On Tue, Oct 9, 2018 at 2:41 AM Andrey V. Elsukov <bu7c...@yandex.ru> wrote:
> On 08.10.2018 19:46, John Baldwin wrote: > > This needs a way to be overridden. If you have a machine installed with > a > > layout created prior to this change (e.g. a zpool mirror or RAID or some > > other mirror or RAID), you can no longer create a matching partition > since > > the starting sector is now always 40 instead of 34 and the partition size > > won't match. Also, while we may want to create sane layouts by default, > we > > should probably always provide a way to create less-sane layouts that are > > still conformant to the spec. I do wonder if this kind of default > > preference shouldn't belong in the userspace gpart tool rather than the > > kernel and the kernel should create any compliant layout as requested by > > userland instead. > > > > jpaetzel@ just ran into this case where he can't replace a failed disk > in a > > system running 12 that was first formatted on 10, so it's not academic. > > As a workaround you can try to copy first 34 sectors from old disk to > new using dd(1). And then use `gpart recover`. I think this should work. > Clever hack, but we shouldn't need crazy stuff like this.... Yes. This absolutely needs to be in userland, under user control. The rounding should *ALWAYS* be optional. The reported geometry that the code bases the 'rounding' on is bogus often times, and not invariant. I've fought with this misfeature since I was making CF images on a USB adapter that never had the right geometry for the system it was deployed into. It's silly. Warner _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
