Eight megabytes per second seems a bit slow even for a green drive, I think this can be optimized a bit.
The first dd does nothing but waste time, pipebench can read fine directly from tr. If you mean to fill the entire drive, count is redundant anyway -- dd will stop when it reaches the end. Or you could put bs and count on the final dd instead of the first.
Increasing the blocksize may make it more efficient. It doesn't need to match the drive's block size -- this isn't raw I/O.
It's also possible to get progress statistics from dd itself instead of using pipebench, by sending it SIGUSR1:
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)
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)
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)
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)
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)
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)
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)
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)
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)
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
LEARN ABOUT MINIX
mt
MT(1) General Commands Manual MT(1)NAME
mt - magnetic tape control
SYNOPSIS
mt [-f device] [count]
DESCRIPTION
Mt is a user interface to the magnetic tape commands described in mtio(4). It allows one to space a tape forwards or backwards, write end
of file markers, etc.
With the -f option a tape device can be named, otherwise the environment variable TAPE is used if set, otherwise the default device
/dev/nrst4 is assumed. Standard input is used if the tape name is a dash (-). The count argument is used to tell how many blocks or files
to space or how many file markers to write. It may be a C-style decimal, octal or hexadecimal constant, by default "1".
Command is the action to perform, it may be one of the following, or any unambiguous prefix (like st for status):
eof, weof Write count end-of-file markers.
fsf Forward space count file markers.
fsr Forward space count records. (The size of a record depends on the tape, and may even be variable, depending on the size of
the writes.)
bsf Backwards space count files. The count may be zero to backspace to the start of the current file. (A tape device need not
support backwards movement, or may be very slow doing it. Rewinding and forward spacing may be better.)
bsr Backwards space count records. The tape is positioned after the last block of the previous file if you hit a filemark when
spacing backwards. The block count is set to -1 to indicate that the driver has no idea where it is on the previous file.
eom Forward space to the end of media.
rewind Rewind the tape.
offline, rewoffl
Rewind and take offline. This may cause some drives to eject the tape.
status Shows the status of the drive, the sense key of the last SCSI error, current file number, current record number, residual
count if the last command that encountered end-of-file, and the current block size.
retension Removes tape tension by winding and rewinding the tape completely.
erase Erases the tape completely and rewinds it.
density Sets the density code to read or write the tape to count. Density codes supported depend on the drive. This command need
not be used if the drive senses the proper density on read and can only write one density.
blksize, blocksize
Sets the block size used to read or write the tape to count. This command may be used to select a fixed block size for a
variable block size tape. This will speed up I/O for small block sizes. Use a zero count to use variable sized blocks
again.
ENVIRONMENT
TAPE Tape drive to use if set.
FILES
/dev/nrst4 Default tape device.
SEE ALSO mtio(4), st(4).
AUTHOR
Kees J. Bot (kjb@cs.vu.nl)
MT(1)