Hard Disks and File Systems Part 4

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Time
17 hours 41 minutes
Difficulty
Beginner
CEU/CPE
18
Video Transcription
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>> Hi, welcome back to the course.
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In the last video, we talked about
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the different boot processes.
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We talked about Windows, Mac, and Linux.
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Again, we just took a very high-level overview
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of those particular boot processes.
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In this video, we're going to start our discussion
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on the different file systems.
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We're going to talk about FAT versus NTFS.
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As I mentioned, we have FAT and NTFS,
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so FAT16, FAT32, and also NTFS.
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We're going to talk about each one
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of these just a little bit.
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Again, this is another 10,000
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foot overview of these file systems.
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FAT16 or as FAT stands for as
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you may or may not already know file allocation table.
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This FAT16 was designed for
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smaller disk and then also simple folder structures,
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so nothing complex at all.
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You use to find this
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commonly like digital cameras
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or even like flash drives, etc.
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The files are also stored at the start of
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the file Then came along FAT32.
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This one is a little more efficient on
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space utilization and mostly
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because it uses smaller clusters and then there's also
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no restrictions on entries into the root folder.
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Then we have NTFS.
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This is the more common one that
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you'll see nowadays for the most part.
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New technology file system.
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One thing to keep in mind for your examination that
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the bitmap file keeps track of used and unused clusters,
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so just keep that in mind.
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Then also it offers compression, auditing, etc.
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It also supports RAID,
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which is very important to know as
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well is that it supports journaling.
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Just keep that in mind as well
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as you're studying for the exam,
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that NTFS supports journaling.
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We have different Linux file systems.
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Ext, Ext2, Ext3, and Ext4.
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Now, Ext is a very old one.
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You may not actually see that out in the real world.
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A lot of Linux platforms are built on Ext2.
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However, you'll start to see
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the more the common things probably out there,
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Ext2 and Ext3,
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with Ext4 being more adopted as well.
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EXT, so again,
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as I mentioned, this was the early one.
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This is the first file system for Linux.
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Way back in 1992 is the estimate there.
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The extended file system is
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what the Ext stands for and then
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the metadata structure is similar to
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the UFS or Unix file system.
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Ext2, so again, as I mentioned,
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this one is seen commonly in many Linux distributions.
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The superblock in it
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stores information about the size and shape of Ext2.
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That's something you definitely want to make
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sure you know for the CHFI exam.
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Then also the data is stored in
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blocks is the same length.
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We have Ext3 the key thing to
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note here is that it offers journaling.
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Again, make sure you just memorize that for the exam.
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Then the max single file size is two terabytes.
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Then we have Ext4.
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Here the max single file size is 16 terabytes.
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You see that we go up significantly there.
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Then also this one has better scale and reliability,
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specifically more so than Ext, Ext2.
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Then as I mentioned, this one with
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the increase of reliability that's due
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to increase performance and then also reducing
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the fragmentation over the other Ext options.
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Just one quick post-assessment question here.
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NTFS is a file system for Linux.
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Is that true or false?
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We obviously knew that was false.
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NTFS is a type of Windows file system.
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Again, that answer was false.
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In this video, we just went over again,
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a very high level of FAT,
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NTFS, and also the Linux extended file systems.
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In the next video, we're going to talk about HFS,
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HFS Plus, both for Mac
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as well as we're going to talk about the RAID levels.
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Again, the RAID levels are something you'll
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definitely want to know for the examination.
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