** Changed in: linux (Ubuntu Disco)
Status: Fix Committed => Won't Fix
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https://bugs.launchpad.net/bugs/1817784
Title:
libsas disks can have non-unique by-path names
Status in linux package in Ubuntu:
Fix Committed
Status in linux source package in Xenial:
Fix Released
Status in linux source package in Bionic:
Fix Released
Status in linux source package in Cosmic:
Fix Released
Status in linux source package in Disco:
Won't Fix
Bug description:
[Impact]
Multiple disks in a system can end up having the same BY_PATH name, making
the corresponding symlinks in /dev/disk/by-path non-unique. This can result in
a user performing an operation on the wrong disk, possibly resulting in data
loss.
[Test Case]
$ ls -l /dev/disk/by-path/
total 0
lrwxrwxrwx 1 root root 9 Feb 13 12:26
platform-HISI0162:01-sas-exp0x500e004aaaaaaa1f-phy0-lun-0 -> ../../sdb
lrwxrwxrwx 1 root root 10 Feb 13 12:26
platform-HISI0162:01-sas-exp0x500e004aaaaaaa1f-phy0-lun-0-part1 -> ../../sdb1
lrwxrwxrwx 1 root root 10 Feb 13 12:26
platform-HISI0162:01-sas-exp0x500e004aaaaaaa1f-phy0-lun-0-part2 -> ../../sdb2
lrwxrwxrwx 1 root root 10 Feb 13 12:26
platform-HISI0162:01-sas-exp0x500e004aaaaaaa1f-phy0-lun-0-part3 -> ../../sdc3
Notice that there is no symlink for /dev/sdc.
[Fix]
ffeafdd2bf0b2 scsi: libsas: Fix rphy phy_identifier for PHYs with end devices
attached
[Regression Risk]
This may change the by-path symlinks for disks on the system. While the new
name would be the correct one - users maybe relying on the incorrect version.
This could result in an unbootable system, requiring manual intervention to
repair.
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