From HPUX tar to Linux tar


 
Thread Tools Search this Thread
Special Forums Hardware Filesystems, Disks and Memory From HPUX tar to Linux tar
# 1  
Old 02-11-2002
Question From HPUX tar to Linux tar

Dear sirs,

I have some 4mm dat cartridges (4GB) made in a HP-UX 11.00 with a standard tar command (tar -cv files_to_backup) made with a scsi dat drive HP 35470A.

After more than one year I need to restore some data on a linux system (Red Hat 7.2) which has the same dat drive.

Now I tried to list the content of the cartridges but without any result.
In particular I used the following command:

$tar -tvf /dev/st0

After this command the lights on the tape driver blink and the tape run. But after 3-4 seconds everything stop and the prompt $ apper after the above command whithout any other message.
I tried also to use the following command

$tr -tvbf n /dev/st0

replacing n with different numbers (1-10-20-512)
but with the same result.
I tried all the above also as "su" and with other similar cartidges.

After the first blink and run of the tape driver if I repeat the command I get istantly the prompt symbol $ without any activity on the tape. To have a new activity (blink for some seconds) I have to extract and re-insert the tape.

Please, what I can do to list (and extract) my files from the catridges? What else can I try?
Thanks
# 2  
Old 02-12-2002
Something that comes immediately to my mind: find an HP-UX 11 machine just to be sure that you can read them on an HP machine itself. If not, then you possibly have a bad tape.

If they are readable on an HP, then it could be that you may need to refer to the tape drive as a different device.

Best Wishes!
# 3  
Old 02-13-2002
This question really needs one person who is an expert in both HP-UX and Linux. I can shed some light. By default, tar on HP-UX 11.0 will create a Posix style archive. Older versions of tar will not understand what a Posix style archive is.

There is a program that I have heard of, but never used, called "pax" that may also be able to read a Posix archive.
# 4  
Old 02-13-2002
Just something to consider. How large are the files you are trying to retsore? Many versions of Tar have problems when you go over 2GB for a aingle file. IRIX has portability issues with files over a certain size for instance.

Sorry - I'm not much help really.
# 5  
Old 02-14-2002
Linux has some ridiculously large max files size, in the hundreds of petabyte range, although I don't know what kernel / FS version that began with, so his system still may have the multi-gig limit.

It very well may be the issue of Posix tar vs. GNU tar, but I have tar'd files on a Linux machine, then ftp'd tem over to an HP-UX box, where they untarred just fine, and vice versa...

This may not be the *best* solution, but what about trying to dump the tape to a file? If you have some disk space, you could use dd, or even cat to dump it:
dd if=/dev/st0 of=/tmp/my_test.tar

If you can get data off of the tape, then it at least exists; if not, you may have a bad tape / drive. Hope this helps a little.
Login or Register to Ask a Question

Previous Thread | Next Thread

9 More Discussions You Might Find Interesting

1. HP-UX

Hpux find tar gzip

Hello, I will like to execute a find, tar & gzip in one command. find * -type f -mtime -$nb_days -print | xargs tar -cvf $MAITUT/BCK_DATA.tar gzip $MAITUT/BCK_DATA.tar.gz The fact that the TAR is very big, at the end I need to generate only a compress file. Please note... (22 Replies)
Discussion started by: royinfo.alain
22 Replies

2. AIX

Tar - pre-checking before making the Tar file

Coming from this thread, just wondering if there is an option to check if the Tar of the files/directory will be without any file-errors without actually making the tar. Scenario: Let's say you have a directory of 20GB, but you don't have the space to make Tar file at the moment, and you want... (14 Replies)
Discussion started by: filosophizer
14 Replies

3. Linux

How to install *.pkg.tar.tar on Linux?

Hi Guys, I need some suggestion as how to install openssl-1.0.1.g-1-i686.pkg.tar.tar openssl-1.0.1.g-1-x86_64.pkg.tar.tar on Linux system? is for 32bit system and other is for 64 bit system linux machine. How to untar them? I tried few commands but did not work. I need to upgrade to... (5 Replies)
Discussion started by: manalisharmabe
5 Replies

4. UNIX for Dummies Questions & Answers

Do I need to extract the entire tar file to confirm the tar folder is fine?

I would like to confirm my file.tar is been tar-ed correctly before I remove them. But I have very limited disc space to untar it. Can I just do the listing instead of actual extract it? Can I say confirm folder integrity if the listing is sucessful without problem? tar tvf file1.tar ... (1 Reply)
Discussion started by: vivien_chu
1 Replies

5. Shell Programming and Scripting

tar command to explore multiple layers of tar and tar.gz files

Hi all, I have a tar file and inside that tar file is a folder with additional tar.gz files. What I want to do is look inside the first tar file and then find the second tar file I'm looking for, look inside that tar.gz file to find a certain directory. I'm encountering issues by trying to... (1 Reply)
Discussion started by: bashnewbee
1 Replies

6. Shell Programming and Scripting

tar command dont tar to original directory

HI, if I have a tarfile called pmapdata.tar that contains tar -tvf pmapdata.tar -rw-r--r-- 0/0 21 Oct 15 11:00 2009 /var/tmp/pmapdata/pmap4628.txt -rw-r--r-- 0/0 21 Oct 14 20:00 2009 /var/tmp/pmapdata/pmap23752.txt -rw-r--r-- 0/0 1625 Oct 13 20:00 2009... (1 Reply)
Discussion started by: borderblaster
1 Replies

7. UNIX for Dummies Questions & Answers

tar -cvf test.tar `find . -mtime -1 -type f` only tar 1 file

Hi all, 4 files are returned when i issue 'find . -mtime -1 -type f -ls'. ./ora_475244.aud ./ora_671958.aud ./ora_934052.aud ./ora_934050.aud However, when I issued the below command: tar -cvf test.tar `find . -mtime -1 -type f`, the tar file only contains the 1st file -... (2 Replies)
Discussion started by: ahSher
2 Replies

8. UNIX for Advanced & Expert Users

How to create a Tar of multiple Files in Unix and FTP the tar to Windows.

Hi, On my Unix Server in my directory, I have 70 files distributed in the following directories (which have several other files too). These files include C Source Files, Shell Script Source Files, Binary Files, Object Files. a) /usr/users/oracle/bin b) /usr/users/oracle... (1 Reply)
Discussion started by: marconi
1 Replies

9. UNIX for Advanced & Expert Users

Does tar do crc checking on a tape or tar file?

Trying to answer a question about whether tar table-of-contents is a good tool for verifying tape data. (1 Reply)
Discussion started by: tjlst15
1 Replies
Login or Register to Ask a Question

Featured Tech Videos