Transfer Rate Disk Post: 302504499

Sponsored Content

Top Forums UNIX for Dummies Questions & Answers Transfer Rate Disk Post 302504499 by Corona688 on Monday 14th of March 2011 06:45:34 PM

03-14-2011

Registered User

Since this is Linux, if you send a SIGUSR1 to dd while it's in operation, it will print statistics to standard error.

Code:

# useless:  read /dev/zero, write /dev/null, in blocks of one megabyte
$ dd if=/dev/zero of=/dev/null bs=1048576 &
[1] 25076
$ killall -USR1 dd
4115+1 records in
4115+0 records out
4314890240 bytes (4.3 GB) copied, 2.38339 s, 1.8 GB/s
$ killall dd
[1]+  Terminated              dd if=/dev/zero of=/dev/null bs=1048576
$

It will also print a summary to standard error when it completes.

You may want to add "oflag=sync" to prevent cache effects from messing up your numbers.

These 2 Users Gave Thanks to Corona688 For This Post:

Corona688

View Public Profile for Corona688

Visit Corona688's homepage!

Find all posts by Corona688

3 More Discussions You Might Find Interesting

1. HP-UX

HP UX disk io rate question

I only have two disk in my HP machine but when i execute iostat command device bps sps msps c0t0d1 0 0.0 1.0 disk0 49 2.8 1.0 disk5 0 0.0 1.0 I didn't know where device name disk0 and disk5 device name disk0 disk5 ,it is really disk or...

2. UNIX for Dummies Questions & Answers

Very SLOW STFTP transfer rate

Hi, I am experiencing extremely show transfer rates when transferring zip files over SFTP. Over FTP it works fine. I have disabled compression in the sshd_config file but that does not seem to help.. Any ideas?

3. UNIX for Advanced & Expert Users

Limit transfer speed rate by iptables Rules

I have D-Link Router DSL-2730U that support busybox OS and iptables version 1.4.0 I managed successfully to block the host for being connect to the internet using the following command block by ip address iptables -I FORWARD -d 192.168.1.6 -j DROP Or By mac source iptables -I...

LEARN ABOUT DEBIAN

sg_rdac

SG_RDAC(8)							     SG3_UTILS								SG_RDAC(8)

NAME

       sg_rdac - Display or Modify RDAC Redundant Controller Page

SYNOPSIS

       sg_rdac [-a] [-f=LUN] [-v] [-V] DEVICE

DESCRIPTION

       sg_rdac	displays  or modifies the RDAC controller settings via the Redundant Controller Page (0x2C). When modifying the settings it allows
       to transfer the ownership of individual drives to the controller the command was received on.

OPTIONS

       -a     Transfer all (visible) devices

       -f=LUN Transfer the device identified by LUN. This command will only work if the controller supports 'Dual Active Mode' (aka  active/active
	      mode).

       -v     be verbose

       -V     print version string then exit

EXIT STATUS

       The exit status of sg_rdac is 0 when it is successful. Otherwise see the sg3_utils(8) man page.

AUTHOR

       Written by Hannes Reinecke <hare at suse dot com>, based on sg_emc_trespass.

REPORTING BUGS

       Report bugs to <dgilbert at interlog dot com>.

COPYRIGHT

       Copyright (C) 2006-2007 Hannes Reinecke, Douglas Gilbert.
       This  software  is distributed under the GPL version 2. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PUR-
       POSE.

sg3_utils-1.23							   January 2007 							SG_RDAC(8)