Online expansion of Dell server RAID5

First, the current environment

server name	model	raid type	Zoning introduction	HDD details /td>
dc-4	dell R710	raid5	total: 836.62gb c disk: 60GB d Disk: 20GB e 756.62GB	4 block 300G

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Ii. description

Raid expansion is divided into online expansion and offline expansion of two methods. On-line expansion refers to the use of server management software to reconfigure RAID while the system is running uninterrupted, and offline expansion means the method of raid configuration in the array card configuration mode after the interruption of the system Operation . The two methods have advantages and disadvantages, the online expansion does not require downtime, the system can provide services, but relatively slow speed, offline expansion is relatively fast, but requires a short period of time to interrupt the system operation, and this method requires a very familiar with the card configuration operation, because if the error occurred, it is possible to cause data loss.

Third, the purpose

in the new two 300G hard drive to RAID5 array on Dell R710 , using Dell Server Management tool Dell OpenManage Server Administrator (OMSA) enables server RAID5 online expansion.

Iv. steps

1. Shut down the server and insert a new two hard drive. Boot, observe the new hard drive status lights are normal.

2. if the newly added hard disk is a hard disk that has ever been raid, the raid information on the hard disk must be cleared first . Open dellopenmanage Server Administrator. Select Storage under Locate the physical disk and find that the new hard disk status is "not serious". The RAID array information for the old hard disk is not cleared.

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3, open OMSA, click on the storage, click on the "Available Tasks" drop-down box select "External Configuration", execute, select Clear, and then switch to the physical disk, found that the disk status becomes online.

4, click on the virtual disk, click on the "Available Tasks" drop-down box select "Reconfigure ...", execute.

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5. In the connector option, tick the new plus two hard drive and click Continue.

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6, set the properties of the virtual disk, first the corresponding raid level (here Select raid5), you will see the size of the disk after expansion, continue.

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7. The status of the virtual disk will be from "rebuilding" to "initializing disk" and then to "ready".

8, if after the completion of the computer in the disk Management did not find the disk changes, you can restart the server to try.

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Online expansion of Dell server RAID5