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Re: Hard Disk size limits on GNU Hurd

From: Tanguy LE CARROUR
Subject: Re: Hard Disk size limits on GNU Hurd
Date: Fri, 22 Mar 2024 13:33:59 +0100
User-agent: alot/0.10

Hi Samuel, hi Jose Luis,

Sorry for hijacking the thread, but I have a problem that might, or
might not, be related to the topic…

Quoting Samuel Thibault (2024-03-22 12:37:33)
> Jose Luis Alarcon Sanchez, le ven. 22 mars 2024 12:31:04 +0100, a ecrit:
> > Several years ago there was a limit in the size of the hard disks that Hurd
> > could manage. If i'm not wrong, i think it was 5 Gb. or so.
> > 
> > Is still this limit working right now?, or can i create a disk image (for
> > kvm) with the size i decide (20 Gb. let's say)?.
> Please read the faq ;)
> https://darnassus.sceen.net/~hurd-web/faq/
> https://darnassus.sceen.net/~hurd-web/faq/2_gib_partition_limit/

On Guix —sorry for the shameless publicity for Guix!—, we have a way to
offload package builds from a host to a ChildHurd [1]. Basically,
it’s a Hurd VM.

[1]: https://guix.gnu.org/en/blog/2020/childhurds-and-substitutes/

It was working fine until I ran short of disk space and increased it to
20Gb. Now, it randomly crashes with error messages like:

ext2fs: BUG: unexpected fault on disk image (10, 0x8ffc000) in
[0xB8222000,0x18222000) eip 0x8052224 err 0xa


ext2fs: disk-pager.c:109: fault_handler: Assertion ’err’ failed.

Now that I know I’m not hitting the disk size limit —thanks for
pointing to the FAQ!—, I’m wondering what the problem might be?
Any idea?!


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