** Description changed: + [Impact] + Users installing with a USB key attached to the installing system, or adding a USB key on an installed system with multipath enabled will see the USB devices picked up by multipath. This is confusing because it changes the paths required to be used to access/mount/format the USB drives to paths under /dev/mapper, with mpath names. + + [Test Case] + 1) Attach a USB key on a system with multipath enabled; either from the installer (booting the installer with USB attached), or on an installed system. + 2) See that the device is picked up by multipath-tools and shows up in the output of 'multipath -ll' and under /dev/mapper with the same name as provided by multipath -ll. + + [Regression Potential] + Some USB 3.0 devices *can* support multipath; users of such custom configurations will see USB devices not being considered as multipath devices. Other devices which should be considered as multipathed may not be picked up anymore. + + ---- + On a system with a multipath configuration, multipath bindings are being created for removable(USB) drives rendering them inaccessible as normal removable drives. in this case, the usb drive is detected as /dev/sdi: # lsblk|grep -A2 sdi - sdi 8:128 1 14.7G 0 disk - ├─sdi1 8:129 1 14.7G 0 part - └─mpath4 (dm-9) 252:9 0 14.7G 0 mpath - └─mpath4-part1 (dm-10) 252:10 0 14.7G 0 part + sdi 8:128 1 14.7G 0 disk + ├─sdi1 8:129 1 14.7G 0 part + └─mpath4 (dm-9) 252:9 0 14.7G 0 mpath + └─mpath4-part1 (dm-10) 252:10 0 14.7G 0 part - # cat /etc/multipath/bindings + # cat /etc/multipath/bindings # This file was created by curtin while installing the system. mpath0 1IBM IPR-0 5EC2590000000080 # End of content generated by curtin. # Everything below is maintained by multipath subsystem. mpath1 1IBM IPR-0 5EC2590000000060 mpath2 1IBM IPR-0 5EC2590000000040 mpath3 1IBM IPR-0 5EC2590000000020 - mpath4 1ADATA USB Flash Drive + mpath4 1ADATA USB Flash Drive Upon trying to format /dev/sdi1: # mkfs.ext4 /dev/sdi1 mke2fs 1.42.9 (4-Feb-2014) /dev/sdi1 is apparently in use by the system; will not make a filesystem here! ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: multipath-tools 0.4.9-3ubuntu7.2 ProcVersionSignature: User Name 3.16.0-41.55~14.04.1-generic 3.16.7-ckt11 Uname: Linux 3.16.0-41-generic ppc64le ApportVersion: 2.14.1-0ubuntu3.10 Architecture: ppc64el Date: Thu Jun 25 20:44:13 2015 ProcEnviron: - TERM=screen - PATH=(custom, no user) - XDG_RUNTIME_DIR=<set> - LANG=en_US.UTF-8 - SHELL=/bin/bash + TERM=screen + PATH=(custom, no user) + XDG_RUNTIME_DIR=<set> + LANG=en_US.UTF-8 + SHELL=/bin/bash SourcePackage: multipath-tools UpgradeStatus: No upgrade log present (probably fresh install)
-- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to multipath-tools in Ubuntu. https://bugs.launchpad.net/bugs/1468897 Title: multipath creates binding for Removable(USB) drives To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/multipath-tools/+bug/1468897/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
