Difference between revisions of "Device mapper"
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| + | [[wikipedia:Device mapper]] | ||
| + | /dev/[[mapper]]/ | ||
| + | /dev/[[mapper]]/control | ||
| − | * <code>ls -lrt /dev/mapper</code> | + | * <code>ls -lrt [[/dev/]]mapper/</code> |
| + | |||
| + | * <code>[[dmsetup ls]]</code> | ||
:<code>[[vgchange]] -a|--activate y|n|ay</code> | :<code>[[vgchange]] -a|--activate y|n|ay</code> | ||
| − | :The block device for the LV is added or removed from the system using [[device-mapper]] in the kernel | + | :The block device for the LV is added or removed from the system using [[device-mapper]] in the kernel. A symbolic link /dev/VGName/LVName pointing to the device node is also added/removed. |
| + | |||
| + | |||
| + | vgchange -a n VG_NAME | ||
| + | 0 logical volume(s) in volume group "VG_NAME" now active | ||
| + | vgchange -a y VG_NAME | ||
| + | 1 logical volume(s) in volume group "VG_NAME" now active | ||
| + | |||
| + | |||
| + | |||
| + | |||
| + | == Related terms == | ||
| + | * <code>[[multipath -l]]</code> (show the current multipath topology from information fetched in [[sysfs]] and the device mapper) | ||
| + | * <code>[[/etc/fstab]]</code> | ||
| + | * <code>[[dm verity]]</code> | ||
| + | * <code>[[dm mpath]]</code> | ||
| + | * <code>[[resize2fs]]</code> | ||
== Activities == | == Activities == | ||
| Line 16: | Line 37: | ||
== See also == | == See also == | ||
| + | * {{kpartx}} | ||
| + | * {{dmsetup}} | ||
* {{Linux Fibre Channel}} | * {{Linux Fibre Channel}} | ||
| − | + | * {{LVM}} | |
[[Category:Linux]] | [[Category:Linux]] | ||
Latest revision as of 09:01, 14 February 2023
/dev/mapper/ /dev/mapper/control
ls -lrt /dev/mapper/
vgchange -a|--activate y|n|ay- The block device for the LV is added or removed from the system using device-mapper in the kernel. A symbolic link /dev/VGName/LVName pointing to the device node is also added/removed.
vgchange -a n VG_NAME 0 logical volume(s) in volume group "VG_NAME" now active vgchange -a y VG_NAME 1 logical volume(s) in volume group "VG_NAME" now active
Related terms[edit]
multipath -l(show the current multipath topology from information fetched in sysfs and the device mapper)/etc/fstabdm veritydm mpathresize2fs
Activities[edit]
- Read Configuring Device Mapper Multipath RHEL 8 https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html-single/configuring_device_mapper_multipath/index
Related
See also[edit]
kpartx- Device mapper:
dmsetup,dmsetup ls, LVM,/dev/mapper/,vgcreate - Fibre Channel: HBA,
multipath-tools,multipath,multipath -ll,/etc/multipath.confmultipathdrescan-scsi-bus.shpowermtDevice mapperdmsetup ls, - LVM: LVM errors LVM scan commands
lkvmetad, Add a new disk
- scan:
pvscanvgscan - LVM:
lvslvmscanlvm fullreportlvmreportlvmconfiglvmdumplvmchecklvm dumpconfig - Scan:
pvsvgslvspvscanvgscan - PV:
pvcreatepvremovepvscanpvremovepvscanpvspvchangepvckpvdisplaypvresize - LV:
lvdisplaylvcreatelvremove,lvresize,lvextend,lvreduce,lvrename - VG:
vgdisplay,vgcreate,vgremove,vgextend,vgreduce,vgscan,vgchange,vgrename,vgcfgbackup,vgcfgrestore,vgimportclone,vgck - Check commands:
pvckvgck
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