Visit Our UNIX and Linux User Community

Full Discussion: Tar
Top Forums UNIX for Dummies Questions & Answers Tar Post 16967 by Jimbo on Saturday 9th of March 2002 09:35:22 AM
Old 03-09-2002
On my HP-UX 11.00, I can do:
mt -t /dev/rmt/0m status

With a tape mounted, I get:

Drive: HP C1537A
Format: DDS-3 format
Status: [41112500] BOT online compression immediate-report-mode
File: 0
Block: 0

With no tape, the Status line is:
Status: [0]

In both cases, $? is zero so I grep the Status line (and that is a tab after the colon, not a space):

Code:
mt -t /dev/rmt/0m status |
  grep '^Status:        \[0\]' > /dev/null ||
  echo 'tape mounted'

mt -t /dev/rmt/0m status |
  grep '^Status:        \[0\]' > /dev/null &&
  echo 'no tape mounted'

Jimbo
 
Test Your Knowledge in Computers #216
Difficulty: Easy
A network operating system is a specialized operating system for a social media company, like Facebook or Google.
True or False?

9 More Discussions You Might Find Interesting

1. 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

2. UNIX for Advanced & Expert Users

Tar utility (untar a .tar file) on VxWorks

Hi All Can someone pls guide me if there any utility to compress file on windows & uncompress on vxworks I tried as - - compressed some folders on windows ... i created .tar ( to maintain directory structure ) and compressed to .gz format. - on VxWorks i have uncompressed it to .tar... (1 Reply)
Discussion started by: uday_01
1 Replies

3. 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

4. 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

5. 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

6. 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

7. 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

8. AIX

Making Tar of directory and tar file is going to be placed

Quick question, is it possible to make a Tar of completely directory and placing the tar file in it (will this cause even the tar file to tarred ?) sample: /opt/freeware/bin/tar -cvf - /oracle | gzip > /oracle/backup.tgz will the tar file backup.tgz also include backup.tgz ? i tried... (5 Replies)
Discussion started by: filosophizer
5 Replies

9. 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
mt(1)								   User Commands							     mt(1)

NAME
mt - magnetic tape control SYNOPSIS
mt [-f tapename] command... [count] DESCRIPTION
The mt utility sends commands to a magnetic tape drive. If -f tapename is not specified, the environment variable TAPE is used. If TAPE does not exist, mt uses the device /dev/rmt/0n. OPTIONS
The following option is supported: -f tapename Specifies the raw tape device. OPERANDS
The following operands are supported: count The number of times that the requested operation is to be performed. By default, mt performs command once. Multiple opera- tions of command may be performed by specifying count. command Available commands that can be sent to a magnetic tape drive. Only as many characters as are required to uniquely identify a command need be specified. eof Writes count EOF marks at the current position on the tape. weof fsf Forward spaces over count EOF marks. The tape is positioned on the first block of the file. fsr Forward spaces count records. bsf Back spaces over count EOF marks. The tape is positioned on the beginning-of-tape side of the EOF mark. bsr Back spaces count records. nbsf Back spaces count files. The tape is positioned on the first block of the file. This is equivalent to count+1 bsf's followed by one fsf. asf Specifies absolute space to count file number. This is equivalent to a rewind followed by a fsf count. If count is specified with any of the following commands, the count is ignored and the command is performed only once. eom Spaces to the end of recorded media on the tape. This is useful for appending files onto previously written tapes. rewind Rewinds the tape. offline Rewinds the tape and, if appropriate, takes the drive unit off-line by unloading the tape. rewoffl status Prints status information about the tape unit. retension Rewinds the cartridge tape completely, then winds it forward to the end of the reel and back to beginning- of-tape to smooth out tape tension. reserve Allows the tape drive to remain reserved after closing the device. The drive must then be explicitly released. release Re-establishes the default behavior of releasing at close. forcereserve Breaks the reservation of the tape drive held by another host and then reserves the tape drive. This com- mand can be executed only with super-user privileges. erase Erases the entire tape. Caution: Some tape drives have option settings where only portions of the tape may be erased. Be sure to select the correct setting to erase the whole tape. Erasing a tape may take a long time depending on the device and/or tape. Refer to the device specific manual for time details. config Reads the drives current configuration from the driver and displays it in st.conf format. See st(7D) for definition of fields and there meanings. EXIT STATUS
0 All operations were successful. 1 Command was unrecognized or mt was unable to open the specified tape drive. 2 An operation failed. FILES
/dev/rmt/* magnetic tape interface ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
tar(1), tcopy(1), ar.h(3HEAD), environ(4), attributes(5), mtio( 7I), st(7D) BUGS
Not all devices support all options. Some options are hardware-dependent. Refer to the corresponding device manual page. mt is architecture sensitive. Heterogeneous operation (that is, SPARC to x86 or the reverse) is not supported. SunOS 5.10 1 Sep 2004 mt(1)

Featured Tech Videos

All times are GMT -4. The time now is 03:06 PM.
Unix & Linux Forums Content Copyright 1993-2020. All Rights Reserved.
Privacy Policy