fdisk sd0 returns nothing as does fdisk /dev/rsd0c.

As noted in the try to install on sd0 after editing partition table I get:
----------------------------
sd0*> p
OpenBSD area: 0-61554688; size: 61554688; free: 2097176
#                size           offset  fstype [fsize bsize   cpg]
  a:         55499552          6055136  4.2BSD   2048 16384     1 # /
  b:          3957960          2097152    swap
  c:         61554688                0  unused
sd0*> w
disklabel: DIOCWDINFO: Input/output error
disklabel: unable to write label
---------------------------
I have 7.8 running just fine on four apu2 boxes (amd64).

I rather think the problem lies with u-boot for arm64 on this device not 
initializing things.
e.g., no sd0 support and no second ethernet device.

Still looking.

On 11/16/25 15:59, Crystal Kolipe wrote:
On Sun, Nov 16, 2025 at 01:30:35PM -0800, Glen Gunsalus wrote:
unable to do anything with sd0,

[ ... ]

radxa-sd# fdisk /dev/sd0
fdisk: /dev/sd0 is not a character device

The character device is /dev/rsd0c, not /dev/sd0.

Fdisk also supports just specifying E.G. sd0 without /dev/.


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