Binding LUNs

 
Binding LUNs- Raid Group systems

Binding LUNs - RAID Group systems Lets you bind LUNs within a RAID Group with certain restrictions. You can set properties such as RAID type, LUN ID, and LUN size as well as create a new RAID Group. You may want to determine if the RAID Group has enough free space to accommodate the new LUNs. Note If no LUNs exist on a storage system connected to a NetWare server, refer to the Release Notice for the NetWare Navisphere Agent for information on how to bind the first LUN.If you are binding LUNs on a storage system connected to a Solaris server, and no failover software is installed, refer to the Storage System Host Utilities for Solaris Administrator’s Guide (069001140) for information on how to bind the first LUN.If the LUNs you are binding reside on a storage system connected to a VMware ESX server, and these LUNs will be used with layered applications such as SnapView, configure the LUNs as raw device mapping volumes set to physical compatibility mode. Important Notes

  1. In the Enterprise Storage dialog box, right-click the icon for the storage-system, and then click Bind LUN. -or- In the Enterprise Storage dialog box, right-click the icon for a RAID Group, and then click Bind LUN.
  2. In RAID Type, select the RAID type for the new LUN. This sets the parent RAID type for the new LUN.
  3. In the RAID Group for new LUN list, click the ID of the RAID Group on which you want to bind the new LUNs. The list displays only those RAID Groups available for the selected RAID type. The RAID Group IDs range from 0 through 239; the RAID Group ID is assigned when the RAID Group is created. If the storage system does not have the RAID Group you want, you can create a new one by clicking New, which opens the Create RAID Group dialog box.
  4. Under LUN Properties, in the LUN ID list, click the ID for the new LUN. Note If this CLARiiON storage system is connected to a Celerra workstation, you must manually assign the LUN ID for any new LUNs. The LUN ID must be 16 or greater.
  5. Under LUN Properties, modify any of the user-defined properties that you want to change
  • In the Rebuild Priority list, click the new rebuild priority.
  • In the Verify Priority list, click the new verify priority.
  • As you create new LUNs, Manager assigns default LUN owners according to RAID Group IDs. To change the default assignments, under Default Owner, click SP A, SP B, or Auto to assign the ownership of the new LUN.
  • To select a LUN size, do one of the following: Click either MB to select Mbytes, or GB to select Gbytes as the unit of measure, and then in LUN Size, select a LUN size for the user space for the new LUN.ClickBlock Count, if available, to select blocks (512 bytes) as the unit of measure, and then in LUN Size, type in the number of blocks for the user space for the new LUN.
  • Select the Enable Read Cache check box to enable read caching for the new LUNs or clear it to disable read caching for them.
  • Select the Enable Write Cache check box to enable write caching for the new LUNs or clear it to disable write caching for them. A LUN with write caching enabled uses default prefetch property values. You can change a LUN’s prefetch property values using the Prefetch tab in the LUN Properties dialog box.
  • If available, select the Enable Auto Assign check box to enable auto assign for the new LUNs or clear it to disable auto assign. Note Auto assign is not available for storage systems with only one SP.
  • In the Number of LUNs to Bind list, click the number of LUNs you want to create with the selected RAID type and properties.
  • If necessary, in Alignment Offset, enter an alignment offset value. Important Proper use of Alignment Offset requires knowing the exact size of the private information. Improper use will degrade performance.
  • If you want to perform an initial background verify to eliminate latent soft media errors on the newly bound LUN, do NOT select the No Initial Verify check box ( unchecked is the default). If you do not want to perform the background verify operation, select the No Initial Verify check box.
Important Do not send data to the LUN until the background verify operation is complete.

6. Click Apply to bind the LUNs and close the dialog box.

Note Click Help in the dialog box to display descriptions of each property in the dialog box.

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