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 Post subject: Implementing ext4
PostPosted: Fri Aug 06, 2021 8:50 am 
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How would I implement the ext4 filesystem in my OS? The only detailed article on the wiki concerning ext is ext2.

Thanks :mrgreen:

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 Post subject: Re: Implementing ext4
PostPosted: Fri Aug 06, 2021 9:14 am 
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All the information you need should be here.


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 Post subject: Re: Implementing ext4
PostPosted: Fri Aug 06, 2021 2:45 pm 
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Thanks!

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 Post subject: Re: Implementing ext4
PostPosted: Tue Aug 31, 2021 4:52 pm 
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Where is the superblock located on the harddisk?

(I know this is probably a better question for a Linux forum, but I'll ask it here anyway.)

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 Post subject: Re: Implementing ext4
PostPosted: Tue Aug 31, 2021 5:24 pm 
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It starts at byte offset 1024 in the partition.


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 Post subject: Re: Implementing ext4
PostPosted: Wed Sep 01, 2021 5:03 pm 
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Is there an all-in-one doc containing all the specifications of ext4?

Also, I cannot find documentation on XFS, JFS, BTRFS, UFS, or ZFS . . .

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 Post subject: Re: Implementing ext4
PostPosted: Wed Sep 01, 2021 5:29 pm 
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PavelCheckov wrote:
Is there an all-in-one doc containing all the specifications of ext4?

This is the closest you're going to get.

PavelCheckov wrote:
Also, I cannot find documentation on XFS, JFS, BTRFS, UFS, or ZFS . . .

You're not looking very hard.


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 Post subject: Re: Implementing ext4
PostPosted: Wed Sep 01, 2021 6:21 pm 
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Allow me to be more specific: I cannot find any up-to-date documentation from the original site, and not from some unknown webpage on the corner of the web, which has a scan of it.

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 Post subject: Re: Implementing ext4
PostPosted: Thu Sep 02, 2021 1:54 am 
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Few FSes have formal specs (though counterexamples such as FAT exist). For most FSes that are originally implemented for Linux, the source is the most reliable documentation.

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