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Re: grub-probe detects ext4 wronly as ext2

From: Felix Zielcke
Subject: Re: grub-probe detects ext4 wronly as ext2
Date: Fri, 4 Jul 2008 10:33:59 +0200

From: "Bean" <address@hidden>
Sent: Friday, July 04, 2008 8:49 AM

First of all, grub-setup is conservative enough. It read the data
twice, one using host os, one using grub, and compare result. If the
data is corrupted, the comparison will fail and it will refuse to

I thought a few agos as I started to try out ext4 grub-install did success and then on reboot GRUB just failed with file not found. I just tried it out now again on Debian unstable with GRUB 2 1.96+20080626-1 with whole / as ext4 with extents,uninit_bg and flex_bg

grub-setup uses 100% CPU and last strace output is this:

open("/dev/sda1", O_RDONLY|O_SYNC)      = 3
ioctl(3, BLKFLSBUF, 0)                  = 0
lseek(3, 523279872, SEEK_SET)           = 523279872
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096) = 4096

Attached is the full strace output
For me personally this isn't a problem, I only use ext4 in VMware and I know now that GRUB doestn't work with it :)

Attachment: strace.txt
Description: Text document

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