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    I have a spare server that was to be used as a backup device that has an 8TB hardware RAID 5 array already installed (4 x 2TB drives.) I have the following questions:

    1) I have already lost about 2TB of the 8TB capacity for the RAID 5 Striping - How much more will be lost from Drive Extender

    2) Does Vail understand that the storage pool is a RAID 5 array? Does it do anything differently because of the RAID array?

    3) I note from other forum posts that the WHS team has tested Vail with an 8TB stripped array - How did the configure Vail for that environment?

    Sunday, May 9, 2010 1:37 AM

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    1. 12% overall for ECC, then 50% of the remainder for duplication if you choose to use it by breaking the array up into logical volumes.
    2. Vail doesn't care about, or know about, the array. It won't do anything special just because you're using RAID.
    3. You build an array. You install Vail. If needed you supply storage drivers at an appropriate point. In other words, I believe they did nothing special.

    That said, my recommendation is to break the array and let Windows Home Server have the individual drives. This will allow you to use heterogenous drives in the storage pool, and will allow you to easily grow it when your needs increase.

    I'm not on the WHS team, I just post a lot. :)
    Sunday, May 9, 2010 2:57 AM
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    1. 12% overall for ECC, then 50% of the remainder for duplication if you choose to use it by breaking the array up into logical volumes.
    2. Vail doesn't care about, or know about, the array. It won't do anything special just because you're using RAID.
    3. You build an array. You install Vail. If needed you supply storage drivers at an appropriate point. In other words, I believe they did nothing special.

    That said, my recommendation is to break the array and let Windows Home Server have the individual drives. This will allow you to use heterogenous drives in the storage pool, and will allow you to easily grow it when your needs increase.

    I'm not on the WHS team, I just post a lot. :)
    Sunday, May 9, 2010 2:57 AM
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    If I use WHS as as only a backup device without using the RAID 5 array - It appears that Drive Extender is about the same as RAID 1 with some ECC - Is that correct? So instead of 25% lost for striping, 56% will be lost for duplication and ECC?

    Also, are all backups automatically duplicated unless duplication is turned off?

    Sunday, May 9, 2010 3:53 AM
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    56% is correct, yes. And unless you turn off duplication for the computer backups they will be duplicated.
    I'm not on the WHS team, I just post a lot. :)
    Sunday, May 9, 2010 4:02 AM
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