background image

 

CAUTION 

All data on the second array will be destroyed. 

9.

 

Click OK

.

  

10.

 

When ACU has finished updating the configuration, restart the operating system. The Smart Array 

controller will use the rebuild process to synchronize the mirrored drives. You can boot the 
operating system during the rebuild process, but the logical drive will not be fault-tolerant until the 

rebuild is complete.   

NOTE    

The drive-online LED will blink during the rebuild synchronization 
process. When it stops blinking and turns solid green, the 

rebuild is complete. A 300-GB SAS (3.5” 15K) drive can take 

up to 2 hours to rebuild a mirrored array (depending on the 
number of IOPS the server is submitting to the controller). 

For more information or to download the Array Configuration Utility, refer to this URL: 

http://h18004.www1.hp.com/products/servers/proliantstorage/software-management/acumatrix/index.html

  

Breaking a mirror and rebuilding the array using the 

manual method 

CAUTION 

Use the following procedure for configurations with only one 
array on the controller. If multiple arrays are configured on a 

single controller, all arrays (and consequently all logical drives 

within each array) must be broken and restored together. 
Because of the added complexity, this method of creating a 

quick backup of the logical drives is strongly discouraged in 
configurations with multiple arrays per controller. 

A RAID 1 mirror can be broken simply by removing a drive while the server is online. However, to 

preserve the data on drives being removed, it is necessary to shut down the system first. If the 

removed drives will be used to restore the system, or if the data on the drives will be required for any 

reason, follow these steps 

exactly

 to break a mirror: 

1.

 

Verify that the controller is configured with RAID 1 (or RAID 1+0) logical drives only. 

2.

 

Shut down the operating system (to ensure a clean file system shutdown).  

3.

 

Shut down the server. 

4.

 

With the power off, remove one half of the drives created by the mirror (the backup). Be sure to 
label each of the removed drives with its respective drive bay number, and store these drives in a 

safe place. 

 

Summary of Contents for 411508-B21 - Smart Array E200/128 BBWC Controller RAID

Page 1: ...rrored array using the Array Configuration Utility 3 Recombining a split mirrored array using the Array Configuration Utility 4 Breaking a mirror and rebuilding the array using the manual method 5 Reverting to a previous copy of a mirrored set using the manual method 7 For more information 9 Call to action 9 ...

Page 2: ... store them for use as system backup The administrator can then replace the removed drives with new drives and allow the controller to automatically rebuild the new drives to restore fault tolerance Reverting to a previous backup is more complex and is explained later in this paper When increased capacity is required an administrator can replace half of the drives in a RAID 1 or RAID 1 0 array wit...

Page 3: ...dentical new arrays consisting of RAID 0 logical drives This functionality is useful when replicating a configuration or building a backup before performing a risky operation Note that this is a bit different from the manual method in which the volumes remain in their original RAID 1 or RAID 1 0 configuration after being split Also note that using the ACU does not require splitting other arrays at...

Page 4: ...f the arrays the operating system will be unable to distinguish between the two new arrays after the operating system has been restarted next step because the arrays will be identical 13 Restart the operating system Recombining a split mirrored array using the Array Configuration Utility To re mirror an array using ACU complete the following steps 1 Take the server offline 2 Insert the CD or boota...

Page 5: ... the following procedure for configurations with only one array on the controller If multiple arrays are configured on a single controller all arrays and consequently all logical drives within each array must be broken and restored together Because of the added complexity this method of creating a quick backup of the logical drives is strongly discouraged in configurations with multiple arrays per...

Page 6: ...by mistake simply reboot again and press F2 to fail the drives Figure 1 Boot up message indicating that the logical drive is still available but missing physical drives NOTE If the logical drive is failed at this point and the system will not boot most likely two drives that were mirrored to one another have been removed If this occurs shut down the system reinstall all drives and turn the system ...

Page 7: ...at became part of the array during a rebuild process can OVERWRITE the BACKUP drive Be especially careful in using hot spares where the rebuild may have happened automatically and it is unclear whether another drive is now part of the array To simplify this process remove any spares before breaking the mirror and reinstall the spares only after the array is rebuilt To revert to a previous copy of ...

Page 8: ...rt automatically run the Array Configuration Utility to initiate the rebuild CAUTION It is critical that the drives to be overwritten are hot inserted they must not be installed while the server is powered off NOTE The drive online LED will blink during the rebuild process When it stops blinking and turns solid green the rebuild is complete A 300 GB SAS 3 5 15K drive can take up to 2 hours to rebu...

Page 9: ...w2 hp com bc docs support SupportManual c00 729544 c00729544 pdf Call to action Send comments about this paper to TechCom HP com 2009 Hewlett Packard Development Company L P The information contained herein is subject to change without notice The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services Nothing herein shou...

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