friends
I have a hp z620 that has a 1 TB drive
It currently boots windows 10.
I have made ~ 460 GB free space ( unallocated / raw )
I have ran a fsck upon a windows start - the file sys is clean
I have disabled in the bios secure boot // fast boot

Here is my problem - when I boot to the ubuntu Live disk and select install
It does *NOT* see my windows
I never get the "install along side" windows

Q1- what might I be missing here?
Q2-
If I go down the path of "do something diffrent"
what is a good idea?
like---
make 2 partitions
swap = 32 MG ( i have 16 Gb of ram )
and the remain is all "/" root ? ( approx 430 GB )

and then if i do install that way
Q3-
how does grub know about my 2 choices -- how does that work

I have made several dual boot systems ... i always get the install along side... but this time -- i do not.

Thanks in advance

cheers

jS

What you are missing is not having read the Ubuntu documentation on dual booting with windows 10 which is at the link below. Most likely scenario is that you have left fastboot and/or hibernation on in windows and your Ubuntu won't mount hibernated drives so you won't see them in the installer and of course, won't see the install alongside option.

https://help.ubuntu.com/community/UEFI

thanks for the repluy and the link

but

it is not hibernation
i did a { in windows admin cmd ] powercfg /h off ( which should turn off hibernation )
and I have done a chkdsk /f c: and it did run on next boot ...so I think my win fs is clean
and in bios of this hp z620
under secure boot configuration
both fast boot and secure boot are disabled
(( humm maybe I should try with Secure Boot on ))

I also see that my dvd optical is ( in boot config of bios) is uefi
and that seems to be confirmed by ( as shown in the link you kindly provided )
I see a screen of
try Ubuntu
install Ubuntu
check the disk
when i boot to the dvd live installer

but I still do not get the "install along side" option which is ( i think )
the 3rd screen of the Ubuntu 18.04 64b installer.

I wonder what I have wrong

control panel>power settings>what the power button does>advance options>disable fast boot if it exist.

Ubuntu (and Mint which I have in the house) have had issues with the installer not recognising NTFS and wanting to use the entire disk. From the liveUSB go here and do as it says. Then we can see the boot environment.
I always pre-allocate the partitions and simply mount to the appropriate mount-points in the partitioner of the installer. Don't forget to mount the EFI.

Edit: didn't see the last half of the initial post.
I use 2G swap everywhere - it can be increased easily later. Áll the rest as one /root is most convenient - no resizing/moving partitions later.
Grub will go find Windows and add it to the boot menu automagically; it uses os-prober to do the leg-work.

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