iso9660 format USB drive

[Ed P]

Windows can't access the files on the drive, Linux can. How do I boot it?

The files on the drive are those from a bootable .iso file. Grub2Win sees is it as hd0 msdos.

No EFI folder.

[Drummer]

Hey Ed,

So how is the partition on your USB drive formatted? What filesystem.

Please plug the drive in, run current Grub2Win diagnostics and send them to me. Then I can hopefully see the partition block 0 format as well as the hardware info.

Please let me know.

Thanks,

Dave

[Ed P]

Hi Dave,

I was wrong, the drive does have a EFI folder.

guest@porteus:/mnt/sda1$ ls -hon
total 8.0K
drwxr-xr-x 3 0 2.0K Aug 12 2023 EFI/
-r--r--r-- 1 0 1.6K Mar 5 2024 USB_INSTALLATION.txt
dr-xr-xr-x 4 0 2.0K Mar 3 2024 boot/
dr-xr-xr-x 6 0 2.0K Aug 12 2023 porteus/
guest@porteus:/mnt/sda1$

The drive was originally FAT32. The linux command that changed it was:

wget -O- $ID | sudo dd bs=1M of=/dev/$OD

It downloaded a bootable .iso file and wrote it to the FAT32 USB drive.

Before:
Output device
sda 28.9G
└─sda1 vfat PORTEUS501 28.9G

After
└─sda1 iso9660 Porteus 28.9G 3.9G

The drive had a Portues system on it that was bootable by manually copying the files in the .isso to the USB drive and running it's install app.

Looking for the drive when booting, F10, does not show it as an optinn.

hmmm Maybe I need to run the install app again. .....

[Ed P]

Nope, install app didn't help. Still iso9660 format. Still a CD and Windows 11 can't see the files.

[Drummer]

Hey again Ed,

Grub2Win diagnostics please. With the CD plugged in.

The diagnostics can display info on about 280 partition types. Although it cannot read all of them, it can at least give us some insight as to the nature of the drive and its partitions.

Thanks,

Dave