acd0: FAILURE - READ_BIG MEDIUM ERROR

Pav Lucistnik pav at FreeBSD.org
Fri Sep 17 07:08:07 PDT 2004


V pá, 17. 09. 2004 v 15:59, Fabian Keil píše:
> On Friday 17 September 2004 08:25, Søren Schmidt wrote:
> > Jun Kuriyama wrote:
> > > When I tried to read DVD-R media (written on the same current box by
> > > cdrecord-ProDVD), I got this message at mounting:
> > > 
> > > -----
> > > acd0: FAILURE - READ_BIG MEDIUM ERROR asc=0x15 ascq=0x00 error=0
> > > acd0: FAILURE - READ_BIG MEDIUM ERROR asc=0x15 ascq=0x00 error=0
> > > cd9660: RockRidge Extension
> > > -----
> > > 
> > > Is this harmless or not?  I can copy a file from this DVD-R without
> > > problem.
> > 
> > Looks like you isofs is bad...
> > 
> > > And, this DVD-R has a large file (3GB), and ls(1) (maybe stat(2))
> > > issues an error like this:
> > 
> > Uhm , you cannot have file > 1G on a comliant isofs...
> 
> Compliant to what?

Compliant to ISO9660 specs.

> Quote from <http://www.uwsg.iu.edu/hypermail/linux/kernel/0402.0/0708.html>:
> 
> > The kernel (2.6 and 2.4) has the following code in isofs_read_inode():
> >
> > /*
> > * The ISO-9660 filesystem only stores 32 bits for file size.
> > * mkisofs handles files up to 2GB-2 = 2147483646 = 0x7FFFFFFE bytes
> > * in size. This is according to the large file summit paper from 1996.
> > * WARNING: ISO-9660 filesystems > 1 GB and even > 2 GB are fully
> > * legal. Do not prevent to use DVD's schilling at xxxxxxxxxxxx
> > */ 

And? This means that Linux kernel can handle ISO9660 filesystems of any
size, with files in them not larger than 2 GB.

Other systems can have different abilities. 1 GB of file size is
something that will work everywhere.

-- 
Pav Lucistnik <pav at oook.cz>
              <pav at FreeBSD.org>

Go back to bed America, your government is in control again. Here's American
Gladiators. Watch this, shut up. Here's 56 channels of it. Watch these
pituitary retards bang their fuckin skulls together and congratulate you on
living in the land of freedom.
  -- Bill Hicks
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