-5

I bought my new server Dell R620 and it does have Perc710P HW Raid controller.

I have 4x512GB Samsung 850 Pro SSD's.

I will use cPanel and host over 1000 websites on server. That means I need storage space and speed. I know that Raid 0 is not safe. But what about making Raid 0 with hardware raid controller? Does it make it difference or still unsafe to use Raid 0?

Vandelay
  • 21
  • 3

3 Answers3

6

Regardless of how RAID 0 is implemented it works the same way, it does not include fault tolerance. If a disk fails you will loose access to the RAID 0 volume. If you want fault tolerance for your volumes then you should use RAID 1, RAID 5 etc.

here is a link that the describes the different RAID levels:

http://www.thegeekstuff.com/2010/08/raid-levels-tutorial

Michael Brown
  • 3,204
  • 2
  • 9
  • 10
2

It doesn't matter if a RAID0 is hardware or software based. All implications and pros and cons about performance and probability of losing a disk stay the same. Losing a disk also depends on the disks itself and could also occur if there is a bad cable or cable connection.

In case of a disk failure and using RAID0, all data would be destroyed instantly which would make the 1000 websites offline.
Depending on the backup/restore strategy it might be feasible to run a RAID0, still at a very high risk.

Thomas
  • 4,155
  • 5
  • 21
  • 28
1

Hard raid (with BBU) only makes a difference when it comes a power outage and your ups (if any) can't keep the server up, and the power goes down; if there's a bbu the controller and disks will stay up enough to have the writing committed to disks, and that prevents data loss/corruption in case of power failure, and REGARDLESS of the raid level. Coming to your question, consider that NOTHING can be considered safe when talking about data security; just imagine how can be considered a raid level that doesn't even implement any kind of redundancy.

Any media failure=All data loss

I won't use such in a production env, consider buying more disks and going to raid10 if you really need raid0 enhanced IO performance. Consider testing raid5 and/or raid1, your SSDs should perform very well even with no raid0. With raid5 you will have 512G less (1,5T more or less) but will have implemented a minmum layer of media fault tolerance.

Will it be safe then? No, you will be more safe. You can never say data are safe, just more or less safe than before.

Marco
  • 1,679
  • 3
  • 17
  • 31