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Date:      Tue, 28 Nov 2023 12:55:30 -0700
From:      Warner Losh <imp@bsdimp.com>
To:        Miroslav Lachman <000.fbsd@quip.cz>
Cc:        FreeBSD-STABLE Mailing List <freebsd-stable@freebsd.org>
Subject:   Re: Missing disk partition devices and GPT lables in /dev/
Message-ID:  <CANCZdfohrv_ghQUp6CZ9S%2BjWRE_ER36pQxq8muhp08vg6kJynA@mail.gmail.com>
In-Reply-To: <34a54774-004d-40de-bf0d-2985da5bc908@quip.cz>
References:  <34a54774-004d-40de-bf0d-2985da5bc908@quip.cz>

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On Tue, Nov 28, 2023 at 12:51=E2=80=AFPM Miroslav Lachman <000.fbsd@quip.cz=
> wrote:

> I have strange problem on one of my machines - the disk devices in /dev/
> are only shown as ada0 and ada1 but no partition devices, no devices in
> /dev/gpt/ or /dev/gptid/, these directories are completely missing even
> though there are GPT labels.
> This is FreeBSD 13.2-RELEASE-p5 amd64 on HP Microserver Gen8. Disk are 2
> Seagate NAS 4TB, manually partitioned with gpart utility, zpool created
> and then all the date migrated by zfs send and zfs receive from old 2TB
> disks. Everything works, system is running but device nodes in /dev/ are
> missing. I noticed this only when I want to create gmirrored swap from
> ada0p4 and ada1p4 but got "No such file or directory."
>
> There are only diskid style devices in /dev/diskid/
>
> gpart show -l shows correct GPT labels for partitions
>
> # gpart show -l
> =3D>        40  7814037088  diskid/DISK-Z3010G8V  GPT  (3.6T)
>            40        1024                     1  bootG8V  (512K)
>          1064       40960                     2  efiG8V  (20M)
>         42024    83886080                     3  diskG8Vsys  (40G)
>      83928104    20971520                     4  swapG8V  (10G)
>     104899624  7707033600                     5  diskG8Vtank0  (3.6T)
>    7811933224     2103904                        - free -  (1.0G)
>
> =3D>        40  7814037088  diskid/DISK-Z302YC90  GPT  (3.6T)
>            40        1024                     1  bootC90  (512K)
>          1064       40960                     2  efiC90  (20M)
>         42024    83886080                     3  diskC90sys  (40G)
>      83928104    20971520                     4  swapC90  (10G)
>     104899624  7707033600                     5  diskC90tank0  (3.6T)
>    7811933224     2103904                        - free -  (1.0G)
>
>
> But gpart show -p does not show ada0p1 ada0p2 ..ada0pN, it shows diskid
> style entries
>
> # gpart show -p
> =3D>        40  7814037088    diskid/DISK-Z3010G8V  GPT  (3.6T)
>            40        1024  diskid/DISK-Z3010G8Vp1  freebsd-boot  (512K)
>          1064       40960  diskid/DISK-Z3010G8Vp2  efi  (20M)
>         42024    83886080  diskid/DISK-Z3010G8Vp3  freebsd-zfs  (40G)
>      83928104    20971520  diskid/DISK-Z3010G8Vp4  freebsd-swap  (10G)
>     104899624  7707033600  diskid/DISK-Z3010G8Vp5  freebsd-zfs  (3.6T)
>    7811933224     2103904                          - free -  (1.0G)
>
> =3D>        40  7814037088    diskid/DISK-Z302YC90  GPT  (3.6T)
>            40        1024  diskid/DISK-Z302YC90p1  freebsd-boot  (512K)
>          1064       40960  diskid/DISK-Z302YC90p2  efi  (20M)
>         42024    83886080  diskid/DISK-Z302YC90p3  freebsd-zfs  (40G)
>      83928104    20971520  diskid/DISK-Z302YC90p4  freebsd-swap  (10G)
>     104899624  7707033600  diskid/DISK-Z302YC90p5  freebsd-zfs  (3.6T)
>    7811933224     2103904                          - free -  (1.0G)
>
>
> # gpart list | grep label
>     label: bootG8V
>     label: efiG8V
>     label: diskG8Vsys
>     label: swapG8V
>     label: diskG8Vtank0
>     label: bootC90
>     label: efiC90
>     label: diskC90sys
>     label: swapC90
>     label: diskC90tank0
>
>
> # ll /dev/gpt/
> ls: /dev/gpt/: No such file or directory
>
>
> # ll /dev/ada*
> crw-r-----  1 root  operator   0x73 Nov 27 00:00 /dev/ada0
> crw-r-----  1 root  operator   0x81 Nov 27 00:00 /dev/ada1
>
>
> Sysctl seems normal to me.
>
> # sysctl kern.geom.label
> kern.geom.label.disk_ident.enable: 1
> kern.geom.label.gptid.enable: 1
> kern.geom.label.gpt.enable: 1
> kern.geom.label.ufs.enable: 1
> kern.geom.label.ufsid.enable: 1
> kern.geom.label.reiserfs.enable: 1
> kern.geom.label.ntfs.enable: 1
> kern.geom.label.msdosfs.enable: 1
> kern.geom.label.iso9660.enable: 1
> kern.geom.label.flashmap.enable: 1
> kern.geom.label.ext2fs.enable: 1
> kern.geom.label.debug: 0
>
>
> This is the only way I can access disk partitions
>
> # ll /dev/diskid/
> total 0
> crw-r-----  1 root  operator   0x7f Nov 27 00:00 DISK-Z3010G8V
> crw-r-----  1 root  operator   0x99 Nov 27 00:00 DISK-Z3010G8Vp1
> crw-r-----  1 root  operator   0x9b Nov 27 00:00 DISK-Z3010G8Vp2
> crw-r-----  1 root  operator   0x9d Nov 27 00:00 DISK-Z3010G8Vp3
> crw-r-----  1 root  operator   0x9f Nov 27 00:00 DISK-Z3010G8Vp4
> crw-r-----  1 root  operator   0xa1 Nov 27 00:00 DISK-Z3010G8Vp5
> crw-r-----  1 root  operator   0xad Nov 27 00:00 DISK-Z302YC90
> crw-r-----  1 root  operator   0xc5 Nov 27 00:00 DISK-Z302YC90p1
> crw-r-----  1 root  operator   0xc7 Nov 27 00:00 DISK-Z302YC90p2
> crw-r-----  1 root  operator   0xc9 Nov 27 00:00 DISK-Z302YC90p3
> crw-r-----  1 root  operator   0xcb Nov 27 00:00 DISK-Z302YC90p4
> crw-r-----  1 root  operator   0xcd Nov 27 00:00 DISK-Z302YC90p5
>
>
> I created two pools (sys and tank1) with adaN devices when there were 4
> disks and the system was booted from USB flash drive with FreeBSD 13.2;
> current ada0 was ada2 and current ada1 was ada3.
>
> These commands were used
>
> # zpool create -m none sys mirror ada2p3 ada3p3
>
> # zpool create -m none tank1 mirror ada2p5 ada3p5
>
> But now, when the system is booted of these disks, they are reported
> only by diskids.
>
> # zpool list -v
> NAME                         SIZE  ALLOC   FREE  CKPOINT  EXPANDSZ
> FRAG    CAP  DEDUP    HEALTH  ALTROOT
> sys                         39.5G  15.9G  23.6G        -         -
> 12%    40%  1.00x    ONLINE  -
>    mirror-0                  39.5G  15.9G  23.6G        -         -
> 12%  40.2%      -    ONLINE
>      diskid/DISK-Z3010G8Vp3    40G      -      -        -         -
> -      -      -    ONLINE
>      diskid/DISK-Z302YC90p3    40G      -      -        -         -
> -      -      -    ONLINE
> tank1                       3.58T  1.22T  2.36T        -         -
> 0%    34%  1.00x    ONLINE  -
>    mirror-0                  3.58T  1.22T  2.36T        -         -
> 0%  34.0%      -    ONLINE
>      diskid/DISK-Z3010G8Vp5  3.59T      -      -        -         -
> -      -      -    ONLINE
>      diskid/DISK-Z302YC90p5  3.59T      -      -        -         -
> -      -      -    ONLINE
>
>
> I did similar setup and migration many times and never seen this problem.
>
> What can be wrong with this system?
>

The problem is a geom design point. When you have multiple aliases that you
can open, the others are removed from the filesystem view when one is
opened. It looks like from the above that the mirror-0 was created with the
diskid, so that's the device that zfs opens, leaving the ada2 devices
removed.

Warner

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<div dir=3D"ltr"><div dir=3D"ltr"><br></div><br><div class=3D"gmail_quote">=
<div dir=3D"ltr" class=3D"gmail_attr">On Tue, Nov 28, 2023 at 12:51=E2=80=
=AFPM Miroslav Lachman &lt;<a href=3D"mailto:000.fbsd@quip.cz">000.fbsd@qui=
p.cz</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"mar=
gin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1=
ex">I have strange problem on one of my machines - the disk devices in /dev=
/ <br>
are only shown as ada0 and ada1 but no partition devices, no devices in <br=
>
/dev/gpt/ or /dev/gptid/, these directories are completely missing even <br=
>
though there are GPT labels.<br>
This is FreeBSD 13.2-RELEASE-p5 amd64 on HP Microserver Gen8. Disk are 2 <b=
r>
Seagate NAS 4TB, manually partitioned with gpart utility, zpool created <br=
>
and then all the date migrated by zfs send and zfs receive from old 2TB <br=
>
disks. Everything works, system is running but device nodes in /dev/ are <b=
r>
missing. I noticed this only when I want to create gmirrored swap from <br>
ada0p4 and ada1p4 but got &quot;No such file or directory.&quot;<br>
<br>
There are only diskid style devices in /dev/diskid/<br>
<br>
gpart show -l shows correct GPT labels for partitions<br>
<br>
# gpart show -l<br>
=3D&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 40=C2=A0 7814037088=C2=A0 diskid/DISK-Z3=
010G8V=C2=A0 GPT=C2=A0 (3.6T)<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A040=C2=A0 =C2=A0 =C2=A0 =C2=A0 1024=
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A01=C2=A0 bootG8V=C2=A0 (512K)<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A01064=C2=A0 =C2=A0 =C2=A0 =C2=A040960=C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A02=
=C2=A0 efiG8V=C2=A0 (20M)<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 42024=C2=A0 =C2=A0 83886080=C2=A0 =C2=A0 =C2=A0=
 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A03=C2=A0 diskG8Vsys=
=C2=A0 (40G)<br>
=C2=A0 =C2=A0 =C2=A083928104=C2=A0 =C2=A0 20971520=C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A04=C2=A0 swapG8V=C2=A0 (=
10G)<br>
=C2=A0 =C2=A0 104899624=C2=A0 7707033600=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A05=C2=A0 diskG8Vtank0=C2=A0 (3.6T)<=
br>
=C2=A0 =C2=A07811933224=C2=A0 =C2=A0 =C2=A02103904=C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 - free -=C2=A0 =
(1.0G)<br>
<br>
=3D&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 40=C2=A0 7814037088=C2=A0 diskid/DISK-Z3=
02YC90=C2=A0 GPT=C2=A0 (3.6T)<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A040=C2=A0 =C2=A0 =C2=A0 =C2=A0 1024=
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A01=C2=A0 bootC90=C2=A0 (512K)<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A01064=C2=A0 =C2=A0 =C2=A0 =C2=A040960=C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A02=
=C2=A0 efiC90=C2=A0 (20M)<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 42024=C2=A0 =C2=A0 83886080=C2=A0 =C2=A0 =C2=A0=
 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A03=C2=A0 diskC90sys=
=C2=A0 (40G)<br>
=C2=A0 =C2=A0 =C2=A083928104=C2=A0 =C2=A0 20971520=C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A04=C2=A0 swapC90=C2=A0 (=
10G)<br>
=C2=A0 =C2=A0 104899624=C2=A0 7707033600=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A05=C2=A0 diskC90tank0=C2=A0 (3.6T)<=
br>
=C2=A0 =C2=A07811933224=C2=A0 =C2=A0 =C2=A02103904=C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 - free -=C2=A0 =
(1.0G)<br>
<br>
<br>
But gpart show -p does not show ada0p1 ada0p2 ..ada0pN, it shows diskid <br=
>
style entries<br>
<br>
# gpart show -p<br>
=3D&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 40=C2=A0 7814037088=C2=A0 =C2=A0 diskid/=
DISK-Z3010G8V=C2=A0 GPT=C2=A0 (3.6T)<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A040=C2=A0 =C2=A0 =C2=A0 =C2=A0 1024=
=C2=A0 diskid/DISK-Z3010G8Vp1=C2=A0 freebsd-boot=C2=A0 (512K)<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A01064=C2=A0 =C2=A0 =C2=A0 =C2=A040960=C2=
=A0 diskid/DISK-Z3010G8Vp2=C2=A0 efi=C2=A0 (20M)<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 42024=C2=A0 =C2=A0 83886080=C2=A0 diskid/DISK-Z=
3010G8Vp3=C2=A0 freebsd-zfs=C2=A0 (40G)<br>
=C2=A0 =C2=A0 =C2=A083928104=C2=A0 =C2=A0 20971520=C2=A0 diskid/DISK-Z3010G=
8Vp4=C2=A0 freebsd-swap=C2=A0 (10G)<br>
=C2=A0 =C2=A0 104899624=C2=A0 7707033600=C2=A0 diskid/DISK-Z3010G8Vp5=C2=A0=
 freebsd-zfs=C2=A0 (3.6T)<br>
=C2=A0 =C2=A07811933224=C2=A0 =C2=A0 =C2=A02103904=C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 - free -=
=C2=A0 (1.0G)<br>
<br>
=3D&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 40=C2=A0 7814037088=C2=A0 =C2=A0 diskid/=
DISK-Z302YC90=C2=A0 GPT=C2=A0 (3.6T)<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A040=C2=A0 =C2=A0 =C2=A0 =C2=A0 1024=
=C2=A0 diskid/DISK-Z302YC90p1=C2=A0 freebsd-boot=C2=A0 (512K)<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A01064=C2=A0 =C2=A0 =C2=A0 =C2=A040960=C2=
=A0 diskid/DISK-Z302YC90p2=C2=A0 efi=C2=A0 (20M)<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 42024=C2=A0 =C2=A0 83886080=C2=A0 diskid/DISK-Z=
302YC90p3=C2=A0 freebsd-zfs=C2=A0 (40G)<br>
=C2=A0 =C2=A0 =C2=A083928104=C2=A0 =C2=A0 20971520=C2=A0 diskid/DISK-Z302YC=
90p4=C2=A0 freebsd-swap=C2=A0 (10G)<br>
=C2=A0 =C2=A0 104899624=C2=A0 7707033600=C2=A0 diskid/DISK-Z302YC90p5=C2=A0=
 freebsd-zfs=C2=A0 (3.6T)<br>
=C2=A0 =C2=A07811933224=C2=A0 =C2=A0 =C2=A02103904=C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 - free -=
=C2=A0 (1.0G)<br>
<br>
<br>
# gpart list | grep label<br>
=C2=A0 =C2=A0 label: bootG8V<br>
=C2=A0 =C2=A0 label: efiG8V<br>
=C2=A0 =C2=A0 label: diskG8Vsys<br>
=C2=A0 =C2=A0 label: swapG8V<br>
=C2=A0 =C2=A0 label: diskG8Vtank0<br>
=C2=A0 =C2=A0 label: bootC90<br>
=C2=A0 =C2=A0 label: efiC90<br>
=C2=A0 =C2=A0 label: diskC90sys<br>
=C2=A0 =C2=A0 label: swapC90<br>
=C2=A0 =C2=A0 label: diskC90tank0<br>
<br>
<br>
# ll /dev/gpt/<br>
ls: /dev/gpt/: No such file or directory<br>
<br>
<br>
# ll /dev/ada*<br>
crw-r-----=C2=A0 1 root=C2=A0 operator=C2=A0 =C2=A00x73 Nov 27 00:00 /dev/a=
da0<br>
crw-r-----=C2=A0 1 root=C2=A0 operator=C2=A0 =C2=A00x81 Nov 27 00:00 /dev/a=
da1<br>
<br>
<br>
Sysctl seems normal to me.<br>
<br>
# sysctl kern.geom.label<br>
kern.geom.label.disk_ident.enable: 1<br>
kern.geom.label.gptid.enable: 1<br>
kern.geom.label.gpt.enable: 1<br>
kern.geom.label.ufs.enable: 1<br>
kern.geom.label.ufsid.enable: 1<br>
kern.geom.label.reiserfs.enable: 1<br>
kern.geom.label.ntfs.enable: 1<br>
kern.geom.label.msdosfs.enable: 1<br>
kern.geom.label.iso9660.enable: 1<br>
kern.geom.label.flashmap.enable: 1<br>
kern.geom.label.ext2fs.enable: 1<br>
kern.geom.label.debug: 0<br>
<br>
<br>
This is the only way I can access disk partitions<br>
<br>
# ll /dev/diskid/<br>
total 0<br>
crw-r-----=C2=A0 1 root=C2=A0 operator=C2=A0 =C2=A00x7f Nov 27 00:00 DISK-Z=
3010G8V<br>
crw-r-----=C2=A0 1 root=C2=A0 operator=C2=A0 =C2=A00x99 Nov 27 00:00 DISK-Z=
3010G8Vp1<br>
crw-r-----=C2=A0 1 root=C2=A0 operator=C2=A0 =C2=A00x9b Nov 27 00:00 DISK-Z=
3010G8Vp2<br>
crw-r-----=C2=A0 1 root=C2=A0 operator=C2=A0 =C2=A00x9d Nov 27 00:00 DISK-Z=
3010G8Vp3<br>
crw-r-----=C2=A0 1 root=C2=A0 operator=C2=A0 =C2=A00x9f Nov 27 00:00 DISK-Z=
3010G8Vp4<br>
crw-r-----=C2=A0 1 root=C2=A0 operator=C2=A0 =C2=A00xa1 Nov 27 00:00 DISK-Z=
3010G8Vp5<br>
crw-r-----=C2=A0 1 root=C2=A0 operator=C2=A0 =C2=A00xad Nov 27 00:00 DISK-Z=
302YC90<br>
crw-r-----=C2=A0 1 root=C2=A0 operator=C2=A0 =C2=A00xc5 Nov 27 00:00 DISK-Z=
302YC90p1<br>
crw-r-----=C2=A0 1 root=C2=A0 operator=C2=A0 =C2=A00xc7 Nov 27 00:00 DISK-Z=
302YC90p2<br>
crw-r-----=C2=A0 1 root=C2=A0 operator=C2=A0 =C2=A00xc9 Nov 27 00:00 DISK-Z=
302YC90p3<br>
crw-r-----=C2=A0 1 root=C2=A0 operator=C2=A0 =C2=A00xcb Nov 27 00:00 DISK-Z=
302YC90p4<br>
crw-r-----=C2=A0 1 root=C2=A0 operator=C2=A0 =C2=A00xcd Nov 27 00:00 DISK-Z=
302YC90p5<br>
<br>
<br>
I created two pools (sys and tank1) with adaN devices when there were 4 <br=
>
disks and the system was booted from USB flash drive with FreeBSD 13.2; <br=
>
current ada0 was ada2 and current ada1 was ada3.<br>
<br>
These commands were used<br>
<br>
# zpool create -m none sys mirror ada2p3 ada3p3<br>
<br>
# zpool create -m none tank1 mirror ada2p5 ada3p5<br>
<br>
But now, when the system is booted of these disks, they are reported <br>
only by diskids.<br>
<br>
# zpool list -v<br>
NAME=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0SIZE=C2=A0 ALLOC=C2=A0 =C2=A0FREE=C2=A0 CKPOINT=C2=A0 E=
XPANDSZ <br>
FRAG=C2=A0 =C2=A0 CAP=C2=A0 DEDUP=C2=A0 =C2=A0 HEALTH=C2=A0 ALTROOT<br>
sys=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A039.5G=C2=A0 15.9G=C2=A0 23.6G=C2=A0 =C2=A0 =C2=A0 =C2=
=A0 -=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0- <br>
12%=C2=A0 =C2=A0 40%=C2=A0 1.00x=C2=A0 =C2=A0 ONLINE=C2=A0 -<br>
=C2=A0 =C2=A0mirror-0=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 39.5G=C2=A0 15.9G=C2=A0 23.6G=C2=A0 =C2=A0 =C2=A0 =C2=A0 -=C2=A0=
 =C2=A0 =C2=A0 =C2=A0 =C2=A0- <br>
12%=C2=A0 40.2%=C2=A0 =C2=A0 =C2=A0 -=C2=A0 =C2=A0 ONLINE<br>
=C2=A0 =C2=A0 =C2=A0diskid/DISK-Z3010G8Vp3=C2=A0 =C2=A0 40G=C2=A0 =C2=A0 =
=C2=A0 -=C2=A0 =C2=A0 =C2=A0 -=C2=A0 =C2=A0 =C2=A0 =C2=A0 -=C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0- <br>
-=C2=A0 =C2=A0 =C2=A0 -=C2=A0 =C2=A0 =C2=A0 -=C2=A0 =C2=A0 ONLINE<br>
=C2=A0 =C2=A0 =C2=A0diskid/DISK-Z302YC90p3=C2=A0 =C2=A0 40G=C2=A0 =C2=A0 =
=C2=A0 -=C2=A0 =C2=A0 =C2=A0 -=C2=A0 =C2=A0 =C2=A0 =C2=A0 -=C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0- <br>
-=C2=A0 =C2=A0 =C2=A0 -=C2=A0 =C2=A0 =C2=A0 -=C2=A0 =C2=A0 ONLINE<br>
tank1=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A03.58T=C2=A0 1.22T=C2=A0 2.36T=C2=A0 =C2=A0 =C2=A0 =C2=A0 -=C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0- <br>
0%=C2=A0 =C2=A0 34%=C2=A0 1.00x=C2=A0 =C2=A0 ONLINE=C2=A0 -<br>
=C2=A0 =C2=A0mirror-0=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 3.58T=C2=A0 1.22T=C2=A0 2.36T=C2=A0 =C2=A0 =C2=A0 =C2=A0 -=C2=A0=
 =C2=A0 =C2=A0 =C2=A0 =C2=A0- <br>
0%=C2=A0 34.0%=C2=A0 =C2=A0 =C2=A0 -=C2=A0 =C2=A0 ONLINE<br>
=C2=A0 =C2=A0 =C2=A0diskid/DISK-Z3010G8Vp5=C2=A0 3.59T=C2=A0 =C2=A0 =C2=A0 =
-=C2=A0 =C2=A0 =C2=A0 -=C2=A0 =C2=A0 =C2=A0 =C2=A0 -=C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0- <br>
-=C2=A0 =C2=A0 =C2=A0 -=C2=A0 =C2=A0 =C2=A0 -=C2=A0 =C2=A0 ONLINE<br>
=C2=A0 =C2=A0 =C2=A0diskid/DISK-Z302YC90p5=C2=A0 3.59T=C2=A0 =C2=A0 =C2=A0 =
-=C2=A0 =C2=A0 =C2=A0 -=C2=A0 =C2=A0 =C2=A0 =C2=A0 -=C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0- <br>
-=C2=A0 =C2=A0 =C2=A0 -=C2=A0 =C2=A0 =C2=A0 -=C2=A0 =C2=A0 ONLINE<br>
<br>
<br>
I did similar setup and migration many times and never seen this problem.<b=
r>
<br>
What can be wrong with this system?<br></blockquote><div><br></div><div>The=
 problem is a geom design point. When you have multiple aliases that you ca=
n open, the others are removed from the filesystem view when one is opened.=
 It looks like from the above that the mirror-0 was created with the diskid=
, so that&#39;s the device that zfs opens, leaving the ada2 devices removed=
.</div><div><br></div><div>Warner</div></div></div>

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