Date: Sat, 30 Nov 2019 14:08:11 +0000 From: John F Carr <jfc@mit.edu> To: "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org> Subject: Very slow disk access using USB-SATA adapter on Pi 3 B+ Message-ID: <D695F51F-472A-4AD2-9152-8233AB91CA19@exchange.mit.edu>
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I have a Raspberry Pi 3 B+ connected to a pair of drives via a USB to SATA =
adapter. They worked fine on another arm64 system running then-CURRENT ear=
ly this year, but now the drive is extremely slow on this week's CURRENT. =
I'm getting about 1 transfer per second through the filesystem. dd from th=
e disk device moved about 64 kilobytes per second.
Sound familiar? Any clues in the dmesg fragment below?
The slow drive is da1. I'm not using da0. That USB_ERR_STALLED doesn't lo=
ok good. The adapter gives the drives fake serial numbers which are identi=
cal. No problem 8 months ago but maybe it is now.
FreeBSD 13.0-CURRENT #0 r355121: Wed Nov 27 07:50:23 UTC 2019
root@releng1.nyi.freebsd.org:/usr/obj/usr/src/arm64.aarch64/sys/GENERIC=
arm64
FreeBSD clang version 9.0.0 (tags/RELEASE_900/final 372316) (based on LLVM =
9.0.0)
WARNING: WITNESS option enabled, expect reduced performance.
[...]
usbus0 on bcm283x_dwcotg0
[...]
usbus0: 480Mbps High Speed USB v2.0
[...]
ugen0.8: <VIA Labs, Inc. USB2.0 Hub> at usbus0
uhub4 on uhub1
uhub4: <VIA Labs, Inc. USB2.0 Hub, class 9/0, rev 2.10/90.40, addr 8> on us=
bus0
uhub4: 4 ports with 4 removable, self powered
ugen0.9: <asmedia ASMT1053E> at usbus0
umass0 on uhub4
umass0: <asmedia ASMT1053E, class 0/0, rev 2.10/1.00, addr 9> on usbus0
umass0: SCSI over Bulk-Only; quirks =3D 0x0100
umass0:0:0: Attached to scbus0
da0 at umass-sim0 bus 0 scbus0 target 0 lun 0
da0: <ASMT 2105 0> Fixed Direct Access SPC-4 SCSI device
da0: Serial Number 123456789012
da0: 40.000MB/s transfers
da0: 3815447MB (7814037168 512 byte sectors)
da0: quirks=3D0x2<NO_6_BYTE>
ue0: link state changed to UP
ugen0.10: <asmedia ASMT1053E> at usbus0
umass1 on uhub4
umass1: <asmedia ASMT1053E, class 0/0, rev 2.10/1.00, addr 10> on usbus0
umass1: SCSI over Bulk-Only; quirks =3D 0x0100
umass1:1:1: Attached to scbus1
uhub_reattach_port: device problem (USB_ERR_STALLED), disabling port 3
da1 at umass-sim1 bus 1 scbus1 target 0 lun 0
da1: <ASMT 2105 0> Fixed Direct Access SPC-4 SCSI device
da1: Serial Number 123456789012
da1: 40.000MB/s transfers
da1: 3815447MB (7814037168 512 byte sectors)
da1: quirks=3D0x2<NO_6_BYTE>
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