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Redundant Data & New HD: How Does it Work

Question
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Can somebody explain when my data is safe from a HD failure and how the system handles an event where a new HD is inserted. Here are some cases:
1) 500GB HD = 500GB available, no redundant data
2) 500GB HD, insert 500GB HD = 500GB available, redundant data (mirror)
3) 500GB HD + 500GB HD, insert 500GB HD = 1TB available, redundant data (RAID 5)
4) 500GB HD + 500GB HD, insert 1GB = 1TB available, redundant data (2 HDs mirrored on 1)
5) 500GB HD + 500GB HD, insert 250GB HD = 500GB redundant (mirror) + 250 non-redundant
Are the above scenarios correct?
ThanksWednesday, November 26, 2008 4:26 PM
Answers
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hfaun said:
Can somebody explain when my data is safe from a HD failure and how the system handles an event where a new HD is inserted. Here are some cases:
1) 500GB HD = 500GB available, no redundant data
2) 500GB HD, insert 500GB HD = 500GB available, redundant data (mirror)
3) 500GB HD + 500GB HD, insert 500GB HD = 1TB available, redundant data (RAID 5)
4) 500GB HD + 500GB HD, insert 1GB = 1TB available, redundant data (2 HDs mirrored on 1)
5) 500GB HD + 500GB HD, insert 250GB HD = 500GB redundant (mirror) + 250 non-redundant
Are the above scenarios correct?
Thanks
WHS doesn't use RAID at all (as a matter of fact, RAID on WHS is unsupported). It uses Folder Duplication. It's similar to RAID 1, but it's done on a per-share-basis, not per-drive. As for when you add a drive, it just adds the drive to the storage pool.
You should check the Technical Briefs for more info as to how WHS works.- Marked as answer by T. HeadrickMicrosoft employee Wednesday, November 26, 2008 5:56 PM
- Unmarked as answer by T. HeadrickMicrosoft employee Wednesday, November 26, 2008 5:56 PM
- Marked as answer by hfaun Wednesday, November 26, 2008 6:58 PM
Wednesday, November 26, 2008 5:31 PMModerator
All replies
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hfaun said:
Can somebody explain when my data is safe from a HD failure and how the system handles an event where a new HD is inserted. Here are some cases:
1) 500GB HD = 500GB available, no redundant data
2) 500GB HD, insert 500GB HD = 500GB available, redundant data (mirror)
3) 500GB HD + 500GB HD, insert 500GB HD = 1TB available, redundant data (RAID 5)
4) 500GB HD + 500GB HD, insert 1GB = 1TB available, redundant data (2 HDs mirrored on 1)
5) 500GB HD + 500GB HD, insert 250GB HD = 500GB redundant (mirror) + 250 non-redundant
Are the above scenarios correct?
Thanks
WHS doesn't use RAID at all (as a matter of fact, RAID on WHS is unsupported). It uses Folder Duplication. It's similar to RAID 1, but it's done on a per-share-basis, not per-drive. As for when you add a drive, it just adds the drive to the storage pool.
You should check the Technical Briefs for more info as to how WHS works.- Marked as answer by T. HeadrickMicrosoft employee Wednesday, November 26, 2008 5:56 PM
- Unmarked as answer by T. HeadrickMicrosoft employee Wednesday, November 26, 2008 5:56 PM
- Marked as answer by hfaun Wednesday, November 26, 2008 6:58 PM
Wednesday, November 26, 2008 5:31 PMModerator -
I found the technical document. That's very helpful. Thanks.Wednesday, November 26, 2008 6:58 PM