Windows 8 and 8.1 Forums


Storage Spaces Dual Parity

  1. #11


    Posts : 2
    windows 8


    Now By no means am I an expert, but I do believe it says you can have/use a dual parity on storage spaces, look under the "New and changed functionality section." https://technet.microsoft.com/en-us/.../hh831739.aspx

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  2. #12


    Quote Originally Posted by wmechnig View Post
    Now By no means am I an expert, but I do believe it says you can have/use a dual parity on storage spaces, look under the "New and changed functionality section." https://technet.microsoft.com/en-us/.../hh831739.aspx
    Thanks for replying wmechnig. You're right you can use dual parity on storage spaces but only in Server 2012. If you get a chance to reply to my follow up questions please do.

    So turns out dual parity would of been of great benefit to me if it had been available in Windows 8. I had a single drive fail (1 of 8) Storage Spaces kept working as it should. The next time I turned on the computer, it said reduced resiliency. I went into SS, it was rebuilding. Unfortunately it went through the rebuilding process every time I turned on the computer. Never getting past reduced resiliency which meant copying files off the SS would transfer at a blistering 700kb/s. So I couldn't save the 10 TB/s of data from SS unless I had a spare 2 years. A few hours later one of the drives was listed as Stale, enable pool. With no options to do anything to fix a stale disk in SS, or find any steps to take in google. Soon the stale drive moved to a disconnected stage then an unused stage asking to be removed and Storage Spaces became inaccessible. Next step is to replace the failed drive and hope. It does make me wonder if Parity is feasible for groups of 7 or more 2TB+ Disks.
    Last edited by danielgrey; 07 Mar 2015 at 21:45.
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  3. #13


    Quote Originally Posted by danielgrey View Post
    Thanks for the info. I have 8x2tb drives and I will be storing a large amount of video footage indefinitely. I want the safest option for storing my clients footage.
    If you get nothing else from this post, make sure that you remember this: RAID and/or STORAGE SPACES are not a substitute for backups. RAID is redundancy for your hard drives, but should never be a substitute for proper backups.

    The safest option without question is to make multiple backups, and keep those backups offsite.

    Quote Originally Posted by danielgrey View Post
    have read that raid 5 fails during rebuilds when using a lot of HDDs. I'm assuming Single Parity on storage spaces is similar to Raid5.
    When you have a RAID array that contains any type of parity, when a drive fails and is replaced, you put a good amount of wear and tear on all of the remaining drives when they read the data and parity and rebuild the array. Since all of the drives will be working hard during a rebuild, it is during this time that you have the most risk of a drive failure. It has nothing to do with the # of drives however...other than if you have 10 drives, versus 5 drives, you have more drives that "could" potentially fail.

    As far as safety goes, and speed goes a RAID 10 is the best option. With a RAID 10 you get the speed benefits of the stripe without the write penalty involved with having parity. However, the downfall is that you only get 1/2 of your raw space as usable with RAID 10. But you can have multiple hard drive failures in a RAID 10 without catastrophic loss, as long as they are NOT both members of the same stripe. For example, drives 1-2, 3-4, 5-6, 7-8, 9-10. You could have #1 fail, #3 fail, #6 fail, #8 fail and #9 fail and you could still keep going. You just cannot have drives #5 and #6 fail at the same time or you lose that section of the stripe. Make sense???
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Storage Spaces Dual Parity
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