how can I sd card boot without bios?

jefro · 05-09-2017, 02:28 PM

This might be more than uefi. Might be one of those deals where they use a 64 bit loader to load a 32 bit (or reversed I forget).

Shadow_7 · 05-09-2017, 03:28 PM

A 32 bit bios trying to boot a 64 bit OS requires extra stuff like refind. More common for mac's from what I've heard. I've never had a need for it (yet). And not an issue if running a 32 bit OS. You don't have to run a 64 bit OS on a 64 bit machine. You just give up a few capabilities if you don't. RAM in excess of 4GB, and other stuff.

273 · 05-09-2017, 03:40 PM

Quote:

Originally Posted by AwesomeMachine

Built in SD Card readers are generally not bootable devices. You just have to use USB. You can get microSD cards and readers that only portrude 3/8" ~10mm.

I'm fairly certain this is the issue. As I mentioned above, neither of my laptops seems to be able to boot from the SD slot despite my being able to boot from USB and use both legacy BIOS and EUFI to boot an OS.

jefro · 05-09-2017, 09:39 PM

Some of those Atom based netbooks are goofy loaders in 32/64 issue.

dojohn · 05-10-2017, 03:29 AM

This is a 64 bit bios with celeron ...

Quote:

Originally Posted by Shadow_7

Plop is very "generic" and makes assumptions. That it's /dev/sdc (cdrom) and that you're trying to boot /dev/sda1. Which is less and less likely these days. Or at least that was my impression when I last used it (a decade ago?).

You can accomplish the same thing with grub, if you know the lingo. Or have a functional usb install to customize grub (update-grub) to boot the other thing. It is harder with UEFI, but not impossible. The two main things that prevent a functional boot is the root= parm that is passed to the kernel, and the contents of /etc/fstab. You can boot without a /etc/fstab, although with systemd, it mounts / as read-only when that is the case. Which complicates things, but can be worked around if you know the lingo (mount -o remount,rw /). Otherwise read-only means that any customizations do not take when you reboot, and any logging telling you what failed doesn't get written.

This sounds fantastic, but I wouldnt have a clue how to do it.

jefro · 05-10-2017, 02:59 PM

OK, celeron boards don't have that problem.

273 · 05-10-2017, 03:01 PM

Quote:

Originally Posted by jefro

OK, celeron boards don't have that problem.

I think, as with this 64 bit Celeron, the boot from SD is just not possible due to the bus topology.

jamison20000e · 05-10-2017, 03:22 PM

Boot SD to VM if you have the resources (or get em,) change BIOS, get external Blu-ray burner, use USB... just my random thoughts from one or a few posts.

jefro · 05-10-2017, 08:01 PM

Finding out the way the sd card attaches to system was my first suggestion back in #10.

Booting to usb to find how that is may be possible.

The sd to usb may work too if a bootable type.

dojohn · 05-11-2017, 08:39 AM

Quote:

Originally Posted by jefro

Finding out the way the sd card attaches to system was my first suggestion back in #10.

Booting to usb to find how that is may be possible.

The sd to usb may work too if a bootable type.

Which command would tell how the sd card attaches to the system?

fatmac · 05-11-2017, 09:09 AM

Why not save yourself some headaches & just boot to ram from a pendrive - once running you just remove the pendrive.

(Most motherboards do not boot from SD/SDHC/SDXC cards.)

jamison20000e · 05-11-2017, 10:39 AM

https://lists.gnu.org/archive/html/l.../msg00004.html