Re: head -r338804 boots threadripper 1950X fine; head -r338810+ do not; -r338807 seems implicated

From: Warner Losh <imp_at_bsdimp.com>
Date: Mon, 22 Oct 2018 10:26:23 -0600
On Mon, Oct 22, 2018 at 6:39 AM Mark Millard <marklmi_at_yahoo.com> wrote:

> On 2018-Oct-22, at 4:07 AM, Toomas Soome <tsoome at me.com> wrote:
>
> > On 22 Oct 2018, at 13:58, Mark Millard <marklmi at yahoo.com> wrote:
> >>
> >> On 2018-Oct-22, at 2:27 AM, Toomas Soome <tsoome at me.com> wrote:
> >>>
> >>>> On 22 Oct 2018, at 06:30, Warner Losh <imp_at_bsdimp.com> wrote:
> >>>>
> >>>> On Sun, Oct 21, 2018 at 9:28 PM Warner Losh <imp_at_bsdimp.com> wrote:
> >>>>
> >>>>>
> >>>>>
> >>>>> On Sun, Oct 21, 2018 at 8:57 PM Mark Millard via freebsd-stable <
> >>>>> freebsd-stable_at_freebsd.org> wrote:
> >>>>>
> >>>>>> [I built based on WITHOUT_ZFS= for other reasons. But,
> >>>>>> after installing the build, Hyper-V based boots are
> >>>>>> working.]
> >>>>>>
> >>>>>> On 2018-Oct-20, at 2:09 AM, Mark Millard <marklmi at yahoo.com>
> wrote:
> >>>>>>
> >>>>>>> On 2018-Oct-20, at 1:39 AM, Mark Millard <marklmi at yahoo.com>
> wrote:
> >>>>>>> . . .
> >>>>
> >>>
> >>> It would help to get output from loader lsdev -v command.
> >>
> >> That turned out to be very interesting: The non-ZFS loader
> >> crashes during the listing, during disk8, which shows a
> >> x0 instead of a x512.
> >>
> >
> > Yes, thats the root cause there. The non-zfs loader does only *read* the
> boot disk, thats why the issue was not revealed there.
> >
> > It would help to identify the sector size for that disk, at least from
> OS, so we can compare with what we can get from INT13.
> >
> > I have pretty good idea what to look there, but I am afraid we need to
> run few tests with you to understand why that disk is reporting sector size
> 0 there.
> >
> >
>
> Looks like I guessed wrong about the device
> for "drive8".
>
> So I unplugged the only other external
> storage device, so the original drives
> 0-13 become 0-11 overall.
>
> The machine has a multi-LUN media card reader with
> no cards plugged in. It is built-in rather than
> one that I plugged into a port. It has 4 LUN's.
>
> So 8+4=12 and drives 0-7 show up with media before
> it tries any of the 4 LUN's with no card in place.
>
> I conclude that "drive8" is an empty LUN in a media
> card reader.
>
> I conclude that there is no sector size available for
> any of the empty LUNs in the media reader.
>

I think you are probably right and we're hitting some divide by 0 error
when we should just ignore the disk.

Warner


> >
> >
> >> Hand transcribed from pictures:
> >>
> >> OK lsdev -v
> >> disk devices
> >> disk0: BIOS drive C (937703088 x 512):
> >> disk0p1: FreeBSD boot 512K
> >> disk0p2: FreeBSD UFS  356G
> >> disk0p3: FreeBSD swap 15G
> >> disp0p4: FreeBSD swap 76G
> >> disk1: BIOS drive D (16514064 x 512):
> >> disk1s1: Linux   2048KB
> >> disk1s2: Unknown 952GB
> >> disk2: BIOS drive E (16514064 x 512):
> >> disk2p1: Unknown 128MB
> >> disk3: BIOS drive F (16514064 x 512):
> >> disk3p1: Unknown 128MB
> >> disk4: BIOS drive G (16434495 x 512):
> >> disk2p1: Unknown     128MB
> >> disk4p2: DOS/Windwos 1716GB
> >> disk5: BIOS drive H (16434495 x 512):
> >> disk5p1: FreeBSD boot 512K
> >> disk5p2: FreeBSD UFS  176G
> >> disk5p3: FreeBSD swap 193G
> >> disp5p4: FreeBSD swap 15G
> >> disk6: BIOS drive I (16434495 x 512):
> >> disk6p1: Unknown     499MB
> >> disk6p2: EFI         99MB
> >> disk6p3: Unknown     16MB
> >> disp6p4: DOS/Windows 886G
> >> dis7: BIOS drive H (16434495 x 512):
> >> disk7p1: FreeBSD boot 512K
> >> disk7p2: FreeBSD UFS  953G
> >> disk8: BIOS drive K (262144 x 0):
> >>
> >> int=00000000  err=00000000  efl=00010246  eip=000286bd
> >> eax=00000000  ebx=72b50430  ecx=00000000  edx=00000000
> >> esi=00000000  edi=00092080  ebp=00091eec  esp=00091ea8
> >> cs=002b  ds=0033  es=0033    fs=0033  gs=0033  ss=0033
> >> cs:eip=f7 f1 89 c1 85 d2 0f 85-d8 01 00 00 6a 05 58 85
> >>       f6 0f 88 75 01 00 00 89-cb c1 fb 1f 89 ca 03 55
> >> ss:esp=09 00 00 00 00 00 00 00-0a 00 00 00 02 00 00 00
> >>       00 00 00 00 00 00 00 00-78 1f 09 00 33 45 04 00
> >> BTX halted
> >>
> >> I expect that "disk8" is what gpart show -p
> >> from a native boot showed as:
> >>
> >> =>       1  60062499    da1  MBR  (29G)
> >>        1        31         - free -  (16K)
> >>       32  60062468  da1s1  fat32lba  (29G)
> >>
> >> (That gpart show -p output is in another of the
> >> list messages.)
> >>
> >>> Also if you could test boot loader with UEFI - for example get to
> loader prompt via usb/cd boot and then get the same lsdev -v output.
> >>
> >> Still true given the above crash? Or, going the
> >> other way, should "drive8" be left as it is in
> >> order to be sure to do this test with the drive
> >> present?
> >>
> >> If I do this test later, it will take a bit to
> >> get media to do it with. (It is about 4AM in the
> >> morning and I've yet to get to sleep.)
> >>
> >> Note: I've never tried a UEFI based boot of FreeBSD
> >> on this machine (but the Windows 10 Pro x64 is EFI
> >> based). The only FreeBSD context using a EFI partition
> >> to boot that I have used is on an arm aarch64
> >> Cortex-A57 system.
> >>
> >>> I would be interested to see the sector size information and if the
> UEFI loader does also have issues.
> >>
> >> Understood.
> >>
> >>> If it does, I’d like to see the outputs from commands:
> >>
> >>> zpool status
> >>> zpool import
> >>
> >> Independent of the UEFI test . . .
> >>
> >> I do have a -r331924 head version on another one
> >> of the devices and can native-boot that. It still
> >> has its ZFS software (but a default loader without
> >> ZFS).
> >>
> >> Trying from that context, hand transcribed:
> >>
> >> # zpool status
> >> ZFS filesystem version: 5
> >> ZFS storage pool version: features support (5000)
> >> no pools available
> >> # zpool import
> >> #
> >>
> >> [That was based on the old (default) loader being
> >> a non-ZFS one.]
> >
> >
>
> ===
> Mark Millard
> marklmi at yahoo.com
> ( dsl-only.net went
> away in early 2018-Mar)
>
>
Received on Mon Oct 22 2018 - 14:26:37 UTC

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