QNAP Storage HDD Expansion

Hi,

I have a question about my TS420 QNAP NAS system that the QNAP forum are so slow to answer and I cannot wait for weeks.

Recently, I have realized some capacity issues and have decided its time to upgrade my storage drives from 2TB to 4TB.

Currently, there are 4 x 2TB (Model # WDC WD20EFRX-68EUZN082.0) inside the NAS and it is configured as a RAID 5 storage array.

My question is, can I remove one HDD at a time using "hot swap" method and slotting in my new 4TB drives? Will the RAID rebuild itself without losing any data or causing any file corruptions?

Thanks in advance.
Lai
Laila JacksonAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

jmcgOwnerCommented:
The QNAP is advertised to work that way, but I never tried it myself. You'd still want a solid "before" backup and you'll need to be able to see the progress on the RAID rebuild so as not to put the next disk in too early. And I'm also not sure how automatically the new space will be made available once all the drives have been upgraded.
0
andreasSystem AdminCommented:
Read this:

http://www.zdnet.com/article/why-raid-5-stops-working-in-2009/

One bit error during resyncing on the remaining disks and your array is broken.

So its as @jmcg said very important you have a FULL backup of all yout files on the NAS elsewhere.

also 4 times resyncing will stress the disks quite a lot and if you got a bad new one it might fail during resync, also result in data loss.

Its quite risky but it might work.

Here are the instructions for qnap NAS how to extend capacity online.

http://docs.qnap.com/nas/4.1/Home/en/index.html?raid_management.htm

You should exactly follow this and NOT JUST pull one disk and plug a larger one and repeat.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Laila JacksonAuthor Commented:
Thanks heaps. All worked fine.
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Storage

From novice to tech pro — start learning today.