2008/9/11 Miner, Jonathan W (US SSA) <jonathan.w.miner@xxxxxxxxxxxxxx> > You need to specify the "no rewind" device... /dev/nst0 > > You will need to seek to the end of the tape before writing new data to the > tape. Look at the "st" and "mt" man pages. > > I don't know any way to know how much free space is on a tape; it's > complicated due to compression since you don't really care how much tape is > left, but how much data will fit on that tape.... which depends on how well > the data will compress. > > > -----Original Message----- > From: redhat-list-bounces@xxxxxxxxxx on behalf of ammad shah > Sent: Thu 9/11/2008 4:23 PM > To: redhat-list@xxxxxxxxxx > Cc: > Subject: tape > > Dear all, > > i am trying to backup on tape drive (lto3), but when i save it , it always > overwrite on previous files. even though i am writing every time a new file. > > #tar -cvf /dev/st0 backup-01-09.tar.gz > #tar -tvf /dev/st0 > backup-01-09.tar.gz > #tar -czvf /dev/st0 backup-02-09.tar.gz > #tar -tvf /dev/st0 > backup-02-09.tar.gz > > Why ? > > and how do i know space left on tape drive before backup. i am using > single cartridge IBM LTO 3 tape drive. > > thanks. > _________________________________________________________________ > Get more out of the Web. Learn 10 hidden secrets of Windows Live. > > http://windowslive.com/connect/post/jamiethomson.spaces.live.com-Blog-cns!550F681DAD532637!5295.entry?ocid=TXT_TAGLM_WL_domore_092008--<http://windowslive.com/connect/post/jamiethomson.spaces.live.com-Blog-cns%21550F681DAD532637%215295.entry?ocid=TXT_TAGLM_WL_domore_092008--> > redhat-list mailing list > unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=subscribe > https://www.redhat.com/mailman/listinfo/redhat-list > > > > > -- > redhat-list mailing list > unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe > https://www.redhat.com/mailman/listinfo/redhat-list > there is no way to know how much space is left on the tape. we break the tape backup into volume (1 tape == 1 volume). we figure out which filesystems go to which volume based on the size of the filesystems and adjust as needed. this has worked out very well for us. and easy! -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
