IO or I/O is a common shorthand for referring to Input and Output

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3answers
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How to change I/O priority of a process or thread in Win7?

Process Explorer is able to show the effective IO priority of a given thread, but not change it. Seeing as IO priority support is a comparatively new feature, most programs don't set their own IO ...
18
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2answers
7k views

Linux: Is there something similar to “top” for I/O?

My disk often is utilized, but top (and htop, a custom replacement) show nothing suspicious. Is there a way to sort processes by I/O (more specific: disk) utilization? EDIT Found out using iotop ...
26
votes
4answers
18k views

How do I find out what processes are accessing the hard disk in a GNU/Linux-based system?

I'm looking for the equivalent to top for disk access, so I can tell which process(es) are currently reading and/or writing to disk. I'm currently using Ubuntu, but I imagine there's a standard tool ...
3
votes
2answers
512 views

When a disk read or disk write occurs, where does the data go?

I understand that there is such a thing as a disk controller which contains a buffer, but was wondering if the CPU reads directly from this buffer, or whether the data must first go to a specific ...
17
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4answers
51k views

Windows 8 extremely high disk usage and slow IO

Problem After upgrading from Windows 7 to Windows 8 Professional, there seem to be a few disturbing problems. When I have the Task Manager open, I sometimes notice the disk usage climbing to 50, ...
7
votes
7answers
2k views

What's making my disk thrash in Windows XP?

I have a sick Windows XP laptop; something's making the disk thrash and the entire system is sluggish to unresponsive a few minutes after boot. How do I figure out what is making the disk thrash? Task ...
3
votes
1answer
1k views

Is it bad if millions of files are stored in one NTFS folder?

I have a very large NTFS volume with more than 20TB capacity and containing millions of files. If I put all of the files in the same folder, I know the performance is bad when I open the folder in ...
1
vote
4answers
176 views

How can RAM contain a “memory map” if RAM is unaware of the overall system?

This question concerns hardware more than software. Basically, citing from this article on memory maps, it says that: In computer science, a memory map is a structure of data (which usually ...
6
votes
1answer
5 views

Writing to subfolder is faster than writing to its parent

I use dd to measure write perfomance and observed something strange: writing to /data/emzed2 is faster than writing to /data. This is the way I measured the performance: $ dd if=/dev/zero ...
2
votes
1answer
3k views

How to limit disk usage (Write/I/O) by application? (NOT space usage)

I'm really annoyed by not being able to do a few jobs at a time even if I have plenty of RAM and CPU left to utilise - so it's the disk usage, for example when I am extracting big archives using ...
0
votes
1answer
99 views

Windows are unresponsive for a few seconds after boot (probably IO error with HDD)

When Windows is loaded and I am logged in into my desktop, the system gets unresponsive for about 10-15 seconds. During this time, the HDD led indicator at the case is either flashing or on (solid). ...
0
votes
1answer
838 views

CPU I/O communication

I know there is this question already discussed, but I still donĀ“t understand something, so please just help me clarify it. What I understand there is 2 way to do I/O aka communicate from CPU with ...