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The following sections contain examples of operations that can be used with cloned disks:
In this example, the following commands have been used to tag some of the disks in an Hitachi TagmaStore array:
# vxdisk settag TagmaStore-USP0_28 t1=v1
# vxdisk settag TagmaStore-USP0_28 t2=v2
# vxdisk settag TagmaStore-USP0_24 t2=v2
# vxdisk settag TagmaStore-USP0_25 t1=v1
These tags can be viewed by using the vxdisk listtag command:
The following command ensures that configuration database copies and kernel log copies are maintained for all disks in the disk group mydg that are tagged as t1:
# vxdg -g mydg set tagmeta=on tag=t1 nconfig=all nlog=all
The disks for which such metadata is maintained can be seen by using this command:
TagmaStore-USP0_10 auto:cdsdisk - - online
TagmaStore-USP0_24 auto:cdsdisk mydg02 mydg online
TagmaStore-USP0_25 auto:cdsdisk mydg03 mydg online tagmeta
TagmaStore-USP0_26 auto:cdsdisk - - online
TagmaStore-USP0_27 auto:cdsdisk - - online
TagmaStore-USP0_28 auto:cdsdisk mydg01 mydg online tagmeta
Alternatively, the following command can be used to ensure that a copy of the metadata is kept with a disk:
# vxdisk set TagmaStore-USP0_25 keepmeta=always
TagmaStore-USP0_10 auto:cdsdisk - - online
TagmaStore-USP0_22 auto:cdsdisk - - online
TagmaStore-USP0_23 auto:cdsdisk - - online
TagmaStore-USP0_24 auto:cdsdisk mydg02 mydg online
TagmaStore-USP0_25 auto:cdsdisk mydg03 mydg online keepmeta
TagmaStore-USP0_28 auto:cdsdisk mydg01 mydg online
In the first example, cloned disks (shadow image devices) from an Hitachi TagmaStore array are to be imported. The primary (non-cloned) disks, mydg01, mydg03 and mydg03, are already imported, and the cloned disks are not tagged.
TagmaStore-USP0_3 auto:cdsdisk - (mydg) online udid_mismatch
TagmaStore-USP0_23 auto:cdsdisk mydg02 mydg online
TagmaStore-USP0_25 auto:cdsdisk mydg03 mydg online
TagmaStore-USP0_30 auto:cdsdisk - (mydg) online udid_mismatch
TagmaStore-USP0_31 auto:cdsdisk - (mydg) online udid_mismatch
TagmaStore-USP0_32 auto:cdsdisk mydg01 mydg online
To import the cloned disks, they must be assigned a new disk group name, and their UDIDs must be updated:
# vxdg -n newdg -o useclonedev=on -o updateid import mydg
TagmaStore-USP0_3 auto:cdsdisk mydg03 newdg online clone_disk
TagmaStore-USP0_23 auto:cdsdisk mydg02 mydg online
TagmaStore-USP0_25 auto:cdsdisk mydg03 mydg online
TagmaStore-USP0_30 auto:cdsdisk mydg02 newdg online clone_disk
TagmaStore-USP0_31 auto:cdsdisk mydg01 newdg online clone_disk
TagmaStore-USP0_32 auto:cdsdisk mydg01 mydg online
Note that the state of the imported cloned disks has changed from online udid_mismatch to online clone_disk.
In the next example, none of the disks (neither cloned nor non-cloned) have been imported:
TagmaStore-USP0_3 auto:cdsdisk - (mydg) online udid_mismatch
TagmaStore-USP0_23 auto:cdsdisk - (mydg) online
TagmaStore-USP0_25 auto:cdsdisk - (mydg) online
TagmaStore-USP0_30 auto:cdsdisk - (mydg) online udid_mismatch
TagmaStore-USP0_31 auto:cdsdisk - (mydg) online udid_mismatch
TagmaStore-USP0_32 auto:cdsdisk - (mydg) online
To import only the cloned disks into the mydg disk group:
# vxdg -o useclonedev=on -o updateid import mydg
TagmaStore-USP0_3 auto:cdsdisk mydg03 mydg online clone_disk
TagmaStore-USP0_23 auto:cdsdisk - (mydg) online
TagmaStore-USP0_25 auto:cdsdisk - (mydg) online
TagmaStore-USP0_30 auto:cdsdisk mydg02 mydg online clone_disk
TagmaStore-USP0_31 auto:cdsdisk mydg01 mydg online clone_disk
TagmaStore-USP0_32 auto:cdsdisk - (mydg) online
In the next example, a cloned disk (BCV device) from an EMC Symmetrix DMX array is to be imported. Before the cloned disk, EMC0_27, has been split off from the disk group, the vxdisk list command shows that it is in the error udid_mismatch state:
EMC0_1 auto:cdsdisk EMC0_1 mydg online
EMC0_27 auto - - error udid_mismatch
The symmir command is used to split off the BCV device:
# /usr/symcli/bin/symmir -g mydg split DEV001
After updating VxVM's information about the disk by running the vxdisk scandisks command, the cloned disk is in the online udid_mismatch state:
EMC0_1 auto:cdsdisk EMC0_1 mydg online
EMC0_27 auto:cdsdisk - - online udid_mismatch
The following command imports the cloned disk into the new disk group newdg, and updates the disk's UDID:
# vxdg -n newdg -o useclonedev=on -o updateid import mydg
The state of the cloned disk is now shown as online clone_disk:
EMC0_1 auto:cdsdisk EMC0_1 mydg online
EMC0_27 auto:cdsdisk EMC0_1 newdg online clone_disk
In this example, cloned disks (BCV devices) from an EMC Symmetrix DMX array are to be imported. The primary (non-cloned) disks, mydg01, mydg03 and mydg03, are already imported, and the cloned disks with the tag t1 are to be imported.
EMC0_4 auto:cdsdisk mydg01 mydg online
EMC0_6 auto:cdsdisk mydg02 mydg online
EMC0_8 auto:cdsdisk - (mydg) online udid_mismatch
EMC0_15 auto:cdsdisk - (mydg) online udid_mismatch
EMC0_18 auto:cdsdisk mydg03 mydg online
EMC0_24 auto:cdsdisk - (mydg) online udid_mismatch
The disks are tagged as follows:
To import the cloned disks that are tagged as t1, they must be assigned a new disk group name, and their UDIDs must be updated:
# vxdg -n newdg -o useclonedev=on -o tag=t1 -o updateid import mydg
EMC0_4 auto:cdsdisk mydg01 mydg online
EMC0_6 auto:cdsdisk mydg02 mydg online
EMC0_8 auto:cdsdisk mydg03 newdg online clone_disk
EMC0_15 auto:cdsdisk - (mydg) online udid_mismatch
EMC0_18 auto:cdsdisk mydg03 mydg online
EMC0_24 auto:cdsdisk mydg01 newdg online clone_disk
As the cloned disk EMC0_15 is not tagged as t1, it is not imported. Note that the state of the imported cloned disks has changed from online udid_mismatch to online clone_disk.
By default, the state of imported cloned disks is shown as online clone_disk. This can be removed by using the vxdisk set command as shown here:
EMC0_4 auto:cdsdisk mydg01 mydg online
EMC0_6 auto:cdsdisk mydg02 mydg online
EMC0_8 auto:cdsdisk mydg03 newdg online
EMC0_15 auto:cdsdisk - (mydg) online udid_mismatch
EMC0_18 auto:cdsdisk mydg03 mydg online
EMC0_24 auto:cdsdisk mydg01 newdg online clone_disk
In the next example, none of the disks (neither cloned nor non-cloned) have been imported:
EMC0_4 auto:cdsdisk - (mydg) online
EMC0_6 auto:cdsdisk - (mydg) online
EMC0_8 auto:cdsdisk - (mydg) online udid_mismatch
EMC0_15 auto:cdsdisk - (mydg) online udid_mismatch
EMC0_18 auto:cdsdisk - (mydg) online
EMC0_24 auto:cdsdisk - (mydg) online udid_mismatch
To import only the cloned disks that have been tagged as t1 into the mydg disk group:
# vxdg -o useclonedev=on -o tag=t1 -o updateid import mydg
EMC0_4 auto:cdsdisk - (mydg) online
EMC0_6 auto:cdsdisk - (mydg) online
EMC0_8 auto:cdsdisk mydg03 mydg online clone_disk
EMC0_15 auto:cdsdisk - (mydg) online udid_mismatch
EMC0_18 auto:cdsdisk - (mydg) online
EMC0_24 auto:cdsdisk mydg01 mydg online clone_disk
As in the previous example, the cloned disk EMC0_15 is not tagged as t1, and so it is not imported.