Have you tried "usb-storage.quirks=" [1] ?
Commit 8c4e97ddfe73a0958bb0abf7e6a3bc4cc3e04936 ("usb-storage: Add
support for FL_ALWAYS_SYNC flag in the UAS driver") also worth a try but
it's not in any released kernel yet. Need to compile a kernel by
yourself.
[1]
https://git.kernel.org/pub/scm/linu
I've just sent apport-collect information.
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1666109
Title:
Optimal I/O size isn't
apport information
** Tags added: apport-collected bionic
** Description changed:
1) Ubuntu release
Ubuntu 16.04.2 LTS x86_64 desktop
2) package name
linux-generic-hwe-16.04 (4.8.0.36.8)
3) Expected behavior
When I attached more than 3 uas devices, all uas devices would be probe
** Package changed: linux-hwe (Ubuntu) => linux (Ubuntu)
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https://bugs.launchpad.net/bugs/1666109
Title:
Optimal I/O size isn't calculated properly with uas module, and it may
make da
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This bug is still alive.
(1) I *can* attach more than three uas devices, but
(2) I/O information, which I can get from /sys/block/sd*/queue, is strange,
(3) parted and LVM can't calculate optimal disk geometries.
4 Disk attachment OK ==
[ 223.209197] usb 3-2.4
Updated in accord with RedHat bugzilla.
** Summary changed:
- failed to attach more than 3 uas devices on 16.04 LTS HWE kernel
+ Optimal I/O size isn't calculated properly with uas module, and it may make
data inconsistent on the disk and logical volume
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