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Date:      Fri, 20 Nov 2020 12:54:54 -0500
From:      Allan Jude <allanjude@freebsd.org>
To:        Mateusz Guzik <mjguzik@gmail.com>, mike tancsa <mike@sentex.net>
Cc:        Philip Paeps <philip@freebsd.org>, "Bjoern A. Zeeb" <bz@freebsd.org>, netperf-admin@freebsd.org, netperf-users@freebsd.org
Subject:   Re: zoo reboot Friday Nov 20 14:00 UTC
Message-ID:  <aeb25ce0-9b6e-275f-e81c-b849d4c51797@freebsd.org>
In-Reply-To: <CAGudoHH=H4Xok5HG3Hbw7S=6ggdsi%2BN4zHirW50cmLGsLnhd4g@mail.gmail.com>
References:  <1f8e49ff-e3da-8d24-57f1-11f17389aa84@sentex.net> <2691e1fd-5a27-4dd0-2ef7-b1c06fd4e751@sentex.net> <A3934CD4-57C1-4215-99F2-9500CB9EDC7C@neville-neil.com> <5A5094BC-D417-4BA6-97E2-7CB522B51368@FreeBSD.org> <4ec6ed6f-b3b4-22ae-e1ec-93a46f3d88ea@sentex.net> <d2ffd0f1-1dd8-dc6b-9975-93f20d7974a4@sentex.net> <dc8fed75-0262-c614-3292-6b8ce5addcfc@sentex.net> <0ddec867-32b5-f667-d617-0ddc71726d09@sentex.net> <CAGudoHHNN8ZcgdkRSy0cSaPA6J9ZHVf%2BBQFiBcThrtQ0AMP%2BOw@mail.gmail.com> <5549CA9F-BCF4-4043-BA2F-A2C41D13D955@freebsd.org> <ad81b5f3-f6de-b908-c00f-fb8d6ac2a0b8@sentex.net> <CAGudoHETJZ0f_YjmCcUjb-Wcf1tKhSF719kXxXUB3p4RB0uuRQ@mail.gmail.com> <CAGudoHH=H4Xok5HG3Hbw7S=6ggdsi%2BN4zHirW50cmLGsLnhd4g@mail.gmail.com>

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On 2020-11-20 12:49, Mateusz Guzik wrote:
> On 11/20/20, Mateusz Guzik <mjguzik@gmail.com> wrote:
>> CC'ing Allan Jude
>>
>> So:
>>
>>   pool: zroot
>>  state: DEGRADED
>> status: One or more devices could not be opened.  Sufficient replicas exist
>> for
>> 	the pool to continue functioning in a degraded state.
>> action: Attach the missing device and online it using 'zpool online'.
>>    see: https://openzfs.github.io/openzfs-docs/msg/ZFS-8000-2Q
>>   scan: scrub repaired 0B in 05:17:02 with 0 errors on Tue Aug 18 15:19:00
>> 2020
>> config:
>>
>> 	NAME                                            STATE     READ WRITE CKSUM
>> 	zroot                                           DEGRADED     0     0     0
>> 	  mirror-0                                      DEGRADED     0     0     0
>> 	    1517819109053923011                         UNAVAIL      0     0
>>    0  was /dev/ada0p3
>> 	    ada1                                        ONLINE       0     0     0
>> 	  mirror-1                                      ONLINE       0     0     0
>> 	    ada3p3                                      ONLINE       0     0     0
>> 	    ada4p3                                      ONLINE       0     0     0
>> 	  mirror-2                                      ONLINE       0     0     0
>> 	    ada5p3                                      ONLINE       0     0     0
>> 	    ada6p3                                      ONLINE       0     0     0
>> 	special	
>> 	  mirror-3                                      ONLINE       0     0     0
>> 	    gptid/db15e826-1a9c-11eb-8d25-0cc47a1f2fa0  ONLINE       0     0     0
>> 	    mfid1p2                                     ONLINE       0     0     0
>>
>> errors: No known data errors
>>
>> # dmesg | grep ada0
>> Trying to mount root from ufs:/dev/ada0p2 [rw]...
>> ada0 at ahcich0 bus 0 scbus0 target 0 lun 0
>> ada0: <WDC WD3003FZEX-00Z4SA0 01.01A01> ACS-2 ATA SATA 3.x device
>> ada0: Serial Number WD-WCC137TALF5K
>> ada0: 600.000MB/s transfers (SATA 3.x, UDMA6, PIO 8192bytes)
>> ada0: Command Queueing enabled
>> ada0: 2861588MB (5860533168 512 byte sectors)
>> ada0: quirks=0x1<4K>
>> Mounting from ufs:/dev/ada0p2 failed with error 2; retrying for 3 more
>> seconds
>> Mounting from ufs:/dev/ada0p2 failed with error 2.
>>   vfs.root.mountfrom=ufs:/dev/ada0p2
>> GEOM_PART: Partition 'ada0p3' not suitable for kernel dumps (wrong type?)
>> ZFS WARNING: Unable to attach to ada0p3.
>> ZFS WARNING: Unable to attach to ada0p3.
>> ZFS WARNING: Unable to attach to ada0p3.
>> ZFS WARNING: Unable to attach to ada0p3.
>> ZFS WARNING: Unable to attach to ada0p3.
>> ZFS WARNING: Unable to attach to ada0p3.
>>
>> # gpart show ada0
>> =>        34  5860533101  ada0  GPT  (2.7T)
>>           34           6        - free -  (3.0K)
>>           40          88     1  freebsd-boot  (44K)
>>          128     3072000     2  freebsd-swap  (1.5G)
>>      3072128  5857461000     3  freebsd-zfs  (2.7T)
>>   5860533128           7        - free -  (3.5K)
>>
>> Running naive dd if=/dev/ada0p3 works, so I don't know what zfs complains
>> about.
>>
> 
> Also note Philip's point boot partition of 44k. Is that too small now?
> 

Yeah, the very-small freebsd-boot suggests the bootcode has not been
updated in a while, so doesn't understand the 'special' vdev concept etc.

Likely what you want to do is:
gpart delete -i 1 ada0
gpart delete -i 2 ada0
gpart add -t freebsd-boot -s 512k -a 4k ada0
gpart add -t freebsd-swap -a 4k ada0


Which should steal a bit of space from that swap partition to make the
freebsd-boot larger.

then:

gpart bootcode -b /boot/pmbr -p /boot/gptzfsboot -i 1 ada0

to install the updated bootcode.



-- 
Allan Jude



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