Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Slow listing of LTo5 tape contents
Operating Systems AIX Slow listing of LTo5 tape contents Post 302806145 by bakunin on Sunday 12th of May 2013 02:59:59 PM
Old 05-12-2013
The problem is that "restore"/"backup" file format has no "table of contents", so basically "restore" has to read the whole file to generate it. The limiting factor is the speed of the tape (this is probably the case with the "backup" too).

What you can do is: instead of piping the file list directly into "backup" create a file first. Then write this file first at the rmt-device, only then use the same list as input to "backup". Write to the "/dev/rmtN.1" instead of "/dev/rmtN", this is the drive without "rewind on exit", so your "table of contents" will be the first entry on the cartridge. You can restore this single file to get/search a list of files backed up in this session.

Backup (schematic)
Code:
find .... -print > /tmp/filestobackup
tctl -f /dev/rmtN.1 rewind
tar cf /dev/rmtN.1 /tmp/filestobackup
backup -ivf /dev/rmtN.1 < /tmp/filestobackup
tctl -f /dev/rmtN rewoffl

Search (=restore toc only)
Code:
tar xf /dev/rmtN

Restore (schematic, skip first entry, then restore normally)
Code:
tctl fsf 1 -f /dev/rmtN.1
restore -lTf /dev/rmtN.1

I hope this helps.

bakunin
This User Gave Thanks to bakunin For This Post:
m_raheelahmed
 

10 More Discussions You Might Find Interesting

1. HP-UX

Listing the Ignite Backup tape

HI All I have created the bootable recovery tape using the ignite command make_tape_recovery, I need help for the command to list the content recorded in that tape. Regards, Gege:confused: (1 Reply)
Discussion started by: cgege
1 Replies

2. UNIX for Dummies Questions & Answers

Very slow Tar extraction from tape

I'm pulling a 1MB file from tape using tar. It's a 300GB DLT tape and it does have a lot of files on it because it's go the entire OS and Oracle RMAN files and 3000 table exports, but it's taking 2-3 hours to pull this file off of it. Is this type of performance what I should expect? The... (0 Replies)
Discussion started by: citrowske
0 Replies

3. UNIX for Dummies Questions & Answers

Listing contents

Hello guys, I am having a requirement, I am having three file m1,m2,m3 having some contents. I want to list last 20 lines of m1,m2 and m3 all together on the terminal. I used tail -20 m1 m2 m3, but it is showing error, tail: option used in invalid context -- 2 Can u help me... (2 Replies)
Discussion started by: mraghunandanan
2 Replies

4. Solaris

Listing Contents of tar.gz file

Hi fellows, Can you please share any command with which I can list down the file names inside a tar.gz file. I have tried with these possibilities but in vain. bash-3.00$ tar -ztvf file.tar.gz tar: z: unknown function modifier bash-3.00$ tar ztvf file.tar.gz tar: z: unknown function... (1 Reply)
Discussion started by: Zaib
1 Replies

5. 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 ....... (3 Replies)
Discussion started by: ppchu99
3 Replies

6. SCO

CPIO listing from tape question...

Hi. I have this old server onto which i needed to list the content of a tape. This is a SCO box (SCO_SV 3.2 5.0.6 i386) and backup was done using cpio. #tape status status : ready beginning-of-tape soft errors : 0 hard errors : 0 underruns : 0 #dtype /dev/rct0 /dev/rct0 ... (5 Replies)
Discussion started by: Stephan
5 Replies

7. Solaris

[SOLVED] How to initialize LTO5 Tape Drive?

Hi, We replaced one of our tape drives (attached to a SPARC Server) with an LTO5 one (external, attached vi SAS). Manually we check (using tar) that the OS can write data to the Tape Drive, however, the application backup is failing. Since the application takes its own backup, the apps team... (0 Replies)
Discussion started by: Mack1982
0 Replies

8. UNIX for Dummies Questions & Answers

Listing contents of .tar.gz files

Hi All, I would like to know couple of ways to list the content available in tar and gzipped file without extracting. i.e., I would like to display the contents of test.tar.gz without extracting. Note :: please suggest a command other that tar -ztvf (9 Replies)
Discussion started by: Girish19
9 Replies

9. Shell Programming and Scripting

Listing contents of fields

I am often given log files at work in .csv format to work with, normally extracting various fields. I then have to figure out the number of each field so that I can extract that field with cut or awk. Normally I just manually count the fields, based on the field separator. I would like to be... (3 Replies)
Discussion started by: stumpyuk99
3 Replies

10. Shell Programming and Scripting

Listing the contents of a file after a timestamp

Hi All I have a file which contains the timestamp of the log and a message and I want to implement a polling mechanism, where this log file is pooled every 2 minutes and list the errors in the file. I want to list down the errors only after the timestamp in the file is more than the current... (2 Replies)
Discussion started by: infyanurag
2 Replies

LEARN ABOUT DEBIAN

partclone.restore

partclone.restore(8)					      System Manager's Manual					      partclone.restore(8)

NAME

       partclone.restore - The utility to restore an etx2/ext3 partition.

SYNOPSIS

       partclone.restore [options]... [MODE] [SOURCE FILE] [OUTPUT FILE]

DESCRIPTION

       partclone.restore  is  a part of Partclone project.  Partclone is a project like the well-known backup utility "Partition Image" a.k.a par-
       timage. Partclone provide utilities to back up used blocks and design for higher compatibility of the file system using	supported  library
       like e2fslibs.

OPTIONS

       -o, --output FILE
	      Output FILE

       -O --overwrite FILE Output FILE, overwriting if exists
	      --restore_row_file create special raw file for loop device

       -s, --source FILE
	      Source FILE

       -L, --logfile FILE
	      Log FILE

       -dX, --debug=X
	      Set the debug level to X = [0|1|2]

       -C, --no_check
	      Don't check device size and free space

       -X, --dialog
	      Output message as Dialog Format

       -I, --ignore_fschk
	      Ignore filesystem check

       --ignore_crc
	      Ignore crc check error

       -F, --force
	      Force progress

       -f, --UI-fresh
	      Fresh times of progress

       -m, --max_block_cache
	      The used block will be cache until max number

       -q, --quiet
	      Disable progress message

       -v, --version
	      Display partclone version

       -h, --help
	      Display this help

Examples:
       restore /dev/hda1 from hda1.img and display debug information.

       partclone.restore -d -s hda1.img -o /dev/hda1

       restore image from clonezilla(split, gzip,) with stdin source

       cat sda1.ext3-ptcl-img.gz.a* > gunzip -c | partclone.restore -d -s - -o /dev/sda1

       restore raw image from partclone.dd

       partclone.dd -d -c -s /dev/sda1 -o - | partclone.restore -d -s - -o /dev/sdb1

REPORTING BUGS

       Report bugs to <thomas@nchc.org.tw>

SUPPORT

       You can get support at http://partclone.org

AUTHOR

       This manual page was written by Thomas Tsai <thomas@nchc.org.tw>

partclone 0.2.48						     Nov 2007						      partclone.restore(8)
All times are GMT -4. The time now is 03:57 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy