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Upgrading disks on existing RAID5

Tom Giannoukakis
Occasional Contributor

Upgrading disks on existing RAID5

Hi, currently we have an array with 5 x 36gb HDD. We would like to upgrade the disks to 72gb without deleting the array and creating a new one. I know if we replace one 36 with a 72, it downgrades the 72 to 36 in the array. Any ideas? thanks
13 REPLIES
Torsten.
Acclaimed Contributor

Re: Upgrading disks on existing RAID5

Hi Tom,

what kind of array we're talking about?

Hope this helps!
Regards
Torsten.

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Tom Giannoukakis
Occasional Contributor

Re: Upgrading disks on existing RAID5

hi, it's logical drive with RAID5. thanks
Torsten.
Acclaimed Contributor

Re: Upgrading disks on existing RAID5

RAID stands for technology, but I ask for hardware.

Hope this helps!
Regards
Torsten.

__________________________________________________
There are only 10 types of people in the world -
those who understand binary, and those who don't.

__________________________________________________
No support by private messages. Please ask the forum!

If you feel this was helpful please click the KUDOS! thumb below!   
Tom Giannoukakis
Occasional Contributor

Re: Upgrading disks on existing RAID5

hi, Server is a Proliant DL380 G3, card is a Smart Array 5i. thanks
Volker Spies
Trusted Contributor

Re: Upgrading disks on existing RAID5

Hello Tom,

grab a 200GB IDE Harddrive, take an Image of the existing RAID Arry (with ghost or Acronis true image)

Remove the 36GB HDD's inser the 73GB HDD's build your new Array.

Take the image and ghost it back to the array. (Expanding the partitions to the new size)

Sounds stupid, but worked for me 20+ times.

If it doesn't work put your 36Gb Disk back in place and your server is up and running with the old configuration.

Depending on the RAID controller it could take several hours to ghost 100GB. So this is not an option if you have littel downtime. But I'm not aware of a raid controller where you can expand your array on the fly with a running OS.

Volker
Steven Clementi
Honored Contributor

Re: Upgrading disks on existing RAID5

Tom:


You can easily swap out each disk, one at a time ... waiting for each one to rebuild. The process can take a longer time, but your server stays up and running the whole time.

After you swap out and rebuild the last drive, you will have the extra space available to you for logical drive expansion and/or creation.


Steven
Steven Clementi
HP Master ASE, Storage and Clustering
MCSE (NT 4.0, W2K, W2K3)
VCP (ESX2, Vi3, vSphere4, vSphere5)
RHCE
NPP3 (Nutanix Platform Professional)
Prashant (I am Back)
Honored Contributor

Re: Upgrading disks on existing RAID5

Hi,

Steven is 100% correct about it
See the example from HP to do so.
http://h10025.www1.hp.com/ewfrf/wc/genericDocument?lc=en&cc=us&docname=lpn14582

No doubt go for it

Regards,
Prashant S
Nothing is impossible
Volker Spies
Trusted Contributor

Re: Upgrading disks on existing RAID5

Hello all,

ok you are righ´t, but with this you have an extra logical drive. You have no additional free space on the existing partitions.

I don't know what Tom wants, but in most cases you want to have more free space on your existing partitions, rather then an extra drive.

Volker
Steven Clementi
Honored Contributor

Re: Upgrading disks on existing RAID5

Logical Disks/partitions can easily be expanded too.

Depending on Tom's current Logical Drive set up, he can either use a free utility from Microsoft (Diskpart) to extend data partitions or may have the need for some other 3rd party utility.


If you have a moment Tom, describe to us your current disk layout so that we can give you more options...

Do you have 1 Logical drive with partition in your OS? or do you have 2 logical drives? one for your System disk and a seperate one for data?



Steven
Steven Clementi
HP Master ASE, Storage and Clustering
MCSE (NT 4.0, W2K, W2K3)
VCP (ESX2, Vi3, vSphere4, vSphere5)
RHCE
NPP3 (Nutanix Platform Professional)
Tom Giannoukakis
Occasional Contributor

Re: Upgrading disks on existing RAID5

first of all, thanks to all of you for the great feedback!

Steven - the server has one disk array, with 2 logical drives, one for boot/os and another one for data.

I'm trying to cleanup the mess I inherited :)

thanks
Steven Clementi
Honored Contributor

Re: Upgrading disks on existing RAID5

Sounds like your in perfect condition to use the free utility, unless of course your looking to expand your C: drive.

If you just want to expand your data drive, swap the disks... once t hey are alll swapped you will have the free space available to extend your logical drive. Once you extend it to where you want it, in Windows (Yes, i never did ask what OS so i am assuming here..) Disk Management, you should see your data drive and the original partition as well as some "Free space" at the end.


Disk Part info... http://support.microsoft.com/default.aspx?scid=kb;en-us;325590

Basically with diskpart...(it drops you into a shell sorta like ftp or telnet)

you run...

LIST VOLUME --> shows a listing of selectable volumes
SELECT VOLUME --> selects the volume you want to extend
EXTEND --> extends the partition on the fly


Steven
Steven Clementi
HP Master ASE, Storage and Clustering
MCSE (NT 4.0, W2K, W2K3)
VCP (ESX2, Vi3, vSphere4, vSphere5)
RHCE
NPP3 (Nutanix Platform Professional)
Tom Giannoukakis
Occasional Contributor

Re: Upgrading disks on existing RAID5

thanks for all the help, I think I'm good to go! Tom
Steven Clementi
Honored Contributor

Re: Upgrading disks on existing RAID5

Good to hear. Let us know how things go and/or if you have any other issues.


Steven
Steven Clementi
HP Master ASE, Storage and Clustering
MCSE (NT 4.0, W2K, W2K3)
VCP (ESX2, Vi3, vSphere4, vSphere5)
RHCE
NPP3 (Nutanix Platform Professional)