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    How to create LUNs after RAID failure (DIVAR IP 6000/ 7000) ?

    The disks in an array are usually configured into smaller sets named RAID groups which provide protection against failure.

    The RAID groups define the manner in which the group of physical disks handle data when it is written to the disks within that group. The main aim is that data to be protected.

    For this reason, you must create logical unit numbers (LUNs) correctly.

    This article describes all the steps that will help you to create LUNs after RAID failure.

    Article requirements:

    1. System Manager
    2. BVMS Configuration Client which is included with BVMS
    3. Mega RAID Storage Manager
    4. DIVAR IP 6000/ 7000

     

    Step-by-step guide

    Important:

    Do not skip the 10th step!

    1.Open Configuration Client > Devices tab > right click on the Pool > select Add iSCSI Device

    1_How to create LUNs after RAID failure for DIVAR IP 6000-7000.png

    2. Fill in the fields with necessary details > OK > Save 2_How to create LUNs after RAID failure for DIVAR IP 6000-7000.pngChanges and Activate Configuration3_How to create LUNs after RAID failure for DIVAR IP 6000-7000.png > OK

    4_How to create LUNs after RAID failure for DIVAR IP 6000-7000.png

    3. Right click on your device in Configuration Client > Scan Target > “Target and LUNs are successfully updated” is displayed but physical capacity is not detected.
    The reason is that the iSCSI software is not detecting the RAID5 partition.

    5_How to create LUNs after RAID failure for DIVAR IP 6000-7000.png

    4. Open Server Manager > File and storage Services > Volumes > Disks

    The RAID 5 partition will be visible here as unknown with 19.1 Tb of unallocated space. 

    6_How to create LUNs after RAID failure for DIVAR IP 6000-7000.png

    5. Right click on it > New Volume > Next > Next > OK  to initiate the creation of the new RAID 5 partition as GPT  allocating 19.1 Tb of unallocated capacity 

    7_How to create LUNs after RAID failure for DIVAR IP 6000-7000.png

    6. Select the size of the volume (it is recommended to use the total available capacity) 

    8_How to create LUNs after RAID failure for DIVAR IP 6000-7000.png

    7. Assign to the volume a drive letter (the default one should be D) and click Next

    9_How to create LUNs after RAID failure for DIVAR IP 6000-7000.png

    8. File System Settings: We recommend you to selectNTFS” for File system and “Default” for Allocation unit size and click Next

    10_How to create LUNs after RAID failure for DIVAR IP 6000-7000.png

    9. In “Confirmation” tab click Create

    11_How to create LUNs after RAID failure for DIVAR IP 6000-7000.png

    Wait until all the lines ar completed and click “Close

    Now, the partition will be changed from “unknown” to “GPT and the unallocated capacity will be zero.

    12_How to create LUNs after RAID failure for DIVAR IP 6000-7000.png

    10. Now, please RESTART THE UNIT!

    11. Go back to Configuration Client and click on theRefresh Button a.png. The new capacity is detected in MB. 

    Now we need to initialize the Basic Configuration where the VRM will automatically create the inputted number of luns.
    To calculate the number of luns for the detected capacity you need to follow the below procedure: 

    You need to divide the physical capacity which is detected by the Configuration client as in the below picture with a number which is near the maximum size of 2000 Gb

    For example: 19557/ 1900 = 10.29 => Number of LUNs = 11

    As the result is above 10 we will select 11 in order for the luns to have a size near 2000Gb.

    12. Complete the Number of LUNs and click Set > Yes

    13_How to create LUNs after RAID failure for DIVAR IP 6000-7000.png

    Wait until all the lines are completed with status Finished and click Close

    14_How to create LUNs after RAID failure for DIVAR IP 6000-7000.png

    13. If you click on the DIP 7000, a new attention message will be displayed. Click YES

    15_How to create LUNs after RAID failure for DIVAR IP 6000-7000.png

    14. Right click again on the DIP and select Scan Target

    16_How to create LUNs after RAID failure for DIVAR IP 6000-7000.png

    15. Click OK and Save changes 2_How to create LUNs after RAID failure for DIVAR IP 6000-7000.png

    17_How to create LUNs after RAID failure for DIVAR IP 6000-7000.png

    16. Under DIVAR IP 7000 will be displayed a new icon. a) Click on it > b) tick all the boxes next to the LUNs > c) Hit Format LUN button > OK

    18_How to create LUNs after RAID failure for DIVAR IP 6000-7000.png

    In meanwhile, go to Server Manager > iSCSI and click on the refresh button. All iSCSI virtual disks will be visible here (11 in total, as we set earlier)

    19_How to create LUNs after RAID failure for DIVAR IP 6000-7000.png

    Recommended  select 4 luns at the time

    Important:

    If some of the LUNs were not formatted, tick all the remaining boxes with status “unknown” or “HD_FORMAT….” and hit again the Format LUN button

    20_How to create LUNs after RAID failure for DIVAR IP 6000-7000.png

    17. Wait until all the LUNs are formatted and click the Activate Configuration button > OK

    They should be displayed as in the following picture:

    21_How to create LUNs after RAID failure for DIVAR IP 6000-7000.png

    18. Wait until initialization is done in Mega RAID Storage Manager.
    It might be possible for the recording to not start after the LUNs creation as the right controller is initializing the virtual drives.

    22_How to create LUNs after RAID failure for DIVAR IP 6000-7000.png

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