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Replacing a disk of RAID 5 on NetServer LC2000 U3

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B. GAUTIER
Occasional Visitor

Replacing a disk of RAID 5 on NetServer LC2000 U3

One of my drives is failed (red lights on it). Drives are hot plug (on RAID 5)

What is the procedure to replace this disk ? Do i have only to remove it and insert the new one with windows server 2003 running ? the rebuild is automatic ?
Do i have to use NetServer Navigator ?

Thanks a lot for your answers, i just want to be sure of the operation

Regards
Benoit

15 REPLIES
B. GAUTIER
Occasional Visitor

Re: Replacing a disk of RAID 5 on NetServer LC2000 U3

I would like to add that the "new" disk i plan to install in replacement has already been use in another RAID 5 somewhere else (exactly same physic specifications)

Will it work with this one ?

Thanks
kris rombauts
Honored Contributor
Solution

Re: Replacing a disk of RAID 5 on NetServer LC2000 U3

Benoit,

their is no issue in re-using a disk that was part of another raid set IF you insert the disk online in your current server that needs a disk rebuild.

Do no insert that foreign raid disk when you server is offline or do not reboot the server since this might introduce a problem and confuse the Netraid controller when this disk is present at boot time and it has not been rebuild or started a rebuild into the raid config yet.

So , just plug in that disk online and if the Netraid controller is configureed for automatic rebuild, the rebuild should kick in after a few seconds when the disk is spinned up and ready, you should notice heavy disk activity.

If not, start the Netraid Assistant utility in Windows and manually start a rebuild on the disk that shows up with a status of 'Ready' (the one you newly inserted)

HTH

Kris
B. GAUTIER
Occasional Visitor

Re: Replacing a disk of RAID 5 on NetServer LC2000 U3

Thank you Kris,

So according to you, it is absolutely impossible that data, from the disk i want to include in the array, will be replicated on the 2 others disks ?

Is it possible to configure the "automatic building" from the Bios of the RAID controller (CTRL+M), because, i'm my OS is Windows Server 2003 and no manager available on it ... :-(

Regards,
Benoît
B. GAUTIER
Occasional Visitor

Re: Replacing a disk of RAID 5 on NetServer LC2000 U3

Kris,

Everything worked fine with your advices.

Thanks you.

Benoit
Jarod Lim
Occasional Visitor

Re: Replacing a disk of RAID 5 on NetServer LC2000 U3

I have a similar problem. But I can't find NetRaid Utility. Where is it located?
kris rombauts
Honored Contributor
Ryan Gaudet
Occasional Visitor

Re: Replacing a disk of RAID 5 on NetServer LC2000 U3

I am just waiting for a replacement drive to come in to do the same thing. I have NetRAID Assistant on the server but just want to confirm that I can just remove the failed harddisk with the system online. DO I need to do something in NetRAID to that failed disk before removing?
kris rombauts
Honored Contributor

Re: Replacing a disk of RAID 5 on NetServer LC2000 U3

Ryan,

no, it all goes automatically, remove bad disk, insert new disk, wait a few seconds and the rebuild should start.
If it does not start, the launch the Netraid assistant and that will rescan the bus and kick off the rebuild.

Makre sure you have consistency check service running , this runs a kind of health check of the raid array parity on a weekly basis.

Kris
Bob-SNC
Occasional Advisor

Re: Replacing a disk of RAID 5 on NetServer LC2000 U3

What if you are replacing all three drives in a raid with bigger drives. Can I just replace them one at a time, allowing each one to rebuilt separately like it was a bad drive until each one is replaced?

Thanks
Bob
kris rombauts
Honored Contributor

Re: Replacing a disk of RAID 5 on NetServer LC2000 U3

Bob,

yes you can but the logical drive in the RAID5 array will not be bigger. You will see some unused space.

Kris
Bob-SNC
Occasional Advisor

Re: Replacing a disk of RAID 5 on NetServer LC2000 U3

That is OK, since both servers I am doing this to are strictly drives that hold databases. One is an exchange 2000, the other a Macola (ERP package) database. Thanks for the info.

Bob
Bob-SNC
Occasional Advisor

Re: Replacing a disk of RAID 5 on NetServer LC2000 U3

Kris,

Will Windows 2000 Server see the extra space?
kris rombauts
Honored Contributor

Re: Replacing a disk of RAID 5 on NetServer LC2000 U3

Bob,

you'll have to create a logical drive first in that new free space. I am not sure anymore if this worked fine when rebuilding onto bigger disks, but if it does then the space will be visible in the OS (Windows in this case) as a new disk in disk management.

So, since it is another/additional) logical drive, it is not seen as unused space at the end of the first Windows disk but it is seen as another disk (i.e. disk 1).



HTH

Kris
Bob-SNC
Occasional Advisor

Re: Replacing a disk of RAID 5 on NetServer LC2000 U3

How would I go about making it so I can see it as part of another drive. I have 3 partitions right now. C: D: E: and an Exchange M: I want to add the space to the E:/M: exchange drive.
Bob-SNC
Occasional Advisor

Re: Replacing a disk of RAID 5 on NetServer LC2000 U3

I replaced the 18 GB drives with 36 GB drives. Under NetRAID it sees them each physically as a 36 GB drive. But my logical drive is still only 36 GB total instead of 72 GB. Any idea how I get NetRAID to add this missing space to my logical drive, so I can then use it under Windows. Or even worse case make it an additional logical drive so I can somehow merge my E:/M drive with it.

Thanks

Bob