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Questions tagged [udev]

106 questions
27
votes
2 answers

Why is my eth0 called eno16777736?

I've seen http://www.freedesktop.org/wiki/Software/systemd/PredictableNetworkInterfaceNames/, which describes the rationale for consistent/predictable device naming, and then the rules by which device names are generated: * Two character prefixes…
Dmitry Minkovsky
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14
votes
1 answer

Why did rebooting cause one side of my ZFS mirror to become UNAVAIL?

I just recently migrated a bulk data storage pool (ZFS On Linux 0.6.2, Debian Wheezy) from a single-device vdev configuration to a two-way mirror vdev configuration. The previous pool configuration was: NAME STATE READ…
user
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7
votes
3 answers

How to determine "Predictable Name" of network interface

I am setting up a new server and installed Ubuntu Bionic, which uses Predictable Network Interface Names. The installer is running on a rescue system, which still uses old interface names like eth0, eth1, but the newly installed system has…
pymkin
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7
votes
4 answers

mdadm software RAID isn't assembled at boot during initramfs stage

First, I prefer to mention I've found and read this. I'm running Debian Jessie with a standard 3.16 kernel. I've manually defined a RAID1 array. But it is not assembled automatically at boot time. And thus, systemd falls back to some degraded shell…
Sun Wukong
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6
votes
1 answer

udev rule not applied on boot for mounted disk

I'm trying to persist a readahead rule on a mounted drive to use with mongodb. The mount is persisted using /etc/fstab and that works as expected. I have added a udev rule ACTION=="add", KERNEL=="sdb", ATTR{bdi/read_ahead_kb}="16"in…
datacarl
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6
votes
4 answers

location of 70-persistent-net.rules in Centos 7

Please, give me a clue, where it's located? it's not under /etc/udev/rules.d anymore # find / -name "*persistent-net.rules" didn't find anything...
Shirker
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6
votes
3 answers

Ubuntu: disable udev's persistent-net-generator.rules

I'm using Ubuntu 12.04 LTS server edition and I am modifying /etc/udev/rules.d/70-persistent-net.rules to define my own mappings of ethernet interfaces to MAC addresses; that file is initially generated by rules in…
Luke404
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6
votes
2 answers

Ubuntu Hardy : Testing for environment variables in udev rules doesn't seem to work

I have a Ubuntu 8.04 LTS (server edition), and I need to write a udev rule for it to act upon plugging a USB thumb drive. However, I need a different action depending on the filesystem of the drive. I know I can use the ID_FS_TYPE environment…
Fred
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6
votes
4 answers

How do you specify static mount points for removable usb drives?

I have a bunch of usb ports and hubs. When you attach usb thumb drives, Linux assigns them to virtual block devices on a first-come first-serve basis. It creates sdd, sde, sdf, and so on, regardless of which port I plug the drives into. We copy…
Nick
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5
votes
1 answer

Calling lvcreate from inside the container hangs

I run a container. It has all the capabilities and mounts all the directories from root (except /proc). When I call lvcreate from inside of it I get: # lvcreate -v -L104857600B -n vol1 default Finding volume group "default" Archiving volume group…
zefciu
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5
votes
0 answers

udev attribute cannot be set on boot

I'm setting up SR-IOV for my Intel I350 igb on CentOS 6.6 (2.6.32-504.el6.x86_64, udev 147) using udev. I have modified a rule I used in CentOS 7 (3.10.0-123.el7.x86_64, udev 208). When I do "udevadm test" on CentOS 6.6, the rule is matched…
Angelos
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5
votes
2 answers

How to write rules for persistent net names?

I know that a process generates persistent network card names based on rules found in /lib/udev/rules.d/75-persistent-net-generator.rules. I also know how to completely disable this process with a simple echo '#' >…
ndemou
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5
votes
2 answers

Boot failure with root on MD (RAID1) + LVM: udev event timing

A fresh install of Ubuntu Server 13.10 (x64) is having problems booting from its root volume located in md+lvm. I've kludged a solution for now, but I'd like to understand more about what's going on and what better solutions there might be. Since…
strix
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5
votes
1 answer

Change owner of LVM LV's device node in RHEL5

First time using serverfault, please excuse any breaches of etiquette. I've created several LVM2 logical volumes in local storage on a server, and would like one of the device nodes - not the filesystem or mount point - to be owned by a user/group…
user16002
5
votes
1 answer

How to force mdadm to use udev device names rather than /dev/sdX

The question is mostly in the title already. mdadm and /proc/mdstat insist on listing md members by their "traditional" /dev/sdX names. What I want is for them to use the newer udev device names (e.g. /dev/disk/by-path and by-id). I already changed…
UloPe
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