unix and linux commands - unix shell scripting

Protecting Your Archival Data With Improved Tape Dimensional Stability

Login or Register for Dates, Times and to Reply

Thread Tools Search this Thread
# 1  
Protecting Your Archival Data With Improved Tape Dimensional Stability

This paper provides insight into the factors that make for longer lasting tape its dimensional stability.Some of these are environmental, but the substrate used is very important; advances in tape substrates have resulted in significant improvements over the last decade.

Login or Register for Dates, Times and to Reply

Previous Thread | Next Thread
Thread Tools Search this Thread
Search this Thread:
Advanced Search

Test Your Knowledge in Computers #476
Difficulty: Medium
A Zettabyte (ZB) is 1,180,591,620,717,411,303,424 bytes.
True or False?

7 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

[Solved] Help -file archival

Hi All, I have a scenario to append all the CSV files with date while moving from one directory to another directory . e.g. Source DIR - A files (can be more files, not sure about file names , but csv format ) a.csv, bc.csv, el.csv,... Target Dir - B I want my file names as ... (16 Replies)
Discussion started by: AspiringD
16 Replies

2. Shell Programming and Scripting

small error in shellscripting -archival part

Hi All, I have run the below script but getting one small error. please help me to solve this. ERROR: tar: Error exit delayed from previous errors CODE: #! /bin/bash CEP=/home/user01/exercise/CEP ARCH=/home/user01/exercise/archive LOG=/home/user01/exercise/logs... (3 Replies)
Discussion started by: aish11
3 Replies

3. Shell Programming and Scripting

Manipulating Pick multi dimensional data with awk.

Hi. I am reasonably new to awk, but have done quite a lot of unix scripting in the past. I have resolved the issues below with unix scripting but it runs like a dog. Moved to awk for speed and functionality but running up a big learning curve in a hurry, so hope there is some help here. I... (6 Replies)
Discussion started by: mike.strategis
6 Replies

4. UNIX for Dummies Questions & Answers

Need help with DDS data tape

Hi all I have BIG headache with an old unix server I have and I need some help and ideas how to solve them effectively. Thanks in advance ***Story*** I have an OLD SCO OpenServer 5 release 5 server with DDS4 tape device. I also have a box full of DDS4 tapes with data inside. I... (3 Replies)
Discussion started by: khaos83_2000
3 Replies

5. UNIX for Dummies Questions & Answers

Backup Data to tape

Hi everyone!!! I have a question on incremental backup`s and full backup`s? We currently use the Round-Robin schema to do full backup`s on a daily basis but want to change that as our data is increasing. I would like to imply the Grandfather-father-Son policy taking a full backup on the 1st of... (1 Reply)
Discussion started by: donovan
1 Replies

6. UNIX for Dummies Questions & Answers

ftp stability check

Hi, Can anybody tell me that how I can check for my ftp stability in my system for past few weeks?? Thanks. (2 Replies)
Discussion started by: efang
2 Replies

7. UNIX for Dummies Questions & Answers

Archival Tool for UNIX

Hi All, Need to get the information if there is any tool on Unix for Archiving and retrival of documents automatically. Having the capbalilty to integrate with other systems. And provide the APIs which can be called from other Systems to facilitate automatic Archival and Retrieval. Thanks &... (7 Replies)
Discussion started by: sanjeev0915
7 Replies
FMS(8)							       AFS Command Reference							    FMS(8)

fms - Determine a tape's capacity and a tape device's filemark size SYNOPSIS
fms -tape <tape special file> [-help] fms -t <tape special file> [-h] DESCRIPTION
The fms command determines the capacity of the tape currently in the tape device identified by the -tape argument, along with the size of the filemark for the device. The filemark is also referred to as the device's end-of-file (EOF) marker, and can differ for each combination of tape and tape device. As the Tape Coordinator writes a dump, it writes a filemark between the data included from each volume and also tracks the amount of space left before the end of the tape (EOT). For some tape devices, the filemark is large enough (multiple megabytes) that failure to consider it leads the Tape Coordinator significantly to overestimate the available space. The intended use of this command is to determine tape capacity and filemark size values that can be specified in a tape device's entry in the /var/lib/openafs/backup/tapeconfig file. For certain types of tape drives, the Tape Coordinator operates more efficiently when the tapeconfig file lists accurate values. For further discussion, see the OpenAFS Administration Guide chapter on configuring the Backup System. Insert a tape in the drive before issuing this command. CAUTIONS
Do not use this command on compressing tape devices in compression mode or with tape devices that handle tapes of multigigabyte (or multiterabyte) capacity. It does not produce accurate results in those cases. For alternate suggestions on the values to record in the tapeconfig file for compressing drives, see the OpenAFS Administration Guide chapter on configuring the Backup System. Running the command completely overwrites the tape, so use a blank one or one that can be recycled. Because it writes filemarks to the complete length of the tape, the command can take from several hours to more than a day to complete. OPTIONS
-tape <tape special file> Specifies the UNIX device name of the tape device for which to determine filemark size and the capacity of the tape it currently contains. The format varies on different system types, but usually begins with /dev; an example is /dev/sd0a. -help Prints the online help for this command. All other valid options are ignored. OUTPUT
The command generates output both on the standard output stream and in the fms.log file that it creates in the current working directory. The output reports the capacity of the tape in the device and the device's filemark size. The first few lines of output include status information about the execution of the command, including such information as the number of blocks and the number of file marks written to the tape by the command. The last two lines of both screen and file output provide the following information: o "Tape capacity is number bytes": specifies the size, in bytes, of the tape in the device. o "File marks are number bytes": specifies the device's filemark size in bytes. The following message indicates that the fms command interpreter cannot access the tape device. The command halts. Can't open tape drive I<device> The following message indicates that the command interpreter cannot create the fms.log log file. Again, the command halts. Can't open log file EXAMPLES
The following command illustrates the output for the device called /dev/rmt1h: % fms /dev/rmt1h wrote block: 130408 Finished data capacity test - rewinding wrote 1109 blocks, 1109 file marks Finished file mark test Tape capacity is 2136604672 bytes File marks are 1910205 bytes The following appears in the fms.log file: fms test started wrote 9230 blocks Finished file mark test Tape capacity is 151224320 bytes File marks are 2375680 bytes PRIVILEGE REQUIRED
The issuer must be able to insert and write to files in the currently working directory, if the fms.log file does not already exist. If it already exists, the issuer need only be able to write to it. SEE ALSO
fms.log(5), tapeconfig(5) COPYRIGHT
IBM Corporation 2000. <http://www.ibm.com/> All Rights Reserved. This documentation is covered by the IBM Public License Version 1.0. It was converted from HTML to POD by software written by Chas Williams and Russ Allbery, based on work by Alf Wachsmann and Elizabeth Cassell. OpenAFS 2012-03-26 FMS(8)