On Fri, Jul 24 2015, Paul Tobias wrote: > On 23 Jul 2015 16:18, <gottl...@nyu.edu> wrote: >> >> On Thu, Jul 23 2015, Paul Tobias wrote: >> >> > On 23 Jul 2015 02:31, <gottl...@nyu.edu> wrote: >> >> >> >> My new installation is running well, in particular it boots fine. >> >> However the grub2-mkconfig seems odd. >> >> >> >> It finds linux (all kernels) and the stub windows partition. But then > I >> >> get messages that both ext4-fs and FAT-fs have trouble with /dev/sda4, >> >> which is the extended partition. Perhaps the fact that the windows >> >> partitions sda[23] don't really have windows on them yet is part of the >> >> answer?? >> >> >> >> Has anyone else seen something like this? >> >> >> >> thanks, >> >> allan >> > >> > Maybe there was another partition on the disk around that location > before >> > and the file system signature is still lurking around? Run `wipefs >> > /dev/sda4`, that will show you which signatures are there. >> >> Wow what a command name! When I first read your msg I had a double >> take, since wiping (i.e., erasing) /dev/sda4 would erase my entire linux >> installation. Reading the man page helped, but I would like one more >> piece of assurance. Am I correct in believing/hoping that when the man >> page says >> >> When used without options -a or -o, it lists all visible filesystems >> and the offsets of their basic signatures. >> >> it means >> >> When used without options -a or -o, it lists all visible filesystems >> and the offsets of their basic signatures *and erases nothing*. >> >> I really don't want to damage any "signature" on the extended partition >> that is needed to access the "sub-partitions" it contains. As I said >> my newly installed gentoo resides on those sub-partitions. >> >> thanks. >> allan >> > > yes, wipefs doesn't actually write anything if ran without options. I use > it when I suspect blkid doesn't show me all the signatures. > > but my message was a shot in the dark because I didn't actually see the > exact error message you are getting. please send the output of wipefs > /dev/sda4 and the error message you are getting together with the actual > commands you are running to get the output. that way there will be more > helpful replies (and hopefully less flame).
Thank you. Unfortunately, I must start over. After successfully installing linux, I proceeded to install windows. The result was an unbootable system "invalid partition table" (thank you windows installer). I rebooted the linux installation disk and re-executed the grub2-install. I also entered fdisk and wrote out the result. Still unbootable. Now I remember why I always install windows (which is basically pushing a button) before installing linux. Next time I will run wipefs. allan PS I checked and the gentoo installation guide says that gpt without uefi prevents dual booting windows.
