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Setting up RAID5 on HP ProLiant DL380G5

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Last Modified: 2017-02-25
Hi
We had HP ProLiant DL380G5 and I have removed all the low capacity hard disks and now I have purchased 3 refurbished HP 300GB 6G SAS 2.5 inch Hard disk for this server.

I want to set up Raid 5 with one hard disk as a spare. Please can you post me tutorials to achieve this.
Thanks and any help would be great.
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Most Valuable Expert 2015
Commented:
Don't use RAID 5. That is obsolete, and very unreliable, and hasn't been recommend since at least a decade. You are much better off with 2 RAID 1 arrays, or 1 RAID 10 array.

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Commented:
I have only 3 Hard disk and please let me know what i can achieve.
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Most Valuable Expert 2015
Commented:
With 3 disks you wouldn't be able to setup RAID 5 with a hot spare anyway, you'd need 4 disks for that. So you are left with RAID 1 with a Hot-Spare.
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Distinguished Expert 2019

Commented:
With 300GB disks RIAD 5 isn't so much of a risk as with the higher capacity ones. You would need 3 or more drives for RAID 5 and as you only have 3 then you could not have a spare. Press F8 when the Smart array controller initialoses and in ORCA you can select to create a new logical drive, it will default to 3 drives in RAID 5 anyway.

Safer would be mirroring two disks and having the 3rd one as a spare, same menu during boot but you would have to change the setting to RAID 10* rather than RAID5.

* it calls 2 disks mirrored "RAID 10" even though it is really RAID 1.
Freelance Consultant
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@Rindi is right to state that RAID 5 is an older technology and less reliable than current RAID options.  But to call it unreliable is not technically correct.  I have used RAID 5 in the past very successfully on HP kit and with very few issues.

You have older HP kit, so your options are limited.  You are also limited by the fact that you only have 3 drives.  You can create a RAID 5, but you will have to use all 3 drives actively within the array that you configure.  You would need a forth drive if you wished to implement an online spare.

With what you have, if you wish an online spare, then your only real option is two drives configured RAID 10 with the third drive configured as the spare.  This would limit your storage capacity to the size of a single drive though.

If you let me know which way you want to go, I will try and find an article to guide you.  Essentially you have two routes.  A GUI method with the ACU in HP SmartStart, or manual configuration via the bios ACU.

Author

Commented:
I will go with raid 5 and please post me tutorial for manual configuration with via the bios ACU.
David NeedhamFreelance Consultant
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Commented:
Ok.
This one is a little vague, but will hopefully be detailed enough to help you setup your first RAID 5 Array:

http://itknowledgeexchange.techtarget.com/itanswers/raid-to-hp-proliant/
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Distinguished Expert 2019
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In other words "Press F8 when the Smart array controller initialoses and in ORCA you can select to create a new logical drive, it will default to 3 drives in RAID 5 anyway."

Author

Commented:
At the moment ,If i setup Raid 5 with these 3 hard disks without the hot spare and at later stage , if i buy another 300gb Hard disk will i be able to  configure as a spare on this server.
David NeedhamFreelance Consultant
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I don't believe that this is possible via the ROM/BIOS ACU, but it might be possible with the GUI ACU that you should be able to download still.
Natty GregIn Theory (IT)
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Raid 10 is what you should be using for fault tolerance and performance, however raid 10 is not available for software, its a hardware platform. so your next best is raid 1, if you do not have raid hardware.

here is a youtube video setting up raid 1 on windows 8, similar setup for other windows os

https://www.youtube.com/watch?v=RT_0lNZ57k8
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Commented:
David,

"@Rindi is right to state that RAID 5 is an older technology and less reliable than current RAID options.  But to call it unreliable is not technically correct.  I have used RAID 5 in the past very successfully on HP kit and with very few issues."

Yes we all used RAID-5 successfully in the past, but once spindles get above 750GB or so, the risk of a second disk failure during the rebuild of the first failure (because rebuilds are taking too long), becomes unacceptably high, and as the capacities go up so does the risk, its for this reason RAID-5 can now be described as unreliable.
David NeedhamFreelance Consultant
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Gerald,

I completely agree!  But Lianne has already stated that she is using 300GB drives.  So the limitations of RAID 5 don't really come into play in this scenario!
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Commented:
David, thats why i put a lower limit in my post so that you couldnt wriggle out of your generalism!
David NeedhamFreelance Consultant
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Nonsense Gerald!  There was no generalism ( as you put it ).  The simple fact remains that with the kit being used, there is no issue with using RAID 5 and it would indeed be the most efficient method in this instance.