7SUN-solaris-备份与恢复.pptVIP

* Level 1-9 备份那些在上一次lower备份后的修改 Incremental 备份依赖 /etc/dumpdates 文件中保存的信息。 # cat /etc/dumpdates /dev/rdsk/c0t2d0s6 0 Tue Dec 8 11:12:27 1995 /dev/rdsk/c0t2d0s0 3 Thu Dec 10 17:44:02 1995 /dev/rdsk/c0t2d0s4 0 Thu Dec 10 16:42:21 1995 /dev/rdsk/c0t2d0s3 5 Thu Dec 10 17:20:20 1995 /dev/rdsk/c0t2d0s6 2 Thu Dec 10 11:12:27 1995 * 每月一次全备份； 每周星期五执行从上一次全备份来的增量备份； 每周还执行level 3、4、5和6级增量备份。 * i Perform an interactive restore. r Restore the entire backup. t List the table of contents of the backup. x Restore only the files named on the command line. f dump_file Specify a specific dump_file instead of the default /dev/rmt/0 as the file to restore from. Typically, the dump_file option specifies a tape or diskette drive, but it may be a disk file. v Display path names as they are being restored (verbose mode). Note that this is different from the v (verify) option used with the ufsdump command. * 恢复整个文件系统 1. 备份卸下文件系统。 # fsck /opt # ufsdump 0cuf /dev/rmt/0 /opt 2. 重分区，建立文件系统，安装在一个临时目录上恢复数据。 # newfs /dev/rdsk/c0t3d0s5 # fsck /dev/rdsk/c0t3d0s5 # mount /dev/rdsk/c0t3d0s5 /mnt # cd /mnt # ufsrestore rvf /dev/rmt/0 # rm restoresymtable 3. 卸下文件系统，做文件系统检查 # cd / # umount /mnt # fsck /dev/rdsk/c0t3d0s5 * status 显示tape driver的状态信息； rewind Rewinds the tape. Retension 将整个磁带先forward到尾，再rewind到头，这样可以smooth out磁带的张力。 erase Erases the entire tape. fsf Forward skips count tape files.(跳过count指定的磁带文件) bsf Backward skips count tape files. (回跳过count指定的磁带文件) nbsf Backward skips count tape files. The tape is positioned on the first block of the file. This is equivalent to count+1 bsf followed by one fsf. (回跳过count+1指定的磁带文件) eom Skips to the end of the recorded media. * # tar cvf /dev/rmt/0n solaris a solaris/ 0 tape blocks a solaris/testing.txt 3 tape blocks 不rewind磁带备份solaris； # tar cvf /dev/rmt/0n jini a jini/ 0 tape blocks a jini/alhadef.txt 6 tape blocks 不rewind磁带备份jini； # tar cvf /dev/rmt/0 java a java/ 0 tape blocks a java/test.class 2 tape blocks a java/research.class 2 tape