOS 2TB limit. If you have AHCI compatible >>> controller, you could try command "nativedisk" which attempts to >>> switch from BIOS to native AHCI. No guarantee that it will work; but >>> if it will, it should lift 2TB limit. Better try with git master. >> that works. I never knew about "nativedisk". > It is more of a debug tool. Note that AHCI driver has its downside - > e.g. it is impossible to chainload anything, because it relies on BIOS > interface and we cannot go back to BIOS after AHCI driver run. And of > course it gets far less test coverage. If you are OK with it you can > build core.img to use native drivers: > > grub-install --disk-module=native ... > I'll keep that in mind, but the scenario won't likely happen in real use as the root volume will (should?) be in the first 2TiB anyway. >> grub> ls (ata0,3)/ >> >> Also works with LVM. > Yes, sure. But it is still fishy; I wonder what happens here. Is it 4K > disk by any chance? > Yes, I've been testing with a 4TB ST4000VN000 which has 4k sectors. >>>> I am doing >>>> >>>> grub> ls (hd1,1)/ >>>> >>>> etc. >>>>
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