Re: 2.6.0, cdrom still showing directories after being erased

[Jens Axboe <axboe@suse.de>]

On Thu, Feb 05 2004, Pavel Machek wrote:
> Hi!
> 
> > > I believe he meant to write he umounted it.
> > > The problem is that there is still some data left in CDRW's cache and it 
> > > needs to be emptied. That happens when CDRW is ejected and reinserted 
> > > (that is why windows burning software ie. Nero wants to eject the CDR/RW 
> > > when it gets written or erased).
> > > Maybe kernel could flush the buffers/caches or whatever is there when 
> > > CDROM gets mounted. But im afraid about compatibility with broken drives 
> > > such as LG.
> > 
> > There's no command to invalidate read cache, you are probably thinking
> > of the SYNC_CACHE command to flush dirty data to media (which is what LG
> > fucked up).
> > 
> > IMO, it's a user problem.
> 
> Does not look like so.
> 
> mount
> umount
> cdrecord -blank
> mount
> see old data
> 
> That looks pretty bad. If there's no other solution, we might just
> document it, but...

Nonsense. Even if the above was what the user did (I believe he didn't
umount the device before blanking it), then it'd be a hardware "bug".
It's common to require an eject to completely clear the cache.

-- 
Jens Axboe