Re: Installing on extended partition

[Samuel Thibault <sthibault@debian.org>]

Parodper, le sam. 28 août 2021 14:35:16 +0200, a ecrit:
> O 28/08/21 ás 11:33, Samuel Thibault escribiu:
> > Parodper, le sam. 28 août 2021 10:56:07 +0200, a ecrit:
> > > I still get the unknown partition table, and doing head /dev/hd0s1 fails
> > > with a «Input/Output error». head /dev/hd0 works fine.
> > > 
> > > Tried doing settrans -a /dev/hd0s1 /hurd/storeio -T typed part:1:device:hd0;
> > > head /dev/hd0s1 and still getting IO error. The command also ends and does
> > > not output any error.
> > 
> > Looking at hurd/libstore/part.c, I see
> > 
> > if (run.start % source->block_size != 0)
> >    err = EIO;
> > if (run.length % source->block_size != 0)
> >    err = EIO;
> > 
> > could it be that your partitions are not aligned on 4096 bytes?

Scratch that, the block size returned by the mach block driver is 512 bytes,
so that cannot be a problem.

> /dev/sda1 : start=          63, size=     4208967, type=b, bootable #FreeDOS
> partition
> /dev/sda2 : start=     4209030, size=    71682030, type=a6	#OpenBSD
> partition
> /dev/sda3 : start=    75891060, size=    30716280, type=81	#Minix3 partition
> /dev/sda4 : start=   106607401, size=   205967877, type=f	#Extended
> partition
> /dev/sda5 : start=   106607403, size=    40965687, type=6	#HaikuOS

I tried building this partition table, and didn't have any problem.

> Something that I just noticed on this test was that, on boot, the kernel (I
> guess?) showed the hd0 disk and all the partitions.

Yes, that's coherent with the node built by MAKEDEV being fine with the
partition table.

> The thing is parted does not recognize the partition table

Does it have trouble when run from other OSes as well?  Then I'd say
debug it from there.

Samuel