On Wed, 17 Oct 2007, G T Smith wrote:-
<snip>
>You do not need dd (or mount), tar with with the DVD/CD device name as
>target does it nicely for reading (and writing). I would expect
>multi-volume tar to work in the same way as it would with a tape device
>in this scenario...
Would you mind letting me know just what options you used to make tar
write straight to a DVD? A few tests here, both as a normal user and
root, fail as shown below:
[EMAIL PROTECTED]:~> cd /usr/src/packages/SOURCES
[EMAIL PROTECTED]:/usr/src/packages/SOURCES> ls -l
total 236
-rw-r--r-- 1 davjam users 233501 2007-10-14 21:54
mplayerplug-in-3.45-0.pm.2.src.rpm
[EMAIL PROTECTED]:/usr/src/packages/SOURCES> tar cf /dev/hdc
mplayerplug-in-3.45-0.pm.2.src.rpm
tar: /dev/hdc: Cannot open: Read-only file system
tar: Error is not recoverable: exiting now
[EMAIL PROTECTED]:/usr/src/packages/SOURCES> tar cf /dev/dvdrw
mplayerplug-in-3.45-0.pm.2.src.rpm
tar: /dev/dvdrw: Cannot open: Read-only file system
tar: Error is not recoverable: exiting now
[EMAIL PROTECTED]:/usr/src/packages/SOURCES> tar c --file=/dev/dvdrw
mplayerplug-in-3.45-0.pm.2.src.rpm
tar: /dev/dvdrw: Cannot open: Read-only file system
tar: Error is not recoverable: exiting now
[EMAIL PROTECTED]:/usr/src/packages/SOURCES> sudo mount /dev/hdc /mnt
root's password:
mount: you must specify the filesystem type
[EMAIL PROTECTED]:/usr/src/packages/SOURCES>
[EMAIL PROTECTED]:/usr/src/packages/SOURCES> su -
Password:
lion:~ # cd /usr/src/packages/SOURCES
lion:/usr/src/packages/SOURCES # tar cf /dev/hdc
mplayerplug-in-3.45-0.pm.2.src.rpm
tar: /dev/hdc: Cannot open: Read-only file system
tar: Error is not recoverable: exiting now
lion:/usr/src/packages/SOURCES # tar cf /dev/dvdrw
mplayerplug-in-3.45-0.pm.2.src.rpm
tar: /dev/dvdrw: Cannot open: Read-only file system
tar: Error is not recoverable: exiting now
lion:/usr/src/packages/SOURCES # tar c --file=/dev/dvdrw
mplayerplug-in-3.45-0.pm.2.src.rpm
tar: /dev/dvdrw: Cannot open: Read-only file system
tar: Error is not recoverable: exiting now
Regards,
David Bolt
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