RPi 4B USB 3 support appears to still be broken in 13.0-RELEASE

[tech-lists]

Hi,

On Sat, Apr 17, 2021 at 01:00:17AM +0200, Robert Clausecker wrote:
>Greetings!
>
>Last time I experimented with ZFS on the RPi 4B, I noticed that
>there is a strange problem when attaching the zpool via USB 3 as
>opposed to USB 2.  When doing that, mounting root fails with
>IO errors like these:

my context: stable/13-n245205 arm64

I'm using usb3-connected zfs on rpi4/8GB with no issues. I didn't have
*exactly* your issue, but it was a while ago. In my /boot/loader.conf I
have this:

[...snip...]

# zfs, ufs, booting on rpi                                                      
vfs.root_mount_always_wait=1 # give usb time to settle before zfs               
kern.cam.boot_delay="20000" # 20s delay for usb3 spinning rust settling

[...]

disk is usb3-connected ADATA (2TB) and is powered by the pi.

I think you have zfs-on-root? mine isn't, this boots from the micro-sd.

here's part of dmesg:

[...]

run0: [HT] Enabling 802.11n
Root mount waiting for: usbus0 CAM
ugen0.4: <ADATA HD710 PRO> at usbus0
umass0 on uhub0
umass0: <ADATA HD710 PRO, class 0/0, rev 3.00/92.03, addr 3> on usbus0
umass0:  SCSI over Bulk-Only; quirks = 0x8100
umass0:0:0: Attached to scbus0
Root mount waiting for: CAM
Root mount waiting for: CAM
Root mount waiting for: CAM
Root mount waiting for: CAM
Root mount waiting for: CAM
Root mount waiting for: CAM
Root mount waiting for: CAM
Root mount waiting for: CAM
Root mount waiting for: CAM
Root mount waiting for: CAM
Root mount waiting for: CAM
Root mount waiting for: CAM 
Root mount waiting for: CAM 
Root mount waiting for: CAM 
Root mount waiting for: CAM
da0 at umass-sim0 bus 0 scbus0 target 0 lun 0
da0: <ADATA HD710 PRO 9203> Fixed Direct Access SPC-4 SCSI device
da0: Serial Number [redacted]
da0: 400.000MB/s transfers
da0: 1907729MB (3907029168 512 byte sectors)
da0: quirks=0x2<NO_6_BYTE>
Warning: no time-of-day clock registered, system time will not be set accurately
Dual Console: Serial Primary, Video Secondary
ZFS filesystem version: 5
ZFS storage pool version: features support (5000)

does this help?
-- 
J.
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