Dell PowerVault MD3200i Series Manuale d'uso - Pagina 30

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Using the Adaptive Scheme to Make LUN Decisions

When you plan how to set up your storage for your ESX/ESXi systems before

you format LUNs with VMFS datastores, you must decide on the LUN size

and number of LUNs to use. You can experiment using the adaptive scheme.

1 Create a large LUN (RAID 1+0 or RAID 5), with write caching enabled.

2 Build a VMFS on that LUN.

3 Place four or five virtual disks on the VMFS.

4 Run the applications to determine whether disk performance is

acceptable.

If performance is acceptable, you can place additional virtual disks on the

VMFS. If performance is not acceptable, create a new, larger LUN, possibly

with a different RAID level, and repeat the process. Use migration so that you

do not lose virtual machines when you re-create the LUN.

After a new disk group is created, new virtual disks can be created from the

free capacity within the disk group. To create a new virtual disk, click the

Create Virtual Disk link to launch the Create Virtual Disk wizard. See

Figure 20. On the wizard, you can enter the virtual disk name, select the disk

group to use for the new virtual disk, enter the size of the new virtual disk,

and set the I/O characteristics of the virtual disk. Click OK to create the

virtual disk.

Dell MD Storage Array vCenter Plug-in