Device mapper
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/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/fstab
dm verity
dm mpath
resize2fs
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.conf
multipathd
rescan-scsi-bus.sh
powermt
Device mapper
dmsetup ls
, - LVM: LVM errors LVM scan commands
lkvmetad
, Add a new disk
- scan:
pvscan
vgscan
- LVM:
lvs
lvmscan
lvm fullreport
lvmreport
lvmconfig
lvmdump
lvmcheck
lvm dumpconfig
- Scan:
pvs
vgs
lvs
pvscan
vgscan
- PV:
pvcreate
pvremove
pvscan
pvremove
pvscan
pvs
pvchange
pvck
pvdisplay
pvresize
- LV:
lvdisplay
lvcreate
lvremove
,lvresize
,lvextend
,lvreduce
,lvrename
- VG:
vgdisplay
,vgcreate
,vgremove
,vgextend
,vgreduce
,vgscan
,vgchange
,vgrename
,vgcfgbackup
,vgcfgrestore
,vgimportclone
,vgck
- Check commands:
pvck
vgck
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