danny@idacom.uucp (Danny Wilson) (01/18/90)
> lampi@pnet02.gryphon.com (Michael Lampi) writes in <24648@gryphon.COM> : > [...] > If you like tar for backups there is no reason it can not be used for such. > There is a big problem with tar for doing backups if your backup spans multiple tapes. This is not a particular problem with Apollo, just tar in general. This means that, for example, you want to backup a 10 Meg directory and only have 5 Meg tape, tar will only backup half the directory! It does not prompt for a second tape and will not inform you that data was not recorded. -- Danny Wilson danny@idacom.uucp IDACOM Electronics alberta!idacom!danny Edmonton, Alberta X.400 danny@idacom.cs.ubc.cdn C A N A D A Voice +1 403 462 4545
tim@gvlf9-e.gvl.unisys.com (Timothy Scharping) (01/18/90)
In article <1990Jan17.185931.21912@idacom.uucp> danny@idacom.uucp (Danny Wilson) writes: > >There is a big problem with tar for doing backups if your backup >spans multiple tapes. This is not a particular problem with Apollo, >just tar in general. > >This means that, for example, you want to backup a 10 Meg directory >and only have 5 Meg tape, tar will only backup half the directory! > >It does not prompt for a second tape and will not inform you that >data was not recorded. > I have also encountered another problem with using tar for complete system backups. There seem to be several files which tar isn't able to read (i.e. `node_data/system_logs/sys_error_log). When tar is comes accross a file that can't be opened it chokes causing it to hang on our DN3550. --tim ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Timothy Scharping Internet: tim@GVL.Unisys.COM Unisys Corporation UUCP: ...!uunet!lgnp1!gvlv2!tim Paoli, PA 19301 ...!{gatech,purdue}!psuvax1!burdvax!gvlv2!tim
lampi@pnet02.gryphon.com (Michael Lampi) (01/19/90)
danny@idacom.uucp (Danny Wilson) writes: > > >> lampi@pnet02.gryphon.com (Michael Lampi) writes in <24648@gryphon.COM> : >> [...] >> If you like tar for backups there is no reason it can not be used for such. >> > >There is a big problem with tar for doing backups if your backup >spans multiple tapes. This is not a particular problem with Apollo, >just tar in general. > >This means that, for example, you want to backup a 10 Meg directory >and only have 5 Meg tape, tar will only backup half the directory! > >It does not prompt for a second tape and will not inform you that >data was not recorded. > >-- >Danny Wilson danny@idacom.uucp >IDACOM Electronics alberta!idacom!danny >Edmonton, Alberta X.400 danny@idacom.cs.ubc.cdn >C A N A D A Voice +1 403 462 4545 But if you want to use tar for backups, go right ahead! (I didn't say you HAD to use tar -- just like I wouldn't say you should use floppies, either. It all depends on what you're trying to do and what you are comfortable with. :-) ) Personally, I use cpt to floppies for small stuff, and wbak to 1/2 inch magtape for full backups. Michael Lampi MDL Corporation 213/782-7888 fax 213/782-7927 UUCP: {ames!elroy, <routing site>}!gryphon!pnet02!lampi INET: lampi@pnet02.gryphon.com "My opinions are that of my corporation!"