Solved

RAID Query - Hard Drives

Posted on 2013-06-11
8
456 Views
Last Modified: 2016-12-08
Hi EE,

Just a quick question regarding hard drives in a RAID group.
If we had a hard drive failure, and needs replacing, and we cannot source the same hard drive, do we just find a hard drive with same size and speed regardless of its model?

Cheers
Goraek
0
Comment
Question by:goraek
  • 5
  • 2
8 Comments
 
LVL 14

Expert Comment

by:theras2000
ID: 39239975
It's generally fine to use any drive as long as it's the same or bigger capacity.  Obviously you also want to it to be the same or better speed/specs so it doesn't bring the group down, but this isn't a requirement.  I've seen/used different drives plenty.
0
 
LVL 2

Author Comment

by:goraek
ID: 39239976
Thanks - what if the speed is greater, will this still work? Lets say I went from 7200 to 15000? Will this affect the rest of the raid?
0
 
LVL 2

Author Comment

by:goraek
ID: 39239982
Also to add - if I want to upgrade the hard drives in the raid:

EG. 5 x 1TB 7200 to 5 x 2TB 15000 (will this be ok?)
0
Best Practices: Disaster Recovery Testing

Besides backup, any IT division should have a disaster recovery plan. You will find a few tips below relating to the development of such a plan and to what issues one should pay special attention in the course of backup planning.

 
LVL 47

Expert Comment

by:dlethe
ID: 39239987
No, it is not generally fine to just replace a HDD with any other HDD of >= capacity.   Best practice is to

1. Check the manufacturer to see what HDDs are specifically qualified.  Not all HDDs are the same, especially SATA drives.  Consumer SATA disks don't have the right firmware to work properly with most RAID controllers.

2. Assuming the 15K HDD is on manufacturer's supported list, then go for it.  The faster drive will result in slightly faster performance all around.
0
 
LVL 2

Author Comment

by:goraek
ID: 39240016
Ok.

In my case, I have 2 x Seagate ST31000528AS 931 GB. One of them had died on me. And I need to replace it quick before the other one goes!

And I believe this particular model does not exist anymore (its been discontinued), however there are some out there, but I would rather upgrade the hard drive.

What is my best scenario?
0
 
LVL 2

Author Comment

by:goraek
ID: 39240021
By the way, the spec is SATA2, 32MB cache, 7200rpm. Would be good if I can upgrade. And its a Netgear ReadyNAS unit.
0
 
LVL 47

Accepted Solution

by:
dlethe earned 500 total points
ID: 39240035
This is a simple thing to do.  Look at the netgear site and check their HCL.  Surely they have qualified other 1TB disks.  

Save yourself the time and grief of risking data loss by just asking Netgear what 1TB HDDs they support.  But just any HDD will not do. Get a 'green' disk, or one with 4KB sectoring and you may end up regretting the decision because such things expose you to data loss.

Heck, windows software RAID won't support doing software RAID1 with a Seagate drive and just about any recent model of WD disk drive because the Seagates are 512 byte sectoring, and most of the consumer class WD drives have 4KB sectoring.  If you try to do this, it will give an error.  Think about it.  Firmware and settings matter more than you think, especially in a RAID config.
0
 
LVL 2

Author Closing Comment

by:goraek
ID: 39289623
Thanks for the info
0

Featured Post

PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

In the modern office, employees tend to move around the workplace a lot more freely. Conferences, collaborative groups, flexible seating and working from home require a new level of mobility. Technology has not only changed the behavior and the expe…
A clone is a duplicate copy. Sheep have been cloned and maybe someday even people will be cloned, but disk cloning (performed by the hard drive cloning software) is a vital tool used to manage and protect data. Let’s look at what hard drive cloning …
This video Micro Tutorial explains how to clone a hard drive using a commercial software product for Windows systems called Casper from Future Systems Solutions (FSS). Cloning makes an exact, complete copy of one hard disk drive (HDD) onto another d…
This Micro Tutorial will teach you how to reformat your flash drive. Sometimes your flash drive may have issues carrying files so this will completely restore it to manufacturing settings. Make sure to backup all files before reformatting. This w…

786 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question