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1answer
27 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. ...
0
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0answers
28 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 ...
0
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0answers
31 views

/proc/diskstats and iostat are right? strange values on my test

My question is quite simple.. I am doing some tests to confirm the perfect work of both (diskstats and iostat) disk meters and something is wrong here. I write this command on cmd and I get the ...
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0answers
52 views

Saving Uploaded Files to Server from Tomcat

I'm running a web app on Tomcat7 on Ubuntu. I can upload a file, however I want to save the file on a temp directory on the server (not in the Tomcat directories). I guess my Tomcat server is ...
0
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0answers
34 views

How to tune HDD read cache? or alternative view on WD Green problem

Setup WD Green HDDs have a feature of parking themselves after 8 sec of inactivity. The timeout can be changed. My portable PC has WD Green HDD as well as another SSD. I have Ubuntu on SSD and use HDD ...
1
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1answer
48 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
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2answers
396 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 ...
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0answers
46 views

Complete I/O error HDD after doing dd

Ok, before reading this, I just want to say that this is not a duplicate post. I once owned a Seagate Momentus Thin 500GB that contains Windows 8. After messing up a bit, it restarted and what I saw ...
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0answers
86 views

Very inconsistant mouse wheel scrolling

Every time I start my Ubuntu the mouse wheel scroll seems to be set to a random amount. Normally it should scroll three line per click but each new boot it seems to set a random amount of scroll. I ...
1
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0answers
29 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
254 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
186 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: ...
0
votes
4answers
92 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
118 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 ...
0
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0answers
14 views

How to persist the output of espeak command line [duplicate]

Trying to persist the voice generated by espeak command line , we do the following espeak "Peace upon to you" > greeting.mp3 Unfortunately , we've got an empty MP3 file (0 bytes) How to ...
0
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0answers
171 views

File splicing – Input Output error

File splicing – Input Output error I need to copy about 1TB of data from an internal SATA disk to another external SATA disk. The copying consistently stops after some 300 to 400 GB, with the error ...
2
votes
1answer
175 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. Kernel is 3.13.0-39-generic GCC version 4.8 (i686-linux-gnu) Xorg version ...
0
votes
1answer
137 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 ...
0
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0answers
174 views

EXT4 - jbd2/dm-1-8 - lazy initialization

I am running an operation that requires a lot of disk IO. It was going extremely quickly on my 500GB SSD until jbd2/dm-1-8 appeared in my iotop and is now permanently at 95-99%. From reading online, ...
1
vote
1answer
80 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
111 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 ...
5
votes
2answers
2k 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, ...
2
votes
1answer
558 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
80 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
383 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 ...
8
votes
3answers
5k 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
199 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 ...
5
votes
1answer
3k 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
179 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: ...
5
votes
1answer
500 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
692 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
269 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
136 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
571 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
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5answers
2k 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 ...