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Having upgraded from Jammy to Kinetic I now find that fstrim no longer
works on SSD drives in some external USB enclosures.
The issue is caused by the provisioning_mode status for these now being
set to disabled, whereas previously they were set to unmap.
Oddly(?) this only occurs on hot-plugging. I have two of these "permanently"
plugged in to one system (so there at boot time) and these still show up as
unmap.
But if I plug in a third enclosure (same chipset, same SSD model, same SSD
firmware version as the second one) it shows up as disabled.
==========
root@benuc:~# lsusb
Bus 002 Device 003: ID 152d:0578 JMicron Technology Corp. / JMicron USA
Technology Corp. JMS578 SATA 6Gb/s
Bus 002 Device 002: ID 152d:0578 JMicron Technology Corp. / JMicron USA
Technology Corp. JMS578 SATA 6Gb/s
Bus 002 Device 004: ID 152d:0578 JMicron Technology Corp. / JMicron USA
Technology Corp. JMS578 SATA 6Gb/s
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 002: ID 8087:0aaa Intel Corp. Bluetooth 9460/9560 Jefferson Peak
(JfP)
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
root@benuc:~# cd /sys/
/sys
root@benuc:/sys# find -name provisioning_mode
./devices/pci0000:00/0000:00:17.0/ata2/host1/target1:0:0/1:0:0:0/scsi_disk/1:0:0:0/provisioning_mode
./devices/pci0000:00/0000:00:17.0/ata3/host2/target2:0:0/2:0:0:0/scsi_disk/2:0:0:0/provisioning_mode
./devices/pci0000:00/0000:00:14.0/usb2/2-3/2-3:1.0/host3/target3:0:0/3:0:0:0/scsi_disk/3:0:0:0/provisioning_mode
./devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4:1.0/host4/target4:0:0/4:0:0:0/scsi_disk/4:0:0:0/provisioning_mode
./devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host5/target5:0:0/5:0:0:0/scsi_disk/5:0:0:0/provisioning_mode
root@benuc:/sys# cat
./devices/pci0000:00/0000:00:14.0/usb2/2-3/2-3:1.0/host3/target3:0:0/3:0:0:0/scsi_disk/3:0:0:0/provisioning_mode
unmap
root@benuc:/sys# cat
./devices/pci0000:00/0000:00:14.0/usb2/2-4/2-4:1.0/host4/target4:0:0/4:0:0:0/scsi_disk/4:0:0:0/provisioning_mode
unmap
root@benuc:/sys# cat
./devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0/host5/target5:0:0/5:0:0:0/scsi_disk/5:0:0:0/provisioning_mode
disabled
==========
(Ignore the ata entries - those are internal drives).
If I reboot the system using the old, kept Jammy kernel
(5.15.0-52-generic) the hot-plug shows up as unmap again.
It's the 5.19.0-2?-generic Kinetic kernels which seem to be causing the
problem.
I do have a workaround of providing my own udev rule:
ACTION=="add|change", ATTRS{idVendor}=="152d", ATTRS{idProduct}=="0578",
SUBSYSTEM=="scsi_disk", ATTR{provisioning_mode}="unmap"
which is something I've had to do anyway for some other ASMedia chipsets
which do work, but don't get set to unmap by default - 174c:55aa and
174c:235c.
** Affects: linux-hwe-6.5 (Ubuntu)
Importance: Undecided
Status: Confirmed
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fstrim no longer working on some external USB enclosures
https://bugs.launchpad.net/bugs/1998543
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which is subscribed to linux-hwe-6.5 in Ubuntu.
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