Sponsored Content
Top Forums UNIX for Advanced & Expert Users Command to output ones (like zero-fill), with progress indicator Post 302449761 by Gliktch on Tuesday 31st of August 2010 12:08:39 PM
Old 08-31-2010
Lightbulb Command to output ones (like zero-fill), with progress indicator

Well, I was originally going to post this snippet in the original thread titled "how to output ones endlessly like /dev/zero", but that topic was closed without an efficient answer.

It was difficult to find (build) a satisfactory answer to this one, so I thought I'd share it here and as a "fill hard drive with ones like zero-fill" entry on commandlinefu.

This command seems to get me about 500MByte/min, though this is with a 1.5TB 'green' drive running only at 5400rpm so I imagine it'd be faster in most other cases.
Code:
tr '\000' '\377' < /dev/zero | dd bs=512 count=[drive bytes/512] status=noxfer | pipebench | sudo dd of=[output disk/partition, e.g. /dev/sdb]

Hope that helps someone Smilie
- Gliktch

P.S: Note that pipebench is required - this is probably available in your distro's repositories Smilie
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Korn: How to zero fill df output so it will sort properly

I'm looking for a way in Korn shell to zero fill (or space fill) the output from df so that it will sort properly. "Raw" output from df -k: df -k Filesystem kbytes used avail capacity Mounted on /dev/vx/dsk/rootvol 4131866 3593302 497246 88% / /proc ... (9 Replies)
Discussion started by: shew01
9 Replies

2. Shell Programming and Scripting

Progress indicator script

Can anybody suggest you a good script to show progress of a process. I figured it out some thing like this. But cursor goes to the end of the line and after every loop it goes to the next line. while true ; do for i in \| \/ \- \\ \| \/ \- \\ do echo "\b\b$i \c" sleep 1 done done (8 Replies)
Discussion started by: ./hari.sh
8 Replies

3. UNIX for Dummies Questions & Answers

Command display output on console and simultaneously save the command and its output

Hi folks, Please advise which command/command line shall I run; 1) to display the command and its output on console 2) simultaneous to save the command and its output on a file I tried tee command as follows; $ ps aux | grep mysql | tee /path/to/output.txt It displayed the... (7 Replies)
Discussion started by: satimis
7 Replies

4. Shell Programming and Scripting

Process indicator with hash marks

Hi Experts, I have written a php script that calls several smaller bash shell scripts throughout it's loop process. Users run this script to achieve a task that this script has automated. However this script depending upon the amount of input variables could take some time to run. It may be a... (5 Replies)
Discussion started by: jaysunn
5 Replies

5. Shell Programming and Scripting

How to fill data from other file and get some output

Greetings, I have a hard time creating a large number of user profiles in a database. The data file looks like this : 01/01/80 Mitch Conley . . . . And I need to put the output into: Name: Mitch Surname: Conley Birthday: 01/01/80 Thanks in advance! (3 Replies)
Discussion started by: hemo21
3 Replies

6. Shell Programming and Scripting

zenity progress and simultaneously terminal output

Hi, I want to use zenity --progress and also put the output to the terminal. I tried using the tee command but that puts the output to the terminal first and then shows the zenity progress dialog. Take the normal example by the gnome manual: ( echo "10" ; sleep 1 ... (0 Replies)
Discussion started by: sikku
0 Replies

7. Solaris

Unix command to fill filesystem

I have been trying to fill all available file space on my Solaris box for my project but have not been successful. I have tried the following script: tr '\0' '\060' < /dev/zero | dd of=zero2.txt bs=1024 count=1953125 But the only thing i get in return is this: "d: bad numeric argument:... (8 Replies)
Discussion started by: rbur101
8 Replies

8. Shell Programming and Scripting

Protecting variable indicator ($) from expansion

Hello, I use a lot this command to edit a bunch of files at once find . -name filename" | xargs -ifoo sh -c 'echo foo ; sed "s/pattern1/pattern2/" foo > ./tmp ; mv -f ./tmp foo' I'm trying to put a function on my .bashrc file. function loopSed() { local filename=$1 local... (2 Replies)
Discussion started by: phollox
2 Replies

9. Shell Programming and Scripting

Insert title as output of command to appended file if no output from command

I am using UNIX to create a script on our system. I have setup my commands to append their output to an outage file. However, some of the commands return no output and so I would like something to take their place. What I need The following command is placed at the prompt: TICLI... (4 Replies)
Discussion started by: jbrass
4 Replies

10. Programming

Script to monitor progress of find/exec command

hi all, i want to monitor the progress of a find and exec command, this is the code i use - find . -type f -exec md5sum {} \; >> /md5sums/file.txt this command works and produces a text file with all the md5sums but while running it doesnt show the progress is there anyway i can do this... (4 Replies)
Discussion started by: robertkwild
4 Replies
HD(4)							     Linux Programmer's Manual							     HD(4)

NAME
hd - MFM/IDE hard disk devices DESCRIPTION
The hd* devices are block devices to access MFM/IDE hard disk drives in raw mode. The master drive on the primary IDE controller (major device number 3) is hda; the slave drive is hdb. The master drive of the second controller (major device number 22) is hdc and the slave hdd. General IDE block device names have the form hdX, or hdXP, where X is a letter denoting the physical drive, and P is a number denoting the partition on that physical drive. The first form, hdX, is used to address the whole drive. Partition numbers are assigned in the order the partitions are discovered, and only non-empty, non-extended partitions get a number. However, partition numbers 1-4 are given to the four partitions described in the MBR (the `primary' partitions), regardless of whether they are unused or extended. Thus, the first logi- cal partition will be hdX5. Both DOS-type partitioning and BSD-disklabel partitioning are supported. You can have at most 63 partitions on an IDE disk. For example, /dev/hda refers to all of the first IDE drive in the system; and /dev/hdb3 refers to the third DOS `primary' partition on the second one. They are typically created by: mknod -m 660 /dev/hda b 3 0 mknod -m 660 /dev/hda1 b 3 1 mknod -m 660 /dev/hda2 b 3 2 ... mknod -m 660 /dev/hda8 b 3 8 mknod -m 660 /dev/hdb b 3 64 mknod -m 660 /dev/hdb1 b 3 65 mknod -m 660 /dev/hdb2 b 3 66 ... mknod -m 660 /dev/hdb8 b 3 72 chown root:disk /dev/hd* FILES
/dev/hd* SEE ALSO
mknod(1), chown(1), mount(8), sd(4) Linux 1992-12-17 HD(4)
All times are GMT -4. The time now is 02:26 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy