** Changed in: linux (Ubuntu Bionic)
Status: In Progress => Won't Fix
** Changed in: linux (Ubuntu Cosmic)
Status: In Progress => Won't Fix
** Changed in: linux (Ubuntu Xenial)
Status: New => Won't Fix
** Description changed:
[Impact]
SATA disks may be unusable
will not be usable when:
- The disk is connected through a SAS expander
- Controller uses a libsas-based driver (mvsas, aic94xx, hisi_sas)
- link rate between expander & disk is greater than link between controller
and expander
+ This is unlikely to occur in any production environment, but has
+ occurred in early silicon testing. Fixing this would be helpful in those
+ environments.
+
[Test Case]
See conditions in "Impact"
Can be simulated with:
for f in /sys/class/sas_phy/phy-1\:*/maximum_linkrate; do
- echo "3.0 Gbit" | sudo tee $f
+ echo "3.0 Gbit" | sudo tee $f
done
[Fix]
cec9771d2e954 scsi: libsas: Support SATA PHY connection rate unmatch fixing
during discovery
[Regression Risk]
Impact is restricted to drivers that use libsas: mvsas, aic94xx & hisi_sas.
Code change is all within an "if" statement that meets these restrictions.
A bug in this code could possibly reduce the speed of an otherwise working
disk connection.
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1821408
Title:
scsi: libsas: Support SATA PHY connection rate unmatch fixing during
discovery
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1821408/+subscriptions
--
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
