install/54870: Incorrect size of USB stick calculated by sysinst

[guest01%vp.pl@localhost]

>Number:         54870
>Category:       install
>Synopsis:       Incorrect size of USB stick calculated by sysinst
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    install-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Jan 18 15:00:00 +0000 2020
>Originator:     guest01
>Release:        http://nycdn.netbsd.org/pub/NetBSD-daily/netbsd-9/202001160600Z/images/NetBSD-9.0_RC1-amd64-install.img.gz
>Organization:
-
>Environment:
NetBSD  9.0_RC1 NetBSD 9.0_RC1 (GENERIC) #0: Thu Jan  9 17:18:43 UTC 2020  mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/amd64/compile/GENERIC amd64
>Description:
When you install NetBSD 9.0_RC1 on USB stick, sysinst at the beginnig dislpays one size of the stick (for example 928M) and then when you setup NetBSD partitions total size is other (for example 232M).
>How-To-Repeat:
Boot computer with NetBSD 9.0_RC1 installation image and then select:
1. Install NetBSD to hard disk
2. Shall we continue? Yes
3. On which disk do you want to install NetBSD?
   b: sd0 (929M)
4. Sysinst could not automatically determine the BIOS geoemtry of the disk.
   The phisical geometry is 471 cylinders 16 sectors 63 heads.
   You will be prompted for the geometry. Please enter the number of sectors per track (maximum 63) and the number of heads (maximum 256) that the BIOS uses to access the disk. The number of cylinders will be calculated from the disk size.
   sectors [63]: enter
   heads   [16]: enter
5. Use default partition sizes

   Total size: 232M is displayed.

>Fix: