Bug 28172

Summary: No device /dev/wd0s1a present by default, but kernel uses it as a fallback
Product: Base System Reporter: conrad <conrad>
Component: i386Assignee: freebsd-bugs (Nobody) <bugs>
Status: Closed FIXED    
Severity: Affects Only Me    
Priority: Normal    
Version: Unspecified   
Hardware: Any   
OS: Any   

Description conrad 2001-06-15 12:40:01 UTC 
In some cases, for instance if your /etc/fstab is corrupted, the 4.3R
kernel mounts / as wd0a for IDE drives. However, there is no device
to remount root to rw (/dev/wd0a does not work, /dev/wd0s1a is not present)

This is only a small thing, but since nowadays the boot device on IDE
depends on the hardware (ad0 or ad4), this might be a problem for many people

Fix: 

Either include /dev/wd0s1a by default
or make the kernel mount using the ad driver if fstab is present
How-To-Repeat: delete fstab, reboot :-)
Comment 1 ru freebsd_committer freebsd_triage 2001-06-23 10:43:34 UTC 
State Changed
From-To: open->closed

Old `wd' compat device support was dropped in 4.3-STABLE, 
sys/dev/ata/ata-disk.c,v 1.60.2.13.