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1
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1answer
127 views

Failed install of ubuntu 16.04 & 15.10 with error message “following file did not match its source copy…”

I am helping my son run Ubuntu on an old Dell desktop (Inspiron 580; 3G86G : Module,Processor,I3-550,3.2,4, Clarkdale,580/S; J510R : Module,Hard Drive,1TB,7.2K PHAR-XLOB P325K : Module,Dual In-Line ...
0
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0answers
53 views

IO Error: 32:Broken pipe , popen

I have a simple python script which installs mono-complete on machine. but what I observed is my first call always fail with error IO Error: 32:Broken pipe here is my script, I am not sure what is ...
1
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0answers
32 views

IOError: [Errno 29] Illegal seek Wavefile

Im trying to use wavebender library to create music and get data out of music. I get this error don't know how to solve this. from wavebender import * from itertools import * import sys def ncycles(...
0
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0answers
52 views

how can I limit disk IO per application?

I am in trouble with io bottleneck in my Ubuntu distro. Sometimes some greedy applications freeze my comp because of high io requests, I have to make hard reboot. For example, when I open multiple ...
0
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0answers
8 views

Cannot scan with Kodak ESP 3 AIO

I have a Kodak ESP 3 AIO printer. Running Trusty Tahr, it prints a test page. I cannot get the scanner to work with simple scan or Gscan2pdf or SANE, and receive ERROR DURING DEVICE I/O message? ...
1
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0answers
55 views

dconf-service extensive io (write) on any key press

Fresh Ubuntu 15.10 installation on my home server PC. I noticed that dconf-service performs constant file creation and writes (?) to config files in home dir of current user on any key press. iotop ...
0
votes
2answers
57 views

Operation on one disk overloads other disks

I'm using Ubuntu 15.04 with MD RAID1, LVM and LXC on top of them as a webserver. I have normal load average about 1-2, and all is working well until I perfrom any massive IO operation. The strange ...
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0answers
107 views

how to set disk IO scheduler automatically

Grub line doesn't work: GRUB_CMDLINE_LINUX_DEFAULT="elevator=bfq" "udev rules" doesn't work while a boot time. But works when I mount a disk in a loaded system. # set deadline (noop) scheduler ...
7
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1answer
346 views

System locks up when disk I/O is saturated

When I do a large file transfer from my external USB3 hard drive to my internal hard drive (or vice versa), be it via Nautilus or via terminal, Ubuntu (Unity) will almost completely lock up. Things ...
0
votes
1answer
358 views

Is closing a file after having opened it with `open()` required in Python? [closed]

Regarding my previous question, I noticed that in both answers that used the open() function, there was no mention of closing the file. I've read that it's good practice to do so, but is there ...
2
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3answers
5k views

Poor IO performance - PCIe NVMe Samsung 950 pro

I just finished a hardware build expecting a big gain from the new NVMe drive. My prior performance was lower than expected (~3gb transferred), so I've replaced the motherboard/cpu/memory/hdd. While ...
-1
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1answer
59 views

What performances should I expect with USB3?

My PC has 24GB DDR3 RAM, i7-4770 (8 cores) and a number of USB3 ports. That local system RAID0 (md) has been showing good performances so far, 900 - 1000 MBps with dd if=/dev/zero of=./testdata bs=...
1
vote
1answer
374 views

Docker performance on ubuntu host 2x+ worse than OSX host

Ok, let's start over after a bunch of investigation. Here is what we know: Ubuntu host 15.04 on i7 3820 (quad 3.6) and Samsung 850 pro SSD 512gb SATA 6 $ docker info Containers: 2 Images: 101 ...
1
vote
1answer
129 views

What is mapping fiber channel upon install of 14.04?

We installed 14.04 that is connected to a fiber channel. I was expecting to wrestle with multipath to get the LUNs connected, but I noticed that I am mounted to the fiber channel right after install. ...
1
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0answers
147 views

What is causing this disk I/O spike?

I have a Raspberry Pi 2 with Ubuntu 14.04 installed and I'm experiencing a strange problem. I'm attempting to use sbuild to build a Debian package and everything works well enough for the first few ...
1
vote
1answer
119 views

Using dd to test Write speeds

I'm trying to check the write speed of different devices that I have using the following: dd bs=1M count=256 if=/dev/zero of=/path/to/device oflag=dsync I want an accurate reading of write speed ...
5
votes
2answers
708 views

How to trace/monitor the I/O of a Linux command

I ran find / -name abc.html and a short time after I ran this command again. This time it was very fast, so I know the find must be caching the result somewhere. How can I find out where the cache is ...
2
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0answers
185 views

Cgroups I/O read restriction

I am trying to restrict group to read operation to 100 per second. Here is my cgroups configuration: # Configuration file generated by cgsnapshot mount { blkio = /cgroup/blkio; } group ...
5
votes
3answers
524 views

Writing to a specific memory location

I am trying to edit a file inside /proc/devices-tree to be exact, and i am unable to do so, I am getting: "permission denied" or "Input/Output error". I have tried all possible combinations of ...
1
vote
1answer
438 views

Main data drive giving I/O errors

My main data drive is throwing up all sorts of weird I/O Errors: (tail of dmesg output) [ 7081.267852] sd 4:0:0:0: [sdb] Unhandled error code [ 7081.267856] sd 4:0:0:0: [sdb] Result: hostbyte=...
0
votes
4answers
106 views

Small SSD, large SATA. What can I move to SATA?

I've got a 601GB Linux partition which can be written to at up to 84.7MB/s (ref). My 62GB can be written to at 366MB/s (ref). Down to my last ~360MB. What should I move over and mount from my other ...
1
vote
1answer
345 views

Segfaults and “Read-only filesystem” after a dist-upgrade

After running an apt-get dist-upgrade on my 14.04 home server, it seems like something may have gone wrong which has left the box unusable. It all started with this: Preparing to unpack .../linux-...
2
votes
1answer
317 views

Why does my Ubuntu 14.04 desktop lock up when I do large data transfers between hard drives?

I am running Ubuntu 14.04 on a system that I built from parts. All software is up to date according to update manager. System details: Kernel is 3.13.0-39-generic GCC version 4.8 (i686-linux-gnu) ...
0
votes
1answer
177 views

Crash, followed by I/0 error

I'm looking for help diagnosing an issue I'm having with Ubuntu 14.04 64bit. I'm a relative newbie to all this, so I'm not really sure where to start. Basically what happens is this: computer ...
1
vote
1answer
118 views

Disk monitor software

Can't find something similar to windows resource monitor software (input output monitor). I need tool which draws disk load graphic and processes which uses disk input or output. There are a lot of ...
0
votes
1answer
245 views

How To write to Sub-D I/O using bash

I want to control(write and read) the sub-d parallel Pins (usually used for interfacing a printer) using bash-scripts. I know, that I could use pySerial or c, but I don't like them;). I want to use ...
6
votes
2answers
4k views

sh: echo: I/O error on pm-suspend Ubuntu 14.04

I just installed Ubuntu 14.04 on my Fujitsu Lifebook U772 after a long hiatus with Opensuse and after the install, it appears that pm-suspend works out of the box. A few days of setting up later, ...
3
votes
1answer
724 views

14.04 System hangs and IO errors

To my surprise, after todays fresh Ubuntu 14.04 install (fully updated as of today) I'm getting various problems like random hangs and I/O errors when copying/moving files (moving backup from HDD to ...
1
vote
0answers
123 views

Something is using my external drive. How do I find out what?

Whenever I attach my external LUKS drive to my laptop, the drive head starts rattling like crazy, as if I am copying the entire thing. Every now and then it pauses. I've seen some tools like iostat ...
1
vote
0answers
513 views

iotop shows 99.8% IO load on “--render” and “--extension” and “dropbox \fataldb” processes

folks. System works more or less fine, but stucks from time to time. I've tried to detect using iotop it and it seems that disk io is the bottleneck. chrome and jbd2 keep writing to disk all the ...
13
votes
4answers
11k views

How can System Monitor display disk io?

I can't imagine this is not possible.... but I can't figure out where to enable it. can't system monitor (gnome-system-monitor) display disk io?
1
vote
1answer
227 views

Too much disk read/write when launching an application

I have Xubuntu 13.04 on an old Dell Inspiron with 1 GB RAM and about 2 GB swap. Each time I launch an application (e.g. Thunar or Evince) it takes a pretty long time to be launched and I see a lot ...
7
votes
1answer
5k views

jbd2 constantly writing to disk [closed]

I know there are related issues, but none of them seem to apply to my case. Below is iotop output. jbd2 is constantly above 90% usage. It's been grinding away for 2 days. It stops for a while after a ...
0
votes
2answers
2k views

I/O error while reading a certain VCDs that plays well in windows in the same system

This is an annoying problem in Ubuntu 12.04/12.10/13.04 that I can't play a certain VCDs. This is not a missing codec or encrypted content issue - It raises an I/O error. Well, I suspected the VCD ...
1
vote
1answer
229 views

How can I find what process is trying to write to a CD that's offline?

I've got a Virtual CD which can mount remote media via IPMI. After doing an install of Ubuntu 12.10 I'm getting this error every 2 sec in the syslog and on the console: [628.890722] sr 6:0:0:0: ...
7
votes
1answer
920 views

Show files being accessed most in a short time period

So I've got a server that's struggling under the weight of several Wordpress installs. Things are relatively well cached (I am planning to improve things anyway) but I can quickly see that disk IO is ...
2
votes
3answers
1k views

Format partition to what block size for photos only

I have a lot of photos and am working on them extensively, mainly going quickly through them back and forth via a Photo Browser and also doing some work via scripts. Would that make sense to format ...
2
votes
1answer
309 views

How to prevent system blocking due to some I/O activities?

Sometimes my system (Ubuntu 10.04 .. 12.04) becomes almost unresponsive due to some I/O activities. For example, this happens when some RAM content is being moved to swap on resume from suspend mode. ...
2
votes
1answer
161 views

is there a way to create graphs for IO on server

is there a tool which allows to save a simple data to a file regarding the IO usage, so that I could use them to display a graph of IO usage? I need to use it on my server, with no graphical ...
0
votes
3answers
617 views

Disk operations consuming all memory - Ubuntu 12.10 i386

I'm having a strange problem with a new clean install of Ubuntu 12.10, any disk operations I do, like restoring a backup eats all my 8gb of ram, and it doesn't seen to release the memory, so I'm using ...
9
votes
5answers
3k views

What is causing Unity to be slow on startup?

A few days ago I noticed that after I login in, the top panel and the dash took a bit more time to load and I noticed more disc activity than usual. I thought that it might have been caused by some ...