OS/2, eCS & ArcaOS - Technical > Setup & Installation
Install - screen goes blank when pmshell starts
Dave Yeo:
I have rEFInd setup here to boot to my legacy MBR SSD (and then airboot comes up) as well as my UEFI M2, it'll even boot the install stick in legacy mode allowing me to do a legacy install while in UEFI mode.
Much easier then using the F12 boot menu or going into the BIOS to change boot order.
Search for rEFInd on the main forum page.
Rich Walsh:
--- Quote from: Doug Clark on January 31, 2024, 05:50:48 am ---Thanks Rich. I was just about to ask whether something like this existed and I saw your post. I need it because I think I got rid of the files in the ESP.
--- End quote ---
'CSM2UEFI' is not going to fix - or even touch - your ESP. The following is what it fixes:
--- Quote ---when booted in UEFI mode the screen blanks and then shows static arranged as triangles spread across the screen for about 10 seconds - and then the desktop comes up normal as it should. Weird. When booted in legacy mode the desktop just comes up without the weird temporary static stuff.
--- End quote ---
You are booting UEFI using CSM base video drivers:
SET VIO_SVGA=DEVICE(BVHVGA,BVHSVGA)
vs.
SET VIO_SVGA=DEVICE(BVHEFI)
CSM2UEFI will pull 7 files from the ISO, put them in the right places, then update 2 lines in config.sys to give you UEFI-compatible text-mode and DOS video. As you've noticed, you don't need to do anythng to get PM and WinOS2 video working.
--- Quote ---So to avoid having to use the bios boot menu to get a legacy boot on my main drive (drive c:) I removed the ESP and installed AirBoot on the NVME. Big mistake - because now the mouse doesn't work.
--- End quote ---
You keep making it worse for yourself. Your ESP *MUST* be on your first drive and it MUST contain all UEFI bootloaders and boot managers for all operating systems. In contrast, your bootable partitions can be on any drive. Use MiniLVM to reinstall the AOS UEFI components.
Afterthought... you say you installed AirBoot on the NVME. Did you _really_ reformat the drive as MBR? Argggh...
Doug Clark:
--- Quote from: Rich Walsh on February 01, 2024, 06:45:56 pm ---Afterthought... you say you installed AirBoot on the NVME. Did you _really_ reformat the drive as MBR? Argggh...
--- End quote ---
Naahh - it was always formatted MBR. I figured life was complex enough without adding GPT to the mix.
I used MiniLVM - Boot Menu - Remove to remove the UEFI boot "manager" and then Boot Menu - Install and selected AirBoot. However the mouse doesn't work when booting through AirBoot, so I went back to MiniLVM to remove AirBoot and create the ESP partition and realized it was still there - the MiniLVM remove option doesn't actually delete the partition.
--- Quote from: Rich Walsh on February 01, 2024, 06:45:56 pm ---You keep making it worse for yourself.
--- End quote ---
With this experience I think I am going to adopt that as my motto. I know my wife would agree.
You know this UEFI, UEFI/CSM - boot stuff may not be rocket science but is still pretty complex. There is quite good documentation with rEFINd that goes into great detail about the booting - stuff I did not know. I was pretty happy under my rock until I had to get a new machine. Boy things have certainly changed in the last 10 years.
Thanks again Rich for your help - and everyone else.
[edit]
I forgot to ask. Does anyone recognize the boot menu/manager in the attachment? After going back to UEFI boot on the first drive, and installing reFind, when I boot os2ldr.efi with reFind the OS/2 boot blob appears in the upper left corner of the screen and then this boot menu. Which I think means this is coming from OS/2-AOS rather than the bios or reFind.
[/edit]
Dave Yeo:
About GPT. It is slightly slower due to the filter. It allows partitions that are aligned correctly, this is important for SSD's etc that use 4KB sectors as ideally the devices sectors and file systems (JFS) should align. Not only somewhat faster but in the case of SSD's, cuts down on wear. Write a one byte file and 4KB gets written. If sectors are not aligned, 8KB actually gets written with house keeping and garbage collection happening twice as often.
With GPT, you can use other partitioning tools and at the worse, have to go back and reassign the drive letter.
You can only boot GPT with UEFI, and you will have to add the GPT filter to older installs to rad the GPT disks
Personally, I have my 1TB NVMe device partitioned GPT with ArcaOS 5.1, a big data partition and Linux on it and my older half a TB SSD partitioned MBR with legacy installs. rEFInd allows me to boot to which ever I choose, with airboot on the MBR device then chain loading.
Edit: ESP is also on the 1TB NVMe device. I did have one on the regular MBR SSD device, which I added to the system after installing 5.1, things got confusing until I wiped that partition. As you found, hiding it is not good enough.
Roderick Klein:
--- Quote from: Dave Yeo on February 03, 2024, 01:33:13 am ---About GPT. It is slightly slower due to the filter. It allows partitions that are aligned correctly, this is important for SSD's etc that use 4KB sectors as ideally the devices sectors and file systems (JFS) should align. Not only somewhat faster but in the case of SSD's, cuts down on wear. Write a one byte file and 4KB gets written. If sectors are not aligned, 8KB actually gets written with house keeping and garbage collection happening twice as often.
With GPT, you can use other partitioning tools and at the worse, have to go back and reassign the drive letter.
You can only boot GPT with UEFI, and you will have to add the GPT filter to older installs to rad the GPT disks
Personally, I have my 1TB NVMe device partitioned GPT with ArcaOS 5.1, a big data partition and Linux on it and my older half a TB SSD partitioned MBR with legacy installs. rEFInd allows me to boot to which ever I choose, with airboot on the MBR device then chain loading.
Edit: ESP is also on the 1TB NVMe device. I did have one on the regular MBR SSD device, which I added to the system after installing 5.1, things got confusing until I wiped that partition. As you found, hiding it is not good enough.
--- End quote ---
David said at Warpstock (from Arca Noae) the performance impact is 15% slower then an MBR disc. So that is not to bad.
Honestly GPT is MUCH more compatible for setting up multiboot systems.
Roderick
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