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Re: Boot external sata Legacy gpt ssd via usb?

From Marco Moock <mm+usenet-es@dorfdsl.de>
Newsgroups comp.sys.laptops.thinkpad
Subject Re: Boot external sata Legacy gpt ssd via usb?
Date 2024-01-22 09:06 +0100
Organization A noiseless patient Spider
Message-ID <uol7n2$l1ja$3@dont-email.me> (permalink)
References <KLycnc4LV9ciQjD4nZ2dnZfqnPidnZ2d@giganews.com>

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Am 21.01.2024 um 22:23:42 Uhr schrieb bad sector:

> The BIOS boot setting says "BOTH, EFI first" and Secure-Boot is 
> disabled. Does that mean that it should boot either EFI or Legacy
> drives?

EFI/BIOS boot method is specific to the installed OS, not to the disk
itself.
Both/Hybrid means it can use both boot methods, but when selecting the
boot device, there might be 2 entries, one for EFI boot and one for
BIOS boot, per disk.

> I wanted to just take a 2.5" gpt sata ssd from my Linux desktop and
> plug in into a usb port on the T470. That didn't work, not even with
> boot set to 'Legacy Only'.

Is that a BIOS or UEFI boot method on the disk?

> Next I installed a Suse system from a DVD connected to a usb port and 
> onto a sata ssd connected to another usb port. The installation went
> OK and I thought it was set up for EFI boot. But when I boot the T470
> with this just installed system connected to a usb port, pressing
> 'Enter' for the alternative temporary boot menu, that menu never
> shows up (until I unplug the ssd from the usb port).

UEFI boot enabled?
Can you boot UEFI USB sticks?

Can you boot from the disk when connected to the SATA port?

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Thread

Boot external sata Legacy gpt ssd via usb? bad sector <forgetski@_INVALID.net> - 2024-01-21 22:23 -0500
  Re: Boot external sata Legacy gpt ssd via usb? Marco Moock <mm+usenet-es@dorfdsl.de> - 2024-01-22 09:06 +0100
    Re: Boot external sata Legacy gpt ssd via usb? bad sector <forgetski@_INVALID.net> - 2024-01-22 13:53 -0500
      Re: Boot external sata Legacy gpt ssd via usb? Marco Moock <mm+usenet-es@dorfdsl.de> - 2024-01-22 21:43 +0100
        Re: Boot external sata Legacy gpt ssd via usb? bad sector <forgetski@_INVALID.net> - 2024-01-22 15:57 -0500
  Re: Boot external sata Legacy gpt ssd via usb? bad sector <forgetski@_INVALID.net> - 2024-01-22 21:07 -0500
    Re: Boot external sata Legacy gpt ssd via usb? Marco Moock <mm+usenet-es@dorfdsl.de> - 2024-01-23 08:55 +0100
  Re: Boot external sata Legacy gpt ssd via usb? bad sector <forgetski@_INVALID.net> - 2024-01-23 23:26 -0500

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