Tom's Hardware > Forum > Storage > NAS/RAID & Technologies > WHS: what happens when one or more drives fail?

WHS: what happens when one or more drives fail?

Forum Storage : NAS/RAID & Technologies - WHS: what happens when one or more drives fail?

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anon6   10-20-2009 at 08:40:12 AM

I'm not clear on how WHS writes files to the harddrives. When you copy files to WHS how are the files distributed / what file system does it use? So if one or more drive fails, do you just lose the data on that drive? Is it possible to know what files you have lost?

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vibe   10-20-2009 at 05:44:01 PM

depends on how the servers drives are setup

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HappyBison   10-20-2009 at 11:30:07 PM

It depends if you have some kind of RAID or not.

 

If not, then you loose all files on that particular drive.

 

If you have a RAID, it depends on the type of RAID.
RAID0 (stripping) will loose all your data.
RAID1 (mirroring) will not loose any data, as long as you have one drive working.
RAID5 (parity) will not loose any data, as long as you have one drive failed only.
RAID6 (dual parity) will not loose any data, as long as you have up to 2 drives failed only.

 

You can check more information on RAID here:
http://en.wikipedia.org/wiki/RAID


Message edited by HappyBison on 10-20-2009 at 11:31:28 PM
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anon6   10-20-2009 at 11:54:37 PM

WHS is not RAID. Does anyone know about WHS?

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HappyBison   10-21-2009 at 01:50:53 AM

AFAIK, WHS is Windows Home Server Operating System.

It's all up to you how you configure your own storage on it. If you have a pre-built system with WHS, then you can check your particular model on how a manufacturer configured it for you (AFAIK, Acer configured theirs as doing a constant file synchronization from one drive to another -- similar to RAID1, but less proof).

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HappyBison   10-21-2009 at 02:01:28 AM

Here is some info on that.
This is how it's implemented by Microsoft natively using non-RAID controller:
http://www.microsoft.com/DownLoads [...] laylang=en
(Starting with Page 10 and so on).

IMHO it's still possible to use a RAID hardware controller with it, this way all data redundancy will be done by your controller and not OS. Although, I personally did not try it.

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