What if RAID fails in video surveillance?

There’s a misconception among people that RAID is foolproof. But in reality, that is not the case as it’s possible for multiple disks to fail. This can take place all at once or over time. If an administrator isn’t properly monitoring the server for disk failures, disks can fail over time causing the array to fail.

The other fact to be noted over here is that the more disks that you have in the array, the higher is the probability of failure. While RAID 5 and RAID 6 do offer some comfort in protecting the data, it is highly recommended that people also backup their mission critical video surveillance data. Otherwise, in some cases, failure to present critical video evidence on time can prove fatal.

So, what RAID level should be selected?

Selection of RAID level depends on the answers to the following questions-

  1. Is the data critical and needs to be available at all times?
  2. Is there a need for redundancy and/or high disk speed access?

If the need for redundancy is zero, then you just need a single hard drive. The expense of such storage will be less. But if the answer is yes and the data you need is critical, then using RAID with a backup is recommended.

Usually, for critical data, some may choose to record to two servers (called multicast) that are in a RAID simultaneously. If something goes wrong with one server, the other will keep the data intact and will keep the recording running as usual. Here, RAID level 6 or combination of different RAID levels can also help. With RAID 6 in place, the trouble brewing with two hard disk drives failures can also be mitigated.

But imagine, if the failure rate goes beyond the available spare drives. Then what?

This is where DNF Security Lifeline which is a Remote Monitoring Service (RMS) helps customers to react, identify and resolve mission critical system and network infrastructure problems and this includes monitoring of disk/s health. With the proactive-predictive Lifeline-RMS, customers get a peace of mind that their system does not suffer from any unplanned down-time due to disk failures. Notification of critical system status can be delivered via a wide variety of options including email or SMS.

DNF Security Lifeline RMS helps in continuously monitoring video server health and this includes keeping a track of disk space utilization, storage array health, CPU utilization, Physical Memory Utilization, Number of processes running, system uptime and such. Yeah, the status tracking feature works similar to that of a “Task Manager” seen in a Windows Operating system.

On an overall note, the Lifeline RMS of DNF acts as a proactive-predictive monitoring tool which helps in avoiding unplanned downtime and helps in reducing operational and service call costs.

Call 510.265.1122 or click on DNF Lifeline RMS to know more




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