lv uuid and udev uuid | is there any advantage mounting an LV by UUID instead of by path? lv uuid and udev uuid To find a UUID, simply run the blkid command. # blkid /dev/sda1 /dev/sda1 UUID="15983cac-77bc-46b1-9f79-cb180e438a64" TYPE="ext4" Your fstab now looks more .
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0 · uuid
1 · lvm
2 · linux
3 · is there any advantage mounting an LV by UUID instead of by path?
4 · [SOLVED] Why use UUIDs for lvm volumes?
5 · In /etc/fstab, what's the difference between "/dev/disk/by
6 · How to mount new logical volume (adding to fstab and mtab)?
7 · How To Use UUID To Mount Partitions / Volumes Under Ubuntu
8 · Best Practice for Mounting an LVM Logical Volume with /etc/fstab
9 · Automount LVM logical volume with a udev rule and udisks2
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Forgetting whatever reason you renamed the vg or lv, the action would screw up your mounts and exports. LVUUID remains persistent through vg and lv rename commands. It may be good to . To my mind udev rules seems to be appropriate to assert drive presence and set UDISKS_AUTO for the given partition so udisks2 can automount the partition. Therefore I .
Yes, you can use UUIDs, but remember that mount looks for entries in /dev/disk/by-uuid/ (see man mount), which are symlinks to the device files. The symlinks are created by udev (find the . The recommended setup is to use tags (e.g. UUID=uuid) rather than /dev/disk/by-{label,uuid,id,partuuid,partlabel} udev symlinks in the /etc/fstab file. Tags are more readable, .I have two HDD's in my server, both 250gig. They both have ubuntu installed, one is currently booted. I want to mount the second (old) drive to /mnt/external. If I mount through /dev/disk/by . To find a UUID, simply run the blkid command. # blkid /dev/sda1 /dev/sda1 UUID="15983cac-77bc-46b1-9f79-cb180e438a64" TYPE="ext4" Your fstab now looks more .
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If using XFS file system, a -U option provides similar functionality, but with a different keyword: xfs_admin -U generate. Either way, use the new UUID as the snapshot's . there are good reasons to not use UUIDs as well. mounting by UUID will scan across all devices looking for that UUID, as a result it will wake drives up from standby. it may . To probe the Linux filesystem type and read label and uuid for /dev/sdb2 (or any other device) use the vol_id or blkid command. For example: # vol_id --uuid {/dev/device} # . I change the UUID of the PV using vgimportclone and then change the UUID of the LVM with tune2fs, no problems with those. What I'm running into is the UUID of the .
Forgetting whatever reason you renamed the vg or lv, the action would screw up your mounts and exports. LVUUID remains persistent through vg and lv rename commands. It may be good to use UUID for this reason alone, especially if you are responsible for a . To my mind udev rules seems to be appropriate to assert drive presence and set UDISKS_AUTO for the given partition so udisks2 can automount the partition. Therefore I created the following rule in its own file /etc/udev/rules.d/61-lvm-automount-lv.rules. SUBSYSTEM=="block"\ , ENV{ID_FS_UUID}==""\ , ENV{UDISKS_AUTO}="1"
Yes, you can use UUIDs, but remember that mount looks for entries in /dev/disk/by-uuid/ (see man mount), which are symlinks to the device files. The symlinks are created by udev (find the specific rule grepping for "by-uuid" in /lib/udev/rules.d/ or /etc/udev/rules.d/), so when using UUIDs you depend on udev too. – Replace gggggggg by the UUID of the volume group (vgdisplay VG_NAME) and lllllll by the UUID of the logical volume (lvdisplay VG_NAME/LV_NAME), or run the dmsetup command manually to find the UUID. I want to define a udev rule for a particular block device (or partition). I currently do it by defining a 91-my-custom-rules.rules configuration file as follows: computer:/etc/udev/rules.d # cat . The recommended setup is to use tags (e.g. UUID=uuid) rather than /dev/disk/by-{label,uuid,id,partuuid,partlabel} udev symlinks in the /etc/fstab file. Tags are more readable, robust and portable. The mount(8) command internally uses udev symlinks, so the use of symlinks in /etc/fstab has no advantage over tags.
I have two HDD's in my server, both 250gig. They both have ubuntu installed, one is currently booted. I want to mount the second (old) drive to /mnt/external. If I mount through /dev/disk/by-uuid It just mounts the boot partition, and not my actual data. To find a UUID, simply run the blkid command. # blkid /dev/sda1 /dev/sda1 UUID="15983cac-77bc-46b1-9f79-cb180e438a64" TYPE="ext4" Your fstab now looks more like this, using UUID to identify the filesystem we wish to mount:
If using XFS file system, a -U option provides similar functionality, but with a different keyword: xfs_admin -U generate. Either way, use the new UUID as the snapshot's mount entry. UUID=b6c7724e-1c58-4960-8830-bfdeb34a9f4f /mnt/example-snap ext4 defaults 0 2.
there are good reasons to not use UUIDs as well. mounting by UUID will scan across all devices looking for that UUID, as a result it will wake drives up from standby. it may be preferrable to use static names, or /dev/disk/by-uuid/X instead of UUID=x to prevent such scans from happening.Forgetting whatever reason you renamed the vg or lv, the action would screw up your mounts and exports. LVUUID remains persistent through vg and lv rename commands. It may be good to use UUID for this reason alone, especially if you are responsible for a . To my mind udev rules seems to be appropriate to assert drive presence and set UDISKS_AUTO for the given partition so udisks2 can automount the partition. Therefore I created the following rule in its own file /etc/udev/rules.d/61-lvm-automount-lv.rules. SUBSYSTEM=="block"\ , ENV{ID_FS_UUID}==""\ , ENV{UDISKS_AUTO}="1"Yes, you can use UUIDs, but remember that mount looks for entries in /dev/disk/by-uuid/ (see man mount), which are symlinks to the device files. The symlinks are created by udev (find the specific rule grepping for "by-uuid" in /lib/udev/rules.d/ or /etc/udev/rules.d/), so when using UUIDs you depend on udev too. –
Replace gggggggg by the UUID of the volume group (vgdisplay VG_NAME) and lllllll by the UUID of the logical volume (lvdisplay VG_NAME/LV_NAME), or run the dmsetup command manually to find the UUID. I want to define a udev rule for a particular block device (or partition). I currently do it by defining a 91-my-custom-rules.rules configuration file as follows: computer:/etc/udev/rules.d # cat . The recommended setup is to use tags (e.g. UUID=uuid) rather than /dev/disk/by-{label,uuid,id,partuuid,partlabel} udev symlinks in the /etc/fstab file. Tags are more readable, robust and portable. The mount(8) command internally uses udev symlinks, so the use of symlinks in /etc/fstab has no advantage over tags.
I have two HDD's in my server, both 250gig. They both have ubuntu installed, one is currently booted. I want to mount the second (old) drive to /mnt/external. If I mount through /dev/disk/by-uuid It just mounts the boot partition, and not my actual data. To find a UUID, simply run the blkid command. # blkid /dev/sda1 /dev/sda1 UUID="15983cac-77bc-46b1-9f79-cb180e438a64" TYPE="ext4" Your fstab now looks more like this, using UUID to identify the filesystem we wish to mount:
If using XFS file system, a -U option provides similar functionality, but with a different keyword: xfs_admin -U generate. Either way, use the new UUID as the snapshot's mount entry. UUID=b6c7724e-1c58-4960-8830-bfdeb34a9f4f /mnt/example-snap ext4 defaults 0 2.
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lvm
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lv uuid and udev uuid|is there any advantage mounting an LV by UUID instead of by path?
