Jump to content
RESET Forums (homeservershow.com)

Raid 1 and failure of hardware.


rodzynx
 Share

Recommended Posts

Hello,

 

A few months back I had a very simple setup of my N54L where all drives were simply connected and in case of any problems I could connect them to any other computer and read the data.

Since I moved to Gen8 I decided to invest and take advantage of Raid 1.  The Idea is brilliant as this will protect me from a failure of one drive but will it protect me from Hardware failure?

So my questions are; If a build in controller dies:

  1. Is it possible to keep, save, retrieve written data (assuming that both drives are working)?
  2. Would I be able to just connect the drives to any Raid controller or does it have to be the identical controller (another gen8)?
  3. How to protect myself from that kind of scenario?
  4. If let's say I have OS drive in ODD bay can I reinstall windows, not touching any of arrays) and still keep the data or reinstallation of Windows will destroy the configuration. I think it should be ok as the array is not software but just wanted to check before I start messing around with reinstallation.

 

Thank you

 

Edited by rodzynx
Link to comment
Share on other sites

Oh my, you're bringing back some memories for me. Let me quote, as near as I can, what my father would tell you:

 

"RAID is not a form of backup; it's a form of resiliency". I'm not sure that's exactly how he put it, but he told me over and over that the 3-2-1 backup system, or something very similar, is the only way to keep data safe. He told me that RAID is a way of helping keep a system up and running; in other words, a way of reducing or stopping system crashes due to disk failure.

 

I don't know about different RAID cards, but people seem to make a big deal out of the fact that DrivePool can pick up and rebuild drive pools, even if the drives are moved to another computer. That makes me wonder if that's because RAID cards don't do that. Otherwise, why point it out so much?

Link to comment
Share on other sites

Hi Ikon-TNG,

 

Don't take me wrong, I know that rule and I have a backup of a backup, but as I was always using raid at work I have never thought of what if scenario. Now when I implemented Raid at home I was wondering.

When you say "DrivePool" do you mean Stablebit Drivepool software?

thx

 

 

Edited by rodzynx
Link to comment
Share on other sites

@rodzynx My father would be happy to hear you have multiple backups. It's something he constantly stressed to family & friends. He hated the idea of people losing important info.

 

Sorry for not being clearer: yes, I meant Stablebit DrivePool.

Link to comment
Share on other sites

RAID sets are generally able to be migrated to other controllers from the same vendor. The RAID1 set in your MS Gen8 could be pulled and moved to a different HP server with a B120i or newer Dynamic RAID controller. The RAID set could also be moved to a HP Smart Array controller like a P222. You can not move RAID sets from HP to LSI or Adaptec based controllers. Your last point is very imporant, it is best to keep data and OS separate from each other. If you have an OS drive failure, you could replace the drive and install the OS without affecting your data.

  • Like 1
Link to comment
Share on other sites

11 minutes ago, schoondoggy said:

RAID sets are generally able to be migrated to other controllers from the same vendor.

 

@schoondoggy  would you be able to direct me towards some instructions on how to do it?

 

Thx

Link to comment
Share on other sites

44 minutes ago, schoondoggy said:

RAID sets are generally able to be migrated to other controllers from the same vendor. The RAID1 set in your MS Gen8 could be pulled and moved to a different HP server with a B120i or newer Dynamic RAID controller. The RAID set could also be moved to a HP Smart Array controller like a P222. You can not move RAID sets from HP to LSI or Adaptec based controllers.

 

Very interesting. My mind immediately went to this analogy: some parts of, for example, GM vehicles can be moved from one model to another, but not from a GM vehicle to a Ford or Chrysler. In your opinion, is that a fair analogy?

Link to comment
Share on other sites

42 minutes ago, rodzynx said:

 

@schoondoggy  would you be able to direct me towards some instructions on how to do it?

 

Thx

Pages 24-25 cover moving RAID sets:

https://support.hpe.com/hpsc/doc/public/display?docId=c03326739

10 minutes ago, Ikon-TNG said:

 

Very interesting. My mind immediately went to this analogy: some parts of, for example, GM vehicles can be moved from one model to another, but not from a GM vehicle to a Ford or Chrysler. In your opinion, is that a fair analogy?

That would be a fair analogy. You just need to understand the rules that apply.

Link to comment
Share on other sites

31 minutes ago, schoondoggy said:

That would be a fair analogy. You just need to understand the rules that apply.

 

The devil is always in the details......

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share

  • Similar Content

    • Grumbleskin
      By Grumbleskin
      Hey Guys,
       
      I am have been trying to find some information and I am getting conflicting reads.
       
      Sounds like this might be a question for pcdoc, but I would like input from anyone that knows...
       
      I want to break some Raid 1 arrays on my HPT 3520. What is the best way of going about doing this without losing data?
       
      Do I do a OCE/ORLM to a jbod? If I do are the 2 drives then seen as one whole drive or 2 separate again? I don't know which way HPT does it...
      or do I just delete array and reboot?
       
      One other question...  What is the highest HPT Raid Management web gui this card supports? I have 1.5.6, but when I tried v2.5 it ate my machine and caused all kinds of problems.
      Trying to connect with the web gui made I/O errors on an array. I uninstalled it and everything was back to normal. V1 sucks, would like to run a newer V2 if at all possible.
×
×
  • Create New...