Проблема с DUMP! Помогите пожалуйста!

При запуске dump -f /dev/nst0 /opt Такая ошибка: DUMP: Date of this level 0 dump: Mon Oct 20 14:14:38 2003 DUMP: Dumping /dev/sda5 (/opt) to /dev/nst0 DUMP: Added inode 8 to exclude list (journal inode) DUMP: Added inode 7 to exclude list (resize inode) DUMP: Label: none DUMP: mapping (Pass I) [regular files] DUMP: mapping (Pass II) [directories] DUMP: estimated 1443034 tape blocks. DUMP: Volume 1 started with block 1 at: Mon Oct 20 14:14:40 2003 DUMP: dumping (Pass III) [directories] DUMP: dumping (Pass IV) [regular files] DUMP: 17.50% done at 841 kB/s, finished in 0:23 DUMP: 35.62% done at 855 kB/s, finished in 0:18 DUMP: write error 746530 blocks into volume 1: Input/output error DUMP: fopen on /dev/tty fails: No such device or address DUMP: The ENTIRE dump is aborted. Связано ли это с активностью ФС или же еще что? Заранее спасибо....