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Old 05-12-2020, 04:58 PM   #1
zimbot
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ubuntu install do something else


i have a windows 10 z620
when i attempt to install ubuntu 18.04 it does not show the option of install along side windows 10.
My question is
if I choose to "do something else"
and in the unallocatted area of the hard drive I make 2 partitions
swap = 32 Gb ( i have 16 GB of ram ) and the remainder of unallocated I formate as ext4 root " "

then how does the boot grub loader "know" to offer a choice of boot?

In previous dual boot builds i get the option of install along side.
But I am not getting that this time

hibernate is off
did a powercfg /hibernate off
my win fs is clean
did a chkdsk /f C: ...and Yes it ran on next boot , ok
fast boot is disabled in bios

and when i (f9) to get to the boot menu I see that i am booting uefi to the dvd live disk , i have also tried a usb thumb ...same story

Thanks in advance
 
Old 05-12-2020, 07:21 PM   #2
sp331yi
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Basic Info on GRUB, included in How2 Change Boot Order

Basic info on Partitioning
AKA "Something Else"

Old 'rule' of swap being 2X RAM goes back to W2k days. With 16GB, make a token swap of 762MB, don't need any more than this!

Basic rule of partitions: one /, one /home, and a swap. For sizes, see above. Servers differ.

Since 2005?

Last edited by sp331yi; 05-12-2020 at 07:23 PM. Reason: add info
 
1 members found this post helpful.
Old 05-13-2020, 06:21 AM   #3
fatmac
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Swap is only necessary on laptops if you need to hibernate - I just have a / & separate /home - a separate /home partition allows for re installing the O/S if needs be, without losing data - but it is always wise to have an external back up of all your personal data.

(Swap becomes a necessity if you do heavy processor intensive work or run a server.)

Quote:
My question is
if I choose to "do something else" - then how does the boot grub loader "know" to offer a choice of boot?
The installation media should ask you where to put the boot loader, & look for other O/S.

Last edited by fatmac; 05-13-2020 at 06:24 AM.
 
Old 05-13-2020, 06:24 AM   #4
yancek
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Did you run powercfg /hibernate off as administrator?

https://support.microsoft.com/en-us/...hat-is-running

Have you started the install of Ubuntu and if so, when you get to the installation type screen, do you see your windows partitions?
You can also use gparted from the Ubuntu installer to check this by opening a terminal and simply typing: sudo gparted
Check to see if windows partitions are visible.
You don't indicate if you have the default install of windows which is UEFI on a GPT disk?
Ubuntu has a site with a very detailed explanation on dual booting with windows 10 in UEFI mode so check that out at the link below.

https://help.ubuntu.com/community/UEFI
 
Old 05-13-2020, 09:47 AM   #5
zimbot
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i did do the powercfg /h off as administrator

i have since found that THIS win 10 install is mbr / legacy
so that is why a uefi boot to my ubuntu live dvd or usb do *not see the windows 10

i did a msinfo32 and can see the bios is legacy not uefi
i did a disk part , list disk and can see that the boot drive is not GPT ( no asterisk inder GPT )

so now I iether
attempt to install ubuntu 18 in mbr/legacy
or
convert the boot drive of ss-51 to uefi/GPT drive and bios to uefi ( the better idea )

win 10 has a mbr2gpt

gee whiz .... what to do?
 
Old 05-13-2020, 01:18 PM   #6
zimbot
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my solution

I booted to a usb ubuntu 1804 installer in legacy and installed via legacy bios
while this is not *best* ( uefi is a better option ) it was a solution for me

thanks all
 
  


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