Live Video and Video Recording Fail Because LUNs Are Not Formatted

Publication Date:  2012-07-20 Views:  71 Downloads:  0
Issue Description
Version:
l           iNVS V100R002C01 (SoftRAID)
l           iNVS V100R002C02 (SoftRAID)
Symptoms:
l           After you have logged in to the surveillance software, you cannot open any live videos, and the system indicates that collecting frames times out.
l           After you have logged in to Special Player, you cannot query historical videos.
Alarm Information
None.
Handling Process

Reconfigure RAID groups and create a LUN with a stripe depth of 128 KB in each RAID group.

Format the LUNs after they are created.

Root Cause
Cause analysis:
1.         Because the faulty NVR is configured with RAID, enter the RAID configuration page.
2.         Choose RAID Management.
The RAID configuration does not meet the requirements.
l           Five disks are used to form one RAID group and two LUNs are created in this RAID group.
l           The stripe depth of each LUN is only 4 KB, which is too small.
3.         Log in to the ESM system and select Event.
In the All Events or Current Events list, the error message No hard disk is available when writing media data to the hard disk on the NVR is displayed.
Conclusion:
An analysis of the PSM logs confirms that LUNs are not formatted, which causes that no storage can be used to store the videos. In addition, the BSM restarts automatically to protect itself. As a result, the system indicates that collecting frames times out when you open a live video.
Suggestions
If you use SoftRAID to configure RAID groups with data disks, you need to manually create RAID groups and LUNs, and then format the LUNs. It is recommended that you follow these instructions:
l           Create a LUN for each RAID group. When the V1300N is fully loaded with 24 disks, the configuration suggestions are shown in Table 19-1.
l           The recommended stripe depth values are shown in Table 19-2.
Recommended RAID group configuration when the V1300N is fully loaded with 24 disks
Device Type Configuration of RAID Groups Number of RAID Groups Number of Hot Spare Disks Number of System Disks
V1300N: On which both the PSM and ESM are installed Ten data disks form a RAID 5 group. 2
                            Disks in slots c to l form a RAID group.
                            Disks in slots m to v form a RAID group.
2
Disks in slots w and x are set as hot spare disks.
2
Disks in slots a and b are set as system disks.
V1300N: On which only the PSM is installed Eleven data disks form a RAID 5 group. 2
                            Disks in slots b to l form a RAID group.
                            Disks in slots m to w form a RAID group.
1
The disk in slot x is set as a hot spare disk.
1
The disk in slot a is set as a system disk.
 
Recommended stripe depth values
Number of Member Disks in the RAID Group Stripe Depth (KB)
5 to 9 128
10 to 13 512

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