On 4 Jul., 15:10, Rodolfo Medina <[EMAIL PROTECTED]> wrote: > A few days ago I by chance realized that the DVD-RW I had used for months to > do may backup was probably damaged: apparently it was not, because I could > burn my data onto it without problems; but when I tried to copy its content > into a hard disk I got I/O errors and some directories could not be copied. > > The problem disappeared when I changed the DVD with a brand new one, but now I > feel not sure: how can I know when my actual backup DVD should in case be > damaged as well? Is there any tool for that?
Many thanks to all that provided their help. Mostly I found easy to use Thomas' suggestion: "Thomas Hoppeer" <[EMAIL PROTECTED]> writes: > To verify data on your dvd you can also use star and readcd: > http://www.linuxconfig.org/Create_and_burn_ISO_images_with_mkisofs_%26_cdrecord#Verify_data . Now, `readcd' would produce I/O error messages with *all* DVDs, also the ones that I know for sure are all right. So, it was actually not useful at all. Instead, `star' seems to do the proper job: with Sarge I did: # apt-get install star , then mounted the disk, then cd into it and: $ star -cPM . >/dev/null . With the damaged disk, it produced an output like: star: Input/output error. Error reading 'rodolfo-30.giu.2007/mobile/opensync/libsyncml/tests/.svn/README.txt'. , then ended up with: star: 118167 blocks + 5120 bytes (total of 1210035200 bytes = 1181675.00k). star: The following problems occurred during archive processing: star: Cannot: stat 0, open 0, read/write 662. Size changed 0. star: Missing links 0, Name too long 0, File too big 0, Not dumped 0. star: Processed all possible files, despite earlier errors. . Instead, with the brand new DVD the output was: star: 119837 blocks + 9216 bytes (total of 1227140096 bytes = 1198379.00k). . So it seems that I can use this tool to verify disk integrity. I didn't try other people suggestions because this one was the simplest for me. Only one thing: the command `apt-get install star' does not work with Etch: it knows no package named `star'. Any suggestion about how to install star under Etch? Thanks indeed, Rodolfo -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
