ESOS boots in BIOS mode, but not in UEFI mode

[Eugene Chow]

Hi Marc,

I'm using ESOS 0.18 on a HP Proliant DL380p. I found that ESOS refuses to boot from the thumbdrive in UEFI mode, but it works in BIOS mode.

However, I have a 7.2TB RAID array that I created using the HP Smart Array tool. When booted in BIOS mode, only 2.2TB can be seen.

Is it possible to boot ESOS in UEFI mode? Otherwise, what do you suggest that I do to remedy this.

Thanks!

Disclaimer: This is my first time configuring a SAN so please pardon my newbie questions.

[Stuart Hopkins]

Eugene,
    Is ESOS reporting that the disk is only 2.2TB? I've had >2TB disks before and while the BIOS will report them around the 2TB mark, Linux detects the disk correctly once the controller driver is loaded. At least for me, it was only a visibility issue during POST rather than a usability issue.

Stuart

[Marc Smith]

Hi Eugene,

ESOS does not support EFI mode at this time. Something we'll need to
look at in the future, but for now stick to legacy mode in your UEFI
setup. As Stuart mentioned, inside of Linux (ESOS) the device should
appear as the correct size. Don't use the "fdisk" tool for
partitioning as this will make the device only appear 2 TB in size
(when its actually larger). Use "parted" for partitioning.

Please send the kernel messages (dmesg output or /var/log/kern.log) if
you believe the device is still not reported correctly when booting in
UEFI legacy / BIOS mode.


--Marc

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[Steve Jones]

Agreed - I've got 4tb and an 8tb drive hooked up to my ESOS, although just through the MoBo SATA connector, not through a fancy raid controller, and it works fine..  My understanding is that the limitation for BIOS mode is that the only limitation is not to be able to BOOT a system from a drive over 2tb, but once it's booted, any size is fine, depending on the OS and controller..

On Fri, Feb 5, 2016 at 10:36 AM, Stuart Hopkins <s...@lifeofstu.com> wrote:

--

[Eugene Chow]

You guys are right. I was using fdisk, and I found out shortly that it can't handle drives larger than 2TB. My bad...

Are there any known issues booting in Legacy BIOS mode, rather than UEFI?

Many thanks!

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[Marc Smith]

On Fri, Feb 5, 2016 at 10:38 PM, Eugene Chow <eugene....@gmail.com> wrote:
> You guys are right. I was using fdisk, and I found out shortly that it can't
> handle drives larger than 2TB. My bad...
>
> Are there any known issues booting in Legacy BIOS mode, rather than UEFI?

None that I'm aware of -- going back to my computer architecture class
if I remember right: The BIOS/UEFI passes control of the CPUs to the
operating system (eg, ESOS) so once they are done, that's it.

--Marc