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Re: USB3 3TB HDD boot

From: Vladimir 'φ-coder/phcoder' Serbinenko
Subject: Re: USB3 3TB HDD boot
Date: Mon, 04 Mar 2013 19:46:02 +0100
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On 04.03.2013 17:27, Bob Lemar wrote:

> Thank you for your replies.
> Yes, it is definitely BIOS problems as it doesn't allow to boot from
> external drive directly (via BIOS boot order settings). It doesn't
> show this drive at <F10> boot menu even after soft reboot. So BIOS
> doesn't provide access to GRUB like to any other drives or USB
> flashes.
> And I suppose to think that it is not a bug, it is a feature. And
> feature of external drive, not a BIOS.

Wrong. Not supporting 4K disks is simply a lack of support, nothing
else. As for manufacturers producing such drives reasons are several and
partially in an attempt to mitigate msdos partition limitation.

> - BIOS behavior is correct (it power up USB);

It has also to propose the disk to boot from and if chosen, boot from it.
> - Ales, you were absolutely right with floppy for booting CD trick

> example. While MB, HDD firmwares and bootloader have predictable and
> correct behavior some users would like to have bootloader feature
> (GRUB command) that wake up external HDDs and re-detect drives.

BIOS accessing disks is already wakeup enough.> I did: (1) clone linux
to external drive; (2) correct fstab at.
You can access the disk in GRUB using own GRUB modules but you can't
chainload on such drives as it would require BIOS support.

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