[Bug 211028] [GEOM][Hyper-V] gpart can't detect the new free space after the disk capacity changes

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=211028

--- Comment #9 from Edward Tomasz Napierala <trasz at FreeBSD.org> ---
Hm.  Okay.  The read dd works, because the da(4) driver gets notified about the
capacity change on the first read command sent to the disk; basically the disk
responds with Unit Attention indicating this.  The write dd works, because it
forces GEOM retaste.  So it still fits the theory that GEOM itself is fine, and
it's just g_part(4) not handling it properly.

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