[DragonFlyBSD - Bug #3336] (Closed) CAM probe removes boot device

bugtracker-admin at leaf.dragonflybsd.org bugtracker-admin at leaf.dragonflybsd.org
Mon Jan 16 19:57:28 PST 2023

Issue #3336 has been updated by aswell.

Status changed from Feedback to Closed

aswell wrote in #note-2:
> This may be difficult to troubleshoot, as the issue may be related to the way the IMG/ISO's are mounted...However, will post hardware info once booted into a working OS, in case there is an obvious solution.

After reading thru some archived mail threads about issues with CAM and booting, it appears resolving this issue without access to the KVM device and machine likely won't be possible. 

Therefore, I will close this issue to save everyone time. 

Thanks for the followup. Good to see people monitoring these reports...

Bug #3336: CAM probe removes boot device

* Author: aswell
* Status: Closed
* Priority: Normal
* Target version: 6.6
* Start date: 2023-01-15
Attempting to install DragonFly from USB mounted ISO, via an IP-KVM provided by a dedicated server provider. After kernel loads, installer fails looking for rootvp:
<pre><code class="shell">
CAM: Configuring 8 busses
(probe9:umass-sim1:1:0:0): inquiry data fails comparison at DV1 step
CAM: finished configuring all busses
Device Mapper version 4.16.0 loaded
dm_target_error: Successfully initialized
dm_target_zero: Successfully initialized
(cd8:umass-sim1:1:0:0): got CAM status 0x44
(cd8:umass-sim1:1:0:0): fatal error, failed to attach to device
(cd8:umass-sim1:1:0:0): lost device
(cd8:umass-sim1:1:0:0): removing device entry 
iso_mountroot: can't find rootvp
Root mount failed: 6
Mounting root from cd9660:cd8
no disk named 'cd8'
Mounting root from cd9660:cd9
no disc named 'cd9'
Mounting root from cd9660:/dev/cd0
no disk named 'cd0'

Manual root filesystem specification:

<fstype>:<device> Specify root (e.g. ufs:da0s1a)
?     List valid disk boot devices 
The ISO booted via /dev/cd8, but a CAM probe failed for some reason, which then removed cd8, causing the installation to fail.

Finishing the installation using alternate means, filing this report for future reference, in case there is an easy fix...

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