amrestore is the older, less interactive utility for file recovery that is best suited to recovering a whole filesystem, and in any case is required if the recover program needed by amrecover is not available on the backup server (eg for solaris clients).
Here is n annotated typescript showing the use of amrecover.
Script started on Thu May 30 16:52:43 2002 [root@bilsdale tmp]# ssh pontop "df -k /export/www.people" root@pontop's password: Filesystem kbytes used avail capacity Mounted on /dev/dsk/c0t2d0s1 1651541 1264948 221439 86% /export/www.people
[root@bilsdale tmp]# su - operator # run this as operator sh-2.04$ amadmin ncl find pontop c0t2d0s1 Scanning /var/spool/amanda2... lost+found: skipping cruft directory, perhaps you should delete it. Scanning /var/spool/amanda... lost+found: skipping cruft directory, perhaps you should delete it. ncrr: skipping cruft directory, perhaps you should delete it. date host disk lv tape or file file status .... 2002-05-21 pontop c0t2d0s1 0 byerhope37 80 OK 2002-05-22 pontop c0t2d0s1 1 byerhope38 33 OK .... sh-2.04$ logout # back to root user
To be on the safe side, take the current tape offline and force it back into its slot in the autoloader, then load the required tape with amtape:-
[root@bilsdale tmp]# su - operator # run this as operator sh-2.04$ mt -f /dev/nst0 rewoffl /dev/nst0: Input/output error sh-2.04$ mtx -f /dev/sg2 unload Unloading Data Transfer Element into Storage Element 7...done sh-2.04$ amtape ncl slot 7 amtape: changed to slot 7 on /dev/nst0 sh-2.04$ logout # back to root user
/var/spool/amanda
is a good choice) and restore the backup image.:-
[root@bilsdale amanda]# PATH=/usr/local/amanda/current/sbin:$PATH [root@bilsdale amanda]# export PATH [root@bilsdale amanda]# amrestore /dev/nst0 pontop c0t2d0s1 amrestore: 0: skipping start of tape: date 20020412 label byerhope10 ... amrestore: 75: restoring pontop.c0t2d0s1.20020412.0 ... amrestore: 91: reached end of tape: date 20020412
For large filesystems, it may be nessary to use the split command as well:-
amrestore -p /dev/nst0 pontop c0t2d0s1 | split --bytes=2000m - pontop.c0t2d0s1.
[root@bilsdale amanda]# /sbin/restore ifv pontop.c0t2d0s1.20020412.0
Verify tape and initialize maps
Tape block size is 32
Note: Doing Byte swapping
Dump date: Sat Apr 13 00:25:33 2002
Dumped from: the epoch
Level 0 dump of /export/www.people on pontop:/dev/dsk/c0t2d0s1
Label: none
Note: Doing Quad swapping
Extract directories from tape
Initialize symbol table.
/sbin/restore > ls
...
233553 a.user/ 495937 another.user/
...
/sbin/restore > cd a.user
/sbin/restore > ls
./c.r.ritson:
233553 ./ 250632 cgi-bin/ 484162 home.informal/
2 ../ 478466 home.formal/ 233542 index.html
233546 .AppleDouble/ 233567 home.info 233684 index.html-
478489 MOMexcludes 233807 home.info-
/sbin/restore > add home.formal
Make node ./a.user
Make node ./a.user/home.formal
...
/sbin/restore > extract
Extract requested files
You have not read any tapes yet.
Unless you know which volume your file(s) are on you should start
with the last volume and work towards the first.
Specify next volume #: 1
...
extract file ./a.user/home.formal/index.html
...
Add links
Set directory mode, owner, and times.
set owner/mode for '.'? [yn] n
/sbin/restore > quit
[root@bilsdale amanda]# su - operator sh-2.04$ amcheck -s ncl Amanda Tape Server Host Check ----------------------------- Holding disk /var/spool/amanda2: 6971800 KB disk space available, using 6255000 KB Holding disk /var/spool/amanda: 32030448 KB disk space available, using 28884720 KB amcheck-server: slot 7: date 20020412 label byerhope10 (active tape) amcheck-server: slot 1: date 20020404 label byerhope04 (exact label match) NOTE: skipping tape-writable test Tape byerhope04 label ok Server check took 170.367 seconds (brought to you by Amanda 2.4.2p2) sh-2.04$ logout [root@bilsdale amanda]# Script done on Thu May 30 17:45:22 2002