Re: Recovering tapeless amanda server
On Web, 14 Jul 2004 at 13:47 Joshua Baker-LePain wrote: > Nope -- I've just never used virtual tapes. ;) That's what I get for > giving advice on an aspect of amanda I've never used... The advice was good. Thanks very much. (Although I admit I scratched my head a for a couple of minutes before I realised that the .0 file created by "amrestore" was more suitable for "tar" than the "restore" suggested by docs/RESTORE. My configuration, mea culpa.) Thanks again for the help. Best regards, Ralph.
Re: Recovering tapeless amanda server
On Wed, 14 Jul 2004 at 10:57am, Paul Bijnens wrote > Joshua Baker-LePain wrote: > > Come to think of it, though, I don't know a priori how to get to the > > second image in one of those files (you could do it with counting blocks). > > Your easiest path is probably just to get amanda installed on the rebuilt > > server and use amrestore on those tape files. amrestore doesn't need > > indices. > > Second image in one file? The format the the virtual tapes is actually > quite easy. Each image on tape is one file on disk (+ some other files > to store typical tape parameters, like blocksize etc.). Even the name of > that file contains hostname and DLE. > > Or did I miss something? Nope -- I've just never used virtual tapes. ;) That's what I get for giving advice on an aspect of amanda I've never used... -- Joshua Baker-LePain Department of Biomedical Engineering Duke University
Re: Recovering tapeless amanda server
Joshua Baker-LePain wrote: On Tue, 13 Jul 2004 at 7:43pm, Ralph at yahoogroups wrote We've just had a disk crash on our Amanda 2.4.3 server on RedHat 7.3 Linux. I had it configured to do tapeless backups onto a different fileserver (via chg-multi (I think) and the file tapetype. However, I was shortsighted enough to backup the Amanda config files with Amanda herself. So, now I am left with a load of "tape" files but don't know how to get at their contents. Can someone, please, point me in the right direction? docs/RESTORE will still cover this I believe. Just treat the "tape" files as if they were tapes. 'dd if=tapefile of=header.out bs=32k count=1' will read the header of the first image in 'tapefile'... Come to think of it, though, I don't know a priori how to get to the second image in one of those files (you could do it with counting blocks). Your easiest path is probably just to get amanda installed on the rebuilt server and use amrestore on those tape files. amrestore doesn't need indices. Second image in one file? The format the the virtual tapes is actually quite easy. Each image on tape is one file on disk (+ some other files to store typical tape parameters, like blocksize etc.). Even the name of that file contains hostname and DLE. Or did I miss something? I would do something like: 1. boot from CD, partition the disks, and format them appropriate (You could use the opportunity to install a newer version too.) A knoppix CD is very handy in this case; you have lots of tools available, including the network and utilities like netcat. Then mount the new partition(s) somewhere, e.g. mount /dev/hda1 /mnt mkdir /mnt/home mount /dev/hda2 /mnt/home 2. Assuming you have netcat available this is very quick: First on the crashed host: nc -l -p 1234 | gtar -zpxvf - Second on the fileserver that has the backup images: dd if=5.crashhost._.0 bs=32k skip=1 | nc -w 1 crashhost 1234 (fill in the real number.host._Disk_List_Entry.level, maybe omit -z flag if backup was not compressed) Repeat for each backup level. Do this for the other partitions as well. If you don't have nc, then you'll need to set up some network pipes using rsh or ssh (fighting against all kinds of authentication problems, which I usually hate in these circumstances.) If you do have "amrestore" installed on that fileserver, you can replace the dd with: ammt -f file:/your/virtual/tape rewind amrestore -p file:/your/virtual/tape | nc -w 1 crashhost 1234 3. If you use lilo as boot loader, execute chroot /mnt lilo For grub, I've not yet had the opportunity to test this out :-) If anyone has this knowledge online, let me know. -- Paul Bijnens, XplanationTel +32 16 397.511 Technologielaan 21 bus 2, B-3001 Leuven, BELGIUMFax +32 16 397.512 http://www.xplanation.com/ email: [EMAIL PROTECTED] *** * I think I've got the hang of it now: exit, ^D, ^C, ^\, ^Z, ^Q, F6, * * quit, ZZ, :q, :q!, M-Z, ^X^C, logoff, logout, close, bye, /bye, * * stop, end, F3, ~., ^]c, +++ ATH, disconnect, halt, abort, hangup, * * PF4, F20, ^X^X, :D::D, KJOB, F14-f-e, F8-e, kill -1 $$, shutdown, * * kill -9 1, Alt-F4, Ctrl-Alt-Del, AltGr-NumLock, Stop-A, ...* * ... "Are you sure?" ... YES ... Phew ... I'm out * ***
Re: Recovering tapeless amanda server
Hi Ralph! Ralph at yahoogroups wrote: > So, now I am left with a load of "tape" files but don't know how to get > at their contents. You could have a look at http://www.backupcentral.com/amanda-24.html Ciao, Simon -- Simon Frettloeh Institute AIFB (Applied Computer Science and Formal Description Methods) University of Karlsruhe Engler Str. 11 - 76128 Karlsruhe - Germany
Re: Recovering tapeless amanda server
On Tue, 13 Jul 2004 at 7:43pm, Ralph at yahoogroups wrote > We've just had a disk crash on our Amanda 2.4.3 server on RedHat 7.3 > Linux. I had it configured to do tapeless backups onto a different > fileserver (via chg-multi (I think) and the file tapetype. However, I was > shortsighted enough to backup the Amanda config files with Amanda herself. > So, now I am left with a load of "tape" files but don't know how to get > at their contents. > > Can someone, please, point me in the right direction? docs/RESTORE will still cover this I believe. Just treat the "tape" files as if they were tapes. 'dd if=tapefile of=header.out bs=32k count=1' will read the header of the first image in 'tapefile'... Come to think of it, though, I don't know a priori how to get to the second image in one of those files (you could do it with counting blocks). Your easiest path is probably just to get amanda installed on the rebuilt server and use amrestore on those tape files. amrestore doesn't need indices. Good luck. -- Joshua Baker-LePain Department of Biomedical Engineering Duke University
Recovering tapeless amanda server
We've just had a disk crash on our Amanda 2.4.3 server on RedHat 7.3 Linux. I had it configured to do tapeless backups onto a different fileserver (via chg-multi (I think) and the file tapetype. However, I was shortsighted enough to backup the Amanda config files with Amanda herself. So, now I am left with a load of "tape" files but don't know how to get at their contents. Can someone, please, point me in the right direction? Best regards, Ralph. http://people.web.psi.ch/bearpark
