Re: Defect management with DVD-RAM on Linux?
Yuri Baranov <baranovu@gmail.com> wrote:
> Hi, everybody!
>
> When I chose DVD-RAM as the backup media for my data, the important
> factor was built-in hardware defect management.
>
> So I took for granted, that any OS which supports UDF writing, should
> also support automatic verification and reallocation of bad blocks.
>
> However, I recently has tried to copy a huge (about 4Gb file) database
> backup (Ubuntu Linux Server 8.04.3 , mount /dev/dvdram /mnt/dvdram &&
> cp /backup/hugefile /mnt/dvdram) I got a non-readable target file.
> dmesg output contained lines like
> [345555.460831] Buffer I/O error on device sr0, logical block 54040
>
> When I tried to copy smaller files (10-200Mb) to the disk - some of
> them copied OK and other still contained errors. Not every block of
> the medium was bad!
Did you try "sformat" from the schily source consolidation at:
ftp://ftp.berlios.de/pub/schily/
Jörg
--
EMail:joerg@schily.isdn.cs.tu-berlin.de (home) Jörg Schilling D-13353 Berlin
js@cs.tu-berlin.de (uni)
joerg.schilling@fokus.fraunhofer.de (work) Blog: http://schily.blogspot.com/
URL: http://cdrecord.berlios.de/private/ ftp://ftp.berlios.de/pub/schily
Reply to: