Dell PowerVault MD3660i Series Storage Array Посібник з розгортання - Сторінка 6

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One or more host servers attached to the storage array can access the data on the storage array. You can also establish

multiple physical paths between the host(s) and the storage array so that loss of any single path (for example, through

failure of a host server port) does not result in loss of access to data on the storage array.

The storage array is managed by MD Storage Manager running on a:

•

Host server — On a host server system, MD Storage Manager and the storage array communicate management

requests and event information using SAS connections.

•

Management station — On a management station, MD Storage Manager communicates with the storage array

either through an Ethernet connection to the storage array management port or through an Ethernet connection

to a host server. The Ethernet connection passes management information between the management station

and the storage array using SAS connections.

Using MD Storage Manager, you can configure the physical disks in the storage array into logical components called

disk groups and then divide the disk groups into virtual disks. Disk groups are created in the unconfigured capacity of a

storage array. Virtual disks are created in the free capacity of a disk group.

Unconfigured capacity comprises physical disks not already assigned to a disk group. When a virtual disk is created

using unconfigured capacity, a disk group is automatically created. If the only virtual disk in a disk group is deleted, the

disk group is also deleted. Free capacity is space in a disk group that is not assigned to any virtual disk.

Data is written to the physical disks in the storage array using RAID technology. RAID levels define the way in which

data is written to physical disks. Different RAID levels offer different levels of accessibility, redundancy, and capacity.

You can set a specified RAID level for each disk group and virtual disk on your storage array. For more information about

using RAID and managing data in your storage solution, see the Administrator's Guide at support.dell.com/manuals.