Panic on mount with write-locked USB media (umass)

Poul-Henning Kamp phk at phk.freebsd.dk
Wed Apr 6 03:55:37 PDT 2005


In message <200504060845.j368jXiU001289 at peedub.jennejohn.org>, Gary Jennejohn writes:
>Robert Watson writes:
>> I wonder if a useful middle ground is to adopt (1) above except in the 
>> case of perenially read-only file systems (cd9660), in which case (2) is 
>> adopted?
>> 
>
>It sure would be nice if one could mount an ISO-image (vnode-backed md)
>RW.

All it takes is somebody to rewrite cd9660 to be a r/w filesystem :-)

It's not trivial though, because iso 9660 is essentially a sequential
archive with a index up front, so if you change the size of one file
all the ones after it move as well.  I guess as long as you don't
want to make any files longer it would be relatively possible.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.


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