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Old 08-25-2022, 04:53 PM   #1
jr_bob_dobbs
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OpenBSD faq, question on ISO on USB stick


So in the FAQ for OpenBSD, we find at https://www.openbsd.org/faq/faq4.html the following directions for making a bootable USB from the OPenBSD CD ISO:
Quote:
A bootable USB flash drive can be created by attaching the target device and copying over the image with dd(1).

Using OpenBSD, assuming the device was recognized as sd6:

# dd if=install*.img of=/dev/rsd6c bs=1M

Note that the raw I/O device is used: rsd6c rather than sd6c.

Details of this will vary on other platforms. If you're using a different OS, be sure to select the appropriate device name: /dev/sdX on Linux or /dev/rdiskX on macOS for example.
Has anyone, in recent times, tried this? Did it work? I tried it today and the USB is not bootable. My computer, when rebooting quietly ignores the USB and goes to my usual boot loader menu screen.

Is the FAQ correct?

Thank you.
 
Old 08-25-2022, 05:13 PM   #2
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Quote:
Originally Posted by jr_bob_dobbs View Post
So in the FAQ for OpenBSD, we find at https://www.openbsd.org/faq/faq4.html the following directions for making a bootable USB from the OPenBSD CD ISO:

Has anyone, in recent times, tried this? Did it work? I tried it today and the USB is not bootable. My computer, when rebooting quietly ignores the USB and goes to my usual boot loader menu screen.

Is the FAQ correct?

Thank you.
yeah, has worked always for me.
last installation i did maybe 2 weeks ago worked.
 
Old 08-26-2022, 04:13 AM   #3
jggimi
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For clarity: the bootable CD9960 ISO (optical drive) image has a filename ending with ".iso". The bootable mass storage (disk drive) image has a filename ending with ".img". Optical drives must be burned with the ".iso" file, USB sticks or other mass storage devices must be overwritten using the ".img" file. OpenBSD does not use hybrid optical/mass storage media images.

Last edited by jggimi; 08-26-2022 at 04:15 AM.
 
3 members found this post helpful.
Old 08-26-2022, 10:18 PM   #4
jr_bob_dobbs
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Quote:
Originally Posted by jggimi View Post
For clarity: the bootable CD9960 ISO (optical drive) image has a filename ending with ".iso". The bootable mass storage (disk drive) image has a filename ending with ".img". Optical drives must be burned with the ".iso" file, USB sticks or other mass storage devices must be overwritten using the ".img" file. OpenBSD does not use hybrid optical/mass storage media images.
Bam, that was it.

After downloading the img and dd'ing to the usb stick, it booted fine.

Thank you.
 
Old 08-27-2022, 04:28 AM   #5
fatmac
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Your quote of the instructions does say .img when making a USB stick/pendrive.

Quote:
# dd if=install*.img of=/dev/rsd6c bs=1M

Last edited by fatmac; 08-27-2022 at 04:29 AM.
 
Old 08-28-2022, 04:35 PM   #6
jr_bob_dobbs
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Quote:
Originally Posted by fatmac View Post
Your quote of the instructions does say .img when making a USB stick/pendrive.
Yeah I know, now. I look like an idiot.

But hey, I use Linux. so I can't be a total idiot, right?
 
  


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