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Re: ext4 filesystem not recognised on new LVM volume

From: Andrei Borzenkov
Subject: Re: ext4 filesystem not recognised on new LVM volume
Date: Wed, 17 Dec 2014 18:03:42 +0300

On Wed, Dec 17, 2014 at 5:41 PM, John Lane <address@hidden> wrote:
> On 15/12/14 13:28, Andrei Borzenkov wrote:
>> On Mon, Dec 15, 2014 at 3:51 PM, John Lane <address@hidden> 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.

> I am doing
> grub> ls (hd1,1)/
> etc.

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