I have a UEFI machine with Leap 15.3, that i’d like to put in a legacy machine(expensive repairs needed to the AIO UEFI machine).
Is it possible to change the UEFI HDD so I can put it in the legacy unit without messing things up badly?
And one of our laptops have Leap and Win 10 installed under CSM.
Possible to change both systems to UEFI with out fubaring both OS’s?
more dumb questions by a resident nuub user.
Hi
Legacy boot and UEFI boot… no…
What’s up with the All-In-One system?
Actually, yes, that’s a relatively easy change. But it may depend on how fussy the BIOS is. If you are using “btrfs” it become a bit more complex, but is still doable.
And one of our laptops have Leap and Win 10 installed under CSM.
Possible to change both systems to UEFI with out fubaring both OS’s?
That’s a harder change, because you need to add an EFI partition. And, depending on how fussy is the UEFI firmware, you might need to switch to GPT partitioning.
In either case, more information would be useful before I try to fill in the details.
It is an HP AIO, and sometimes I have to boot it several times.
I get start up errors telling me no disk found(it is there, I put in in about 6 months back). In that case I have to hit esc key, go down the menu to boot options, and select Opensuse. Then it boots and works good.
Other times the screen starts flashing red,green,blue,white, on & on until I push the power button. That is a graphic card problem IMO! And is built onto the MOBO(I think).
It has a new HDD and is UEFI, and only has Leap 15.3 on it that I wanted to (hopefully convert) & put in the HP tower(legacy).
TOPIC 1
The BIOS in the older HP tower is old and likely to be ‘fussy’.
TOPIC 2
Let me know what you need, and I will gather it up and start another thread just for that.
BTW, I don’t use ‘BTRFS’ on any of my leap installs.
In both cases, we would need to see the output from:
fdisk -l
or perhaps just
fdisk -l /dev/sda
(except replace “/dev/sda” by whatever is appropriate.
Your disk is likely to be partitioned with GPT partitioning. If you want to boot from the MBR, then you need a bios_boot partition. It is usually possible to fit one in the empty space between sector 34 and sector 2047. The alternative is to boot from the partition containing “/boot”.
And older BIOS might have problems reading partitions to far down the disk drive. In that case, you might need a partition for “/boot” that is closer to the start of the drive.
TOPIC 2
Let me know what you need, and I will gather it up and start another thread just for that.
BTW, I don’t use ‘BTRFS’ on any of my leap installs.
You will need an EFI partition. If the disk already uses GPT partitioning, then things are easier. I have been successful with UEFI booting using legacy MBR partitioning, but it depends on how well the BIOS (or UEFI firmware) supports this. I think they all support this on removable drives, but perhaps not on an internal drive.
In any case the “fdisk” information will help us see what are the possibilities.
HDD cannot be UEFI.
With Linux you can use GPT HDD with legacy BIOS boot.
About laptop: 1 HDD, both OSes on it?
If so, only clean install can help.