Very slow Tar extraction from tape

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Speed up extraction od tar.bz2 files using bash

The below bash will untar each tar.bz2 folder in the directory, then remove the tar.bz2. Each of the tar.bz2 folders ranges from 40-75GB and currently takes ~2 hours to extract. Is there a way to speed up the extraction process? I am using a xeon processor with 12 cores. Thank you :). ...

2. AIX

Slow listing of LTo5 tape contents

Hi, We are taking our filesystem backup having size of 1.3 TB on LTO5 catridges using the following command find * -print|backup -ivf '/dev/rmt0' '-U' i.e backup byname and it took about 6.5 Hours to complete When we are listing same tape contents using the following command restore...

3. Shell Programming and Scripting

Extraction of .tar.gz creates additional unwanted directories

I'm working on a project that requires me to compress then relocate directories to a different location based on their last date of modification. After running the script I check to see if it worked, and upon unzipping the tar.gz using I created everything that should be there is. I then performed...

4. AIX

mksysb to tape too slow...

had this p520 server connected to a DDS-3 4mm tape drive... running AIX 7.1 TL01 -- the latest release. mksysb -i -e /dev/rmt/1 ..tells me only 1% is done after over an hour ... I had no problems with th hardware and other connections... tar command to /dev/rmt/1 runs very fast .......

5. Emergency UNIX and Linux Support

extraction of directory and below using gnu tar

i need to restore everything in a certain directory and lower. I have a tgz archive of all of the files, and i need to restore everything in /user/home/xxxx/ and below. this is a users home directory. this is a dumb question and i know when i see the answer i am going to say DUH, but i am...

6. UNIX for Advanced & Expert Users

tar and gzip extraction issues

Not sure if this is really in the right forum but here goes.... Looking for a way to extract individual compressed files from a compressed tarball WITHOUT tar -zxvf and then recompressing. Basically we need to be able to chunk out an individual compressed file while it still remains...

7. AIX

Tar extraction error in aix 5.3

Hi root@appdr01 #ls -latr total 2887400 drwxr-xr-x 2 root system 256 May 06 11:34 lost+found drwxr-xr-x 34 root system 4096 May 06 11:34 .. drwxr-xr-x 3 root system 256 May 06 12:20 . -rw-r----- 1 root system 1478338560 May 06...

8. 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.

9. Shell Programming and Scripting

Help with tar extraction!

I have this tar file which has files of (.ksh, .ini &.sql) and their hard and soft links. Later when the original files and their directories are deleted (or rather lost as in a system crash), I have this tar file as the only source to restore all of them. In such a case when I do, tar...

10. UNIX for Advanced & Expert Users

extraction from a tape

Hi, I have a backup on tape which was done by tar by someone else. How can I extract it now ? I know tar -xf for the tar file on disk but for the tar file on a tape, how should I do ? Many thanks before. PS : uname -a AIX server12 5 00545FFA4C00

LEARN ABOUT BSD

mt

MT(1)							      General Commands Manual							     MT(1)

NAME

       mt - magnetic tape manipulating program

SYNOPSIS

       mt [ -f tapename ] command [ count ]

DESCRIPTION

       Mt  is  used  to  give commands to a magnetic tape drive.  If a tape name is not specified, the environment variable TAPE is used;  if TAPE
       does not exist, mt uses the device /dev/rmt12.  Note that tapename must reference a raw (not block) tape device.  By  default  mt  performs
       the requested operation once.  Operations may be performed multiple times by specifying count.

       The available commands are listed below.  Only as many characters as are required to uniquely identify a command need be specified.

       eof, weof
	      Write count end-of-file marks at the current position on the tape.

       fsf    Forward space count files.

       fsr    Forward space count records.

       bsf    Back space count files.

       bsr    Back space count records.

       rewind Rewind the tape (Count is ignored).

       offline, rewoffl
	      Rewind the tape and place the tape unit off-line (Count is ignored).

       status Print status information about the tape unit.

       cacheon
	      Enable the readahead/writebehind cache on the tape unit.

       cacheoff
	      Turn off the readahead/writebehind cache on the tape unit.

       Mt returns a 0 exit status when the operation(s) were successful, 1 if the command was unrecognized, and 2 if an operation failed.

       The cacheon and cacheoff commands currently only apply to the TMSCP driver and then only for certain drives such as the TU81+.  No error is
       produced by the TMSCP driver if the cache commands are used.  Other drivers will return an error code  since  they  do  not  recognize  the
       MTCACHE and MTNOCACHE functions codes.  See mtio(4).

FILES

       /dev/rmt* Raw magnetic tape interface

SEE ALSO

       mtio(4), tmscp(4), dd(1), ioctl(2), environ(7)

4th Berkeley Distribution					 December 22, 1995							     MT(1)

UNIX for Dummies Questions & Answers