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Snapdrive for Unix

Connecting to multiple filespecs

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You can connect to multiple filespecs that reside in a volume. The following example describes how you can complete this operation.

For creating restricted FlexClone, you need to set the san-clone-method=unrestricted in the snapdrive.conf file or give -clone unrestricted before you can connect to multiple filespec. This example displays the results when you want to connect to multiple filespec /mnt/fs_1 and /mnt/fs_2 in snap1 which reside in volume vol1.

The layout of /mnt/fs_1 and /mnt/fs_2 is given in the following:

 # snapdrive storage show -fs /mnt/fs_1 /mnt/fs_2 -capabilities
raw device: /dev/sdc1   mount point: /mnt/fs_1 (persistent) fstype ufs
allowed operations: all

device filename      adapter     path     size    proto   state     clone     lun path           backing snapshot
----------------     -------     ----    ------   -----   -----    -------  ----------------     ----------------
/dev/sdc                -         P       100m    iscsi   online      No    homer:/vol/vol1/lun1        -

raw device: /dev/sdo1   mount point: /mnt/fs_2 (persistent) fstype ufs
allowed operations: all

device filename     adapter path    size     proto   state   clone    lun path               backing snapshot
----------------    ------- ----    ----    -------  -----   -----    --------               ----------------
/dev/sdo               -     P      100m     iscsi   online   No      homer:/vol/vol1/lun2        -

Here the user used Snapshot snap2 which contains application consistent Snapshots of /mnt/fs1 and /mnt/fs2 for snap connect.

 # snapdrive snap connect -fs /mnt/fs_1 -fs /mnt/fs_2 -snapname homer:/vol/vol1:snap2 -autorename -clone unrestricted

 connecting /mnt/fs_1:
        creating unrestricted volume clone homer:/vol/Snapdrive_vol1_volume_clone_from_snap2_snapshot ... success

        mapping new lun(s) ... done

 connecting /mnt/fs_2:

        mapping new lun(s) ... done
        discovering new lun(s) ... done
Successfully connected to snapshot homer:/vol/vol1:snap2
        file system: /mnt/fs_1_0
        file system: /mnt/fs_2_0

Here, SnapDrive for UNIX has created a single unrestricted FlexClone Snapdrive_vol1_0_volume_clone_from_snap2_Snapshot from Snapshot snap2. This is then connected to LUN testlun1 and testlun2 to create a cloned host file system /mnt/fs1_0 and /mnt/fs2_0 respectively.

# snapdrive storage show -fs /mnt/fs_1_0 /mnt/fs_2_0 -capabilities
raw device: /dev/sde1   mount point: /mnt/fs_1_0 (persistent) fstype ufs
allowed operations: all

device filename      adapter   path  size    proto   state   clone      lun path                                                         backing snapshot
----------------      -------  ----  ----    -----   -----   -----       --------                                                        ----------------
/dev/sde                 -      P    100m    iscsi   online  flex-clone  homer:/vol/Snapdrive_vol1_volume_clone_from_snap2_snapshot/lun1   vol1:snap2

raw device: /dev/sdac1  mount point: /mnt/fs_2_0 (persistent) fstype ufs
allowed operations: all

device filename      adapter  path    size    proto   state   clone      lun path                                                            backing snapshot
----------------      -------  ----    ----    -----   -----   -----      --------                                                           ----------------
/dev/sdac                 -     P      100m    iscsi   online  flex-clone homer:/vol/Snapdrive_vol1_volume_clone_from_snap2_snapshot/lun2     vol1:snap2