David Kelly pisze:
On Thu, Dec 04, 2008 at 12:44:14PM -0500, Steve Polyack wrote:
Not too say you're .iso images can't be >2GB/4GB, but I'm pretty sure
the ISO9660 standard is limited to a 2GB maximum file size (for files
within the .iso). You must use UDF to burn files of greater size.
mkisofs(8) seems to support this, if only in alpha/hybrid stage:
-udf Include UDF support in the generated filesystem image. UDF sup-
port is currently in alpha status and for this reason, it is not
possible to create UDF only images.
It would seem then that the O.P. who is already splitting his backup
into 4.3GB chunks should split backups into sub-2GB chunks.
4,700,000,000 is the standard DVD size, I'd shoot for chunks of 4.5E9/3
so as to have about 200MB of headroom per DVD.
growisofs will write 3 files to the DVD just as easily as one. The magic
of growisofs is that it invokes mkisofs on the fly. And also that
cdrecord had obnoxious (and broken) licensing in years past when I last
tried it.
Yes, I know that. My reasons for keeping one file on DVD are just for
making my life easier.
If I want to restore some files from filesystem backup (they are made
via pipeline dump | gunzip | split) I have to copy all files from DVDs
wchich includes needed filesystem and then I type:
cat file1 file2 file3 ... fileN | gunzip | restore -if -
And yes, I know that tapes are much better for tasks like this but for
now I just have to use DVDs :)
Now imagine backup placed on 10 DVDs. With single file on DVD I have 10
files to manage, not 30. I know there're workarounds but with more files
I probably will need some script to restore files rather than do it
manually. That's the reason I asked if there's a possibility to burn it
this way from FreeBSD.
--
Bartosz Stec
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