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iamaidiotFlag for United States of America

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Raid 5 expansion dell R620 Perc mini h710 controller

Hello,
We have a raid 5 cofiguration, and running out of space.  It is on a dell server r620 with perc h710 mini (embeded) controller.  If I were to replace one hard drive at a time to bigger size and let it rebuild .. will I be able to increase the size of the volume on the raid without having to backup and restore?

I have read contradictory information and I want to make sure, for example below is a link that gives step by step on how to achieve this.

https://community.spiceworks.com/how_to/919-expand-a-raid-volume

Thanks
Avatar of Member_2_231077
Member_2_231077

I wouldn't follow that guide if I was you, dynamic disks indeed!

H710 does support swapping for larger disks, previous PERCs did not.

https://www.dell.com/support/article/us/en/04/sln156106/reconfiguration-of-virtual-disks-on-the-poweredge-raid-controller-perc-h310-h710-h710p-and-h810?lang=en

" Free space is also available when a disk group´s physical disks are replaced by larger disks using the Replace Member feature. "
Avatar of Tom Cieslik
On H730 it's possible so I think on H710 too.
Just replace disk one at the time and let Raid 5 rebuild.
When you finish with 3rd disk, go to controller Bios and under Virtual Disk, select option Expand Volume.

You should be able to do it, but this is very risky since you must degrade your Raid  3 times and pray it will rebuild.
Make sure you have full backup of your whole system.

Here you can find video how they doing on H730, make sure you have same options in menu.

https://www.youtube.com/watch?v=LkFDzerdD0w
>but this is very risky since you must degrade your Raid  3 times

Not if there is a spare disk bay and you use the "replace member" feature, it copies the disk first so there's always parity. Mind you if there is a spare bay it may be better to just add one more disk to the array.
Avatar of iamaidiot

ASKER

Thank you guys for all the information.  I dont have a spare bay but I do have a global hot spare
Great; delete the global spare (probably no use for this array any more anyway) and use the slot for the replace member method, then there is no risk of losing parity. You have to enable revertible hot spares to see the replace member feature.

It's much quicker too as instead of rebuilding RAID5 each time it just copies from one disk to another.
Another question when the vd volume gets extended would i need to expand it on windows server 2008 r2 as well?  I have had replaced hard drives on this server and it did rebuild with no issues hopefully that will be the case and I will have backups ofcourse to make sure if something goes wrong there wont be an issue.
You can reconfigure the VD using OMSA to make it bigger and then extend with diskpart (or partition mangler in more recent versions of Windows).

Be aware if this is boot volume or has OS on it do not extend past 2TB, if it is a data volume you still can't extend past 2TB in general but depends if it is MBR or GPT.

Also be aware that expansion may not work with sliced volumes, "sliced" means two logical disks on one set of spindles.

Post screenshots from disk management and we will confirm.
Open Manage System Administrator will be the best to use for You, like andyalder said.
Is more secure way to play with RAID Array since program will not allow you to destroy active array when Windows is using it.

Controller BIOS doesn't care about it :)
Thank you guys so much.  I actually restarted the server and found out that there is only one VD and not two(originally thats what i thought).  so when the os was installed two partitions were created one for os and another for data.  I need to extend the data.  Not sure if this is still possible.  I have attached screenshot of diskmgmt @andy
If you must extend DATA partition only and You'll get free space you can use Windows Disk Manager to do it or AOMEI   Partition Assistant Server Edition
Finally I am ready to expand the volume ( i have attached pic).. E drive is the drive i need to expand. My question is if I go over 2 tb will it cause issues?  Do I have to convert to dynamic before expand the volume on the E drive.  I am not touching the C drive which is the os
udamhdd.JPG
NO, you don't need to convert disk to Dynamic.
Just select volume, right click on it end option "Expand Volume" should be available for you now
You can't go past 2TiB (2.2 TB) with MBR disk, you have to convert it to GPT if you want to exceed that size, EaseUS or other partition manager will convert it to GPT for you or you can use diskpart but make sure you don't wipe the data. You can also create several logical disks on the array that are less than 2TB and concatenate them but that does involve dynamic disks and isn't recommended.
andyalder - I assume GPT is the disk format he has now
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