Replacing 2 drives in a RAID 5

Anti-Mhz
Anti-Mhz used Ask the Experts™
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I have 2 drives in a RAID 5 environment that I would liek to replace with the new ones. Im afraid to lose the data that is currently existing in this setup. How can I replace the two drives and keep the data intact? What if I was to replace just one drive?
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Top Expert 2009
Commented:
That is exactly what you need to do, replace one drive at a time. If you can get a full backup before doing this, it is a best pratice
LBizzleMicrosoft Enterprise Administrator & AWS cloud Consultant

Commented:
You replace one drive; wait for it to finish initializing and for the RAID build to complete then you put in the second drive. Don't just do one and then 20 seconds later swap out the other or you will likely loose data.

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Commented:
how can I know when the drive is fully  initialized. . these are 60 gig drives. with  274 gigs total storage with 5 60 gig storage. can I estimate somehow or is there sure way to find out?
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Microsoft Enterprise Administrator & AWS cloud Consultant
Commented:
Normally, the HD lights will blink differently if this is an external enclosure where you can see the lights. Or, there may be a tool like HP Insight manager. If these are internal disks with no external lights to speak of and no RAID controller software to use then I would wait 3 hours. That should be enough time to ensure everything has replicated properly.
It depends on your raid controller.  If you open the configuration during boot, it will tell you the state of your raid set.  If the set state is degraded or rebuild then it has not finished.  If it is in a healthy state or normal, then it has finished.  For 60 gig it should take about 1 hr.   Like Charlestasse said, make sure that you have a full backup before trying.
LBizzleMicrosoft Enterprise Administrator & AWS cloud Consultant

Commented:
Only problem is that if this is a software RAID and you reboot to look at the configuration state it will start all over again once the OS has booted back up.

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