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 Forum index » House Training » Users ( For the regulars )
Why use Ext 3 and not Ext 4 format?
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bigpup


Joined: 11 Oct 2009
Posts: 10046
Location: Charleston S.C. USA

PostPosted: Tue 30 Jan 2018, 11:36    Post subject:  Why use Ext 3 and not Ext 4 format?  

I am not totally convinced that ext 4 is totally bug free.
Ext 4 bug report.
https://bugzilla.kernel.org/buglist.cgi?bug_status=NEW&bug_status=REOPENED&bug_status=ASSIGNED&component=ext4&product=File%20System
Bug report for ext 3
https://bugzilla.kernel.org/buglist.cgi?bug_status=NEW&bug_status=REOPENED&bug_status=ASSIGNED&component=ext3&product=File%20System

Ext 3 - 7 bugs.
Ext4 - 74 bugs.

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april


Joined: 14 Sep 2013
Posts: 1073
Location: Green Island baby!

PostPosted: Wed 31 Jan 2018, 17:28    Post subject:  

Gotta say here that since switching to exclusive Ext4 I have not had a fail. I was always getting lost nodes in ext2.

I picked a random issue and looked at that. https://bugzilla.kernel.org/show_bug.cgi?id=194567 and it appeared to be related to a huge file system of a size I would never get near.

So I'd suggest you would need to analyse each issue to see what the real problems turn out to be , but I;ll leave that to you bigpup .
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mikeslr


Joined: 16 Jun 2008
Posts: 2187
Location: 500 seconds from Sol

PostPosted: Wed 31 Jan 2018, 18:24    Post subject:  

https://www.thegeekstuff.com/2011/05/ext2-ext3-ext4/

For those of us who occasionally explore older Puppies --and especially those who can only use them-- Puppies whose kernel's predate 2.6.19 can't be run from a Linux Ext4 partition.

I don't have a drive larger than 32 Terabytes, the limit which Linux Ext 3 can handle.

Although I didn't find any information about it --I didn't do an exhaustive search-- I have a sneaking suspicion that in order to control more hardware Linux Ext4 will use more hard-drive space and more computing resources (CPU and RAM) for itself than Ext3. It might not be much. But unless I have a need to control over 32 Terabytes, why take the chance of 'wasting' the computing resources I do have?

mikesLr
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musher0


Joined: 04 Jan 2009
Posts: 11674
Location: Gatineau (Qc), Canada

PostPosted: Wed 31 Jan 2018, 23:21    Post subject:  

Well... why use ext3 when you can use ext2? It leaves more room on the partition.
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musher0
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"Logical entities must not be multiplied beyond necessity." | |
« Il ne faut pas multiplier les entités logiques sans nécessité. » (Ockham)
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drunkjedi


Joined: 24 May 2015
Posts: 708

PostPosted: Thu 01 Feb 2018, 00:04    Post subject:  

Ext2 shows 3 reported bugs.
Btrfs shows 200....
Fat/vfat shows 3, ntfs is not in the list...

UDF shows 4, I remember a discussion about using a filesystem like udf which can be accessed from win and Linux both.

By the way, squashfs shows zero reported bugs....
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bigpup


Joined: 11 Oct 2009
Posts: 10046
Location: Charleston S.C. USA

PostPosted: Thu 01 Feb 2018, 11:56    Post subject:  

musher0 wrote:
Well... why use ext3 when you can use ext2? It leaves more room on the partition.

The biggest thing bad about ext 2 is it can get corrupted over time or is easier to corrupt.

However, if you have the pfix=fsck as an option in the boot menu entry kernel line. That seems to fix the corruption problem.
It does a file system check each time you boot and corrects any errors it finds.
Code:
kernel /xenialpup6475uefi/vmlinuz   psubdir=xenialpup6475uefi pmedia=atahd pfix=fsck

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When I was a kid I wanted to be older.... This is not what I expected Shocked
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musher0


Joined: 04 Jan 2009
Posts: 11674
Location: Gatineau (Qc), Canada

PostPosted: Thu 01 Feb 2018, 12:43    Post subject:  

You said it!
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musher0
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"Logical entities must not be multiplied beyond necessity." | |
« Il ne faut pas multiplier les entités logiques sans nécessité. » (Ockham)
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slavvo67

Joined: 12 Oct 2012
Posts: 1499
Location: The other Mr. 305

PostPosted: Fri 02 Feb 2018, 00:37    Post subject:  

In using Quirky, I use vfat and f2fs as the defaults. I've had very little issue with either; though I usually don't keep them around more than a year before overwriting with a new version of things.

I never really had a problem with ext2 and never used ext 3 or ext 4. As Mike stated and as I also recall, the ext3 and ext4 were not working in some of the earlier puppies I tried; so I basically took them off of my to use list.
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amigo

Joined: 02 Apr 2007
Posts: 2640

PostPosted: Fri 02 Feb 2018, 15:44    Post subject:  

I still use ext3 almost exclusively -I like nice and stable file systems.
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