Naeem Shah wrote: >Randy, > >Thank you very much for being with me in my tape drive problem. > >Currently I am running a backup of file system which is almost 30gb with tar >command. The command syntax I have used to start the backup is: > ># tar -cvMf /dev/tape . >where 'M' is to support multiple archives. I am wondering now that almost 15 >gb (while the total capacity of the cartridge is 8gb in comressed mode, 4gb >in normal) data is backuped up and it neither stopped nor asked for another >tape cartridge. I dont why is this behaviour going on. Perhaps, it is >finishing the tape and assuming the same tape as the next available >cartridge and that's why it is not stopping. >
>The -M option, as I understand it, is used for backing up to disk. It is a way of >getting around the 2GB file limit for tar. It is normally not needed for tape backup. > > > > >>Yes, Randy, -L options also worked after some difficulties in uderstanding >>its concept. >> >>But still I have some confusions: >> >>1. My tape drive is DDS-3 and support upto 24 GB in comressed mode(normal >> >> >is > > >>12gb). But I am using a DDS-2 tape cartridge which support upto 8 GB in >>compress and 4 GB in normal mode. Now, if I use -L option what the size I >>should give with -L. I tried values for -L assuming tape length as 2 and 4 >>gb and both worked. But I dont know whether I will be able to get full 8gb >>data capacity of my cartridge. (i can test it anyway, but your advise is >>still valueable for me). >> >> The compression amount (in your case 8GB) must be done through software compression, using an application that supports compression on your drive. >>>Naeem Shah wrote: >>> >>> >>> >>>>Hello Randy, >>>> >>>>I finished a test backup which needed more than one tape but >>>> >>>> >>unfortunately >> >> >>>>tar exited with an error and did not ask for a second tape to insert in >>>>order to continue the backup till its completion. >>>> >>>>The error message is similare to: >>>> >>>>tar: /dev/tape: wrote only 0 of 1024 bytes >>>>tar: Error is not recoverable: exiting now >>>> >>>> >>>> This is the same thing I got when it got to the end of tape. I have tried the -L option to tar, and can't get it to work correctly. There is a free backup program called arkeia (http://www.arkeia.com/) which is difficult to set up, but works great. There is also BRU (http://www.bru.com/), which will do what you want, but it is commercial software, and you will have to buy it. _______________________________________________ Seawolf-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/seawolf-list
