DDS3 not backing up full amount
Dan Nelson
dnelson at allantgroup.com
Thu Apr 10 17:54:03 PDT 2003
In the last episode (Apr 10), Brandon Hagedorn said:
> Have a question about dds3 tape drives... I have a SONY SDT-9000 and
> when I use this command "tar c backup/ --totals" I get this message when
> the backup contains around 11.4 GB of files, here is the message
> "Total Bytes written 10612029440 (9.9GB, 994Kb/s) tar:/dev/sa0: Wrote
> only 0 of 10240 bytes tar: error is not recoverable: exiting now"
>
> Was wondering why it's only going to 9.9 GB when the tapes are 12/24GB?
> I've tried 4 different (new) tapes and tried backing up 40GB of data (
> which I knew it wouldn't backup the whole thing). The same thing
> happens, stops at the 9.9GB point.
Try using a larger blocksize. Tar defaults to 10k which is pretty
small. Try 64k (the max FreeBSD can do): "tar cb 128 backup/
--totals"
--
Dan Nelson
dnelson at allantgroup.com
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