I have this same problem for some time and on the latest update too.
all of the discs affected are used in a zfs zpool.
uname -a
Linux PEI-Server 4.15.0-45-generic #48~16.04.1-Ubuntu SMP Tue Jan 29 18:03:48
UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
cat /sys/module/zfs/version
0.7.5-1ubuntu16.4
I have a total of 6 discs split equally across 2 esata port multipliers.
All are part a a single raidz2 pool.
Zillions of these errors:
Mar 3 22:04:48 PEI-Server systemd[1]:
dev-disk-by\x2dpath-pci\x2d:07:00.0\x2data\x2d1\x2dpart1.device: Dev
dev-disk-by\x2dpath-pci\x2d:07:00.0\x2data\x2d1\x2dpart1.device appeared
twice with different sysfs paths
/sys/devices/pci:00/:00:1c.2/:07:00.0/ata3/host2/target2:0:0/2:0:0:0/block/sdd/sdd1
and
/sys/devices/pci:00/:00:1c.2/:07:00.0/ata3/host2/target2:1:0/2:1:0:0/block/sde/sde1
I have lots of detailed data if anyone wants to see it.
It would REALLY be nice if a fix trickled down soon...
thanks
rich
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https://bugs.launchpad.net/bugs/1611945
Title:
/dev/disk/by-path not properly populated for (e)SATA port multiplier
disks
Status in systemd package in Ubuntu:
Confirmed
Bug description:
We have a just-installed Ubuntu 16.04 LTS machine with a number of
disks behind port-multiplier eSATA ports, all of them driven by a SiI
3124 controller (sata_sil24 kernel driver). Our machine sees all disks
on all channels, however under 16.04 only one disk from each channel
shows up in /dev/disk/by-path/ (all disks show up in /dev/disk/by-id
and /dev/disk/by-uuid). For our usage this is a severe defect because
we rotate disks in and out of the external enclosure and rely on
mounting specific slots in the external enclosure through /dev/disk
/by-path.
This did not happen in Ubuntu 12.04 LTS, the release that this machine
was previously running.
According to 'udevadm info --export-db' and 'udevadm test-builtin
path_id' and so on, systemd's udev stuff is assigning all drives
behind the same port the same disk/by-path data (ID_PATH et al). In
'udevadm info /sys/block/sdX', the 'P:' and 'E: DEVPATH=' values show
a difference in the target portion of PCI path, eg:
P:
/devices/pci:00/:00:01.0/:01:00.0/:02:00.0/ata1/host0/target0:0:0/0:0:0:0/block/sda
P:
/devices/pci:00/:00:01.0/:01:00.0/:02:00.0/ata1/host0/target0:1:0/0:1:0:0/block/sdb
However the 'S: disk/by-path', 'E: DEVLINKS=', and 'E: ID_PATH'
portions do not. For both devices above, we see:
S: disk/by-path/pci-:02:00.0-ata-1
E: ID_PATH=pci-:02:00.0-ata-1
Naturally only one device can have a /dev/disk/by-
path/pci-:02:00.0-ata-1 symlink, so instead of four disks per
channel in /dev/disk/by-path we see one.
Ubuntu release: 16.04
Package versions from 'apt-cache policy udev systemd':
udev:
Installed: 229-4ubuntu7
systemd:
Installed: 229-4ubuntu7
'journalctl -b' reports that during boot systemd does report some
'appeared twice with different sysfs paths' notes, eg:
Aug 10 13:34:21 verdandi systemd[1]: dev-disk-by\x2dpath-
pci\x2d:02:00.0\x2data\x2d1\x2dpart1.device: Dev dev-disk-by
\x2dpath-pci\x2d:02:00.0\x2data\x2d1\x2dpart1.device appeared
twice with different sysfs paths
/sys/devices/pci:00/:00:01.0/:01:00.0/:02:00.0/ata1/host0/target0:3:0/0:3:0:0/block/sdd/sdd1
and
/sys/devices/pci:00/:00:01.0/:01:00.0/:02:00.0/ata1/host0/target0:0:0/0:0:0:0/block/sda/sda1
However it doesn't seem to be reporting this for all port-multiplier
drives and their partitions.
If it would be useful I can attach full 'udevadm info --export-db'
output or the like.
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