Re: Defect management with DVD-RAM on Linux?

Yuri Baranov <[email protected]> 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:[email protected] (home) Jörg Schilling D-13353 Berlin
       [email protected]                (uni)  
       [email protected] (work) Blog: http://schily.blogspot.com/
 URL:  http://cdrecord.berlios.de/private/ ftp://ftp.berlios.de/pub/schily


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