Guests in the classroom: @Rolman talks about persistent storage and filesystems

Submitted by gwolf on Wed, 11/26/2014 - 10:49

On November 14, as a great way to say goodbye to a semester, a good friend came to my class again to present a topic to the group; a good way to sum up the contents of this talk is "everything you ever wondered about persistent storage".

As people who follow my blog know, I like inviting my friends to present selected topics in my Operating Systems class. Many subjects will stick better if presented by more than a single viewpoint, and different experiences will surely enrich the group's learning.

So, here is Rolando Cedillo — A full gigabyte of him, spawning two hours (including two hiccups where my camera hit a per-file limit...).

Rolando is currently a RedHat Engineer, and in his long career, he has worked from so many trenches, it would be a crime not to have him! Of course, one day we should do a low-level hardware session with him, as his passion (and deep knowledge) for 8-bit arcades is beyond any other person I have met.

So, here is the full video on my server. Alternatively, you can get it from The Internet Archive.

Joan Peterson's picture

In operating systems i always

In operating systems i always suffers when memory management comes. I learned it a lot when sit again to try that. I forgot it again and again. Is there is any simple way to understand the topic of memory management. A confusion occurs at the time of solving Round Robin problem with the time stamp. A confusion occurs. Please provide any thing which will explain these topics easily.

gwolf's picture

Confusion on learning operating systems

Hi Joan,

I can try to explain you the topics that confuse you, but the question in this comment does seem a bit confused :-) (i.e. Round Robin does not handle any kind of time stamping).

Please contact me by email ( and I'll try to explain!

Post new comment

The content of this field is kept private and will not be shown publicly. If you have a Gravatar account associated with the e-mail address you provide, it will be used to display your avatar.
  • Web page addresses and e-mail addresses turn into links automatically.
  • Allowed HTML tags: <br> <b> <a> <em> <strong> <cite> <code> <ul> <ol> <li> <dl> <dt> <dd> <blockquote> <img> <h1> <h2> <h3> <tt> <pre> <strike> <table> <tr> <th> <td>
  • Lines and paragraphs break automatically.
  • Use <bib>citekey</bib> or [bib]citekey[/bib] to insert automatically numbered references.
  • Use [fn]...[/fn] (or <fn>...</fn>) to insert automatically numbered footnotes.
  • You can enable syntax highlighting of source code with the following tags: <code>, <blockcode>. The supported tag styles are: <foo>, [foo].

More information about formatting options

This question is for testing whether you are a human visitor and to prevent automated spam submissions.
Keep in mind that all comments will also have to be administrator-moderated. Don't waste your time writing a spam that no one will read.
Enter the code without spaces and pay attention to upper/lower case.