bin/103845: sha256 /dev/acd0 returns immediately

[Helmut Schellong]

>Number:         103845
>Category:       bin
>Synopsis:       sha256 /dev/acd0  returns immediately
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sat Sep 30 06:30:14 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator:     Helmut Schellong
>Release:        6.2 BETA1
>Organization:
>Environment:
See above. (BETA has no X)
>Description:
sha256 /dev/acd0  returns *immediately*
with a wrong checksum.

CD content is BETA1-disc1.

dd if=/dev/acd0 of=/usr/z bs=4b; sha256 /usr/z; rm /usr/z
works fine.
>How-To-Repeat:
command again.
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted: