FLI online: Preparing the LUN path
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To prepare for FLI online migration, you verify the host and source LUN paths and other details.
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In ONTAP, change the privilege level to
advanced.cluster::> set adv Warning: These advanced commands are potentially dangerous; use them only when directed to do so by NetApp personnel. Do you want to continue? {y|n}: y -
Verify that the source array can be seen on the destination controller.
cluster::*> storage array show Prefix Name Vendor Model Options -------- ---------------------------- -------- ---------------- ---------- DGC-1 DGC_LUNZ_1 DGC LUNZ 1 entries were displayed.
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Display source LUN details.
cluster::*> storage array config show -array-name DGC_LUNZ_1 -instance Controller Name: ontaptme-fc-cluster-01 LUN Group: 0 Array Target Ports: 500601643ea067da Initiator: 0c Array Name: DGC_LUNZ_1 Target Side Switch Port: stme-5010-3:2-1 Initiator Side Switch Port: stme-5010-3:2-3 Number of array LUNs: 1 Controller Name: ontaptme-fc-cluster-01 LUN Group: 0 Array Target Ports: 500601653ea067da Initiator: 0d Array Name: DGC_LUNZ_1 Target Side Switch Port: stme-5010-4:2-1 Initiator Side Switch Port: stme-5010-4:2-3 Number of array LUNs: 1 ~~~~~~~~~~~ output truncated for readability ~~~~~~~~~~~~~~~~~ 8 entries were displayed. -
Verify the source array is discovered through all the initiator ports.
cluster::*> storage array config show -array-name DGC_LUNZ_1 LUN LUN Node Group Count Array Name Array Target Port Initiator ------------ ----- ----- ---------------------------- ----------------------- --------- ontaptme-fc-cluster-01 0 1 DGC_LUNZ_1 500601643ea067da 0c 500601653ea067da 0d 5006016c3ea067da 0c 5006016d3ea067da 0d ontaptme-fc-cluster-02 0 1 DGC_LUNZ_1 500601643ea067da 0c 500601653ea067da 0d 5006016c3ea067da 0c 5006016d3ea067da 0d 8 entries were displayed.
The word wrapping in the following output has no significance.
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List the LUNs mapped from the source storage. Verify the disk properties and paths.
cluster::*> storage disk show -array-name DGC_LUNZ_1 -instance Disk: DGC-1.9 Container Type: unassigned Owner/Home: - / - DR Home: - Stack ID/Shelf/Bay: - / - / - LUN: 0 Array: DGC_LUNZ_1 Vendor: DGC Model: VRAID Serial Number: 600601603F103100662E70861000E511 UID: 60060160:3F103100:662E7086:1000E511:00000000:00000000:00000000:00000000:00000000:00000000 BPS: 512 Physical Size: - Position: present Checksum Compatibility: block Aggregate: - Plex: - Paths: LUN Initiator Side Target Side Link Controller Initiator ID Switch Port Switch Port Acc Use Target Port TPGN Speed I/O KB/s IOPS ------------------ --------- ----- -------------------- -------------------- --- --- ----------------------- ------ ------- ------------ ------------ ontaptme-fc-cluster-02 0c 0 stme-5010-3:2-4 stme-5010-3:2-2 AO INU 5006016c3ea067da 2 4 Gb/S 0 0 ontaptme-fc-cluster-02 0d 0 stme-5010-4:2-4 stme-5010-4:2-2 AO INU 5006016d3ea067da 2 4 Gb/S 0 0 ontaptme-fc-cluster-02 0d 0 stme-5010-4:2-4 stme-5010-4:2-1 ANO RDY 500601653ea067da 1 4 Gb/S 0 0 Errors: - -
View the source LUN.
cluster::*> storage disk show -array-name DGC_LUNZ_1 Usable Disk Container Container Disk Size Shelf Bay Type Type Name Owner ---------------- ---------- ----- --- ------- ----------- --------- -------- DGC-1.9 - - - LUN unassigned - - -
Mark the source LUN as foreign.
cluster::*> storage disk set-foreign-lun -is-foreign true -disk DGC-1.9
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Verify the source LUN is marked as foreign.
cluster::*> storage disk show -array-name DGC_LUNZ_1 Usable Disk Container Container Disk Size Shelf Bay Type Type Name Owner ---------------- ---------- ----- --- ------- ----------- --------- -------- DGC-1.9 -
Serial numbers are used in FLI LUN import commands. List all foreign LUNs and their serial numbers.
cluster::*> storage disk show -container-type foreign -fields serial-number disk serial-number ------- -------------------------------- DGC-1.9 600601603F103100662E70861000E511
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Create a destination volume.
cluster::*> vol create -vserver fli -volume fli_vol -aggregate aggr1 -size 2t [Job 13888] Job succeeded: Successful
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Verify volume.
cluster::*> vol show -vserver fli Vserver Volume Aggregate State Type Size Available Used% --------- ------------ ------------ ---------- ---- ---------- ---------- ----- fli fli_root aggr1 online RW 1GB 972.6MB 5% fli fli_vol aggr1 online RW 2TB 1.90TB 5% 2 entries were displayed.
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Set fraction_reserveoption for each volume to
0and set the Snapshot policy tonone.cluster::*> vol modify -vserver datamig -volume * -fractional-reserve 0 –snapshot-policy none Volume modify successful on volume winvol of Vserver datamig.
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Check your volume settings.
cluster::*> vol show -vserver datamig -volume * -fields fractional-reserve,snapshot-policy vservervolumesnapshot-policyfractional-reserve ----------------------------------------------- datamigdatamig_rootnone0% datamigwinvolnone0% Volume modify successful on volume winvol of Vserver datamig.
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Delete any existing Snapshot copies.
cluster::*> set advanced; snap delete –vserver datamig –vol winvol –snapshot * -force true 1 entry was acted on.
FLI migration modifies every block of the target LUNs. If default or other Snapshot copies exist on a volume prior to FLI migration, the volume gets filled up. Changing the policy and removing any existing Snapshot copies before FLI migration is required. Snapshot policy can be set again post-migration.
The LUN create command detects the size and alignment based on partition offset and creates the LUN accordingly with foreign-disk option. For a review of I/O misalignment, review NetApp Knowledgebase article What is an unaligned I/O? Also note that some I/O will always appear to be partial writes and will therefore look misaligned. Examples of this would be database logs.
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Create the target LUN. The
LUN createcommand detects the size and alignment based on partition offset and creates the LUN accordingly with the foreign-disk argument.cluster::*> lun create -vserver fli -path /vol/fli_vol/OnlineFLI_LUN -ostype windows_2008 -foreign-disk 600601603F103100662E70861000E511 Created a LUN of size 1t (1099511627776)
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Verify new LUN.
cluster::*> lun show -vserver fli Vserver Path State Mapped Type Size --------- ------------------------------- ------- -------- -------- -------- fli /vol/fli_vol/OnlineFLI_LUN online unmapped windows_2008 1TB
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Create an igroup of protocol FCP with host initiators.
cluster::*> igroup create -vserver fli -igroup FLI -protocol fcp -ostype windows -initiator 10:00:00:00:c9:e6:e2:79
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Verify that the host logs in on all paths to the new igroup.
cluster::*> igroup show –vserver fli –igroup FLI Vserver name: fli Igroup name: FLI Protocol: fcp OS Type: Windows Portset Binding Igroup: - Igroup UUID: 5c664f48-0017-11e5-877f-00a0981cc318 ALUA: true Initiators: 10:00:00:00:c9:e6:e2:77 (logged in) 10:00:00:00:c9:e6:e2:79 (logged in) -
Offline the destination LUN.
cluster::*> lun offline -vserver fli -path /vol/fli_vol/OnlineFLI_LUN Warning: This command will take LUN "/vol/fli_vol/OnlineFLI_LUN" in Vserver "fli" offline. Do you want to continue? {y|n}: y -
Map the destination LUN to the igroup.
cluster::*> lun map -vserver fli -path /vol/fli_vol/OnlineFLI_LUN -igroup FLI
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Create import relationship between new LUN and foreign LUN.
cluster::*> lun import create -vserver fli -path /vol/fli_vol/OnlineFLI_LUN -foreign-disk 600601603F103100662E70861000E511