I've been stalking out a good replacement for Windows Storage Spaces and am interested in DrivePool's behavior as an alternative pooling solution. Since it's file-based and not block-based though, I was wondering:
1) Suppose I have large, changing files like an Outlook .pst or virtual hard drives stored on the pool with duplication enabled. What happens when the file is modified/appended to? Does the entire file need to be duplicated again? ie: does it get copied again in its entirety to other drives or does it do something fancy like rsync's rolling hash strategy to calculate differences and update each file incrementally?
I'm trying to avoid saving gigabytes of information every time I use a .vhd or when Crashplan backs up, since Crashplan relies on many 4GB files.
2) What happens when a drive begins to fail for some reason and an error occurs while reading a certain file? Does DrivePool pull the file from another drive?
I ask because I've experienced corruption from a SMART failure on a drive recently which made reading certain files from a pool error out. This should have been solved by pulling the file from a different drive in the pool but it didn't.
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Penryn
I've been stalking out a good replacement for Windows Storage Spaces and am interested in DrivePool's behavior as an alternative pooling solution. Since it's file-based and not block-based though, I was wondering:
1) Suppose I have large, changing files like an Outlook .pst or virtual hard drives stored on the pool with duplication enabled. What happens when the file is modified/appended to? Does the entire file need to be duplicated again? ie: does it get copied again in its entirety to other drives or does it do something fancy like rsync's rolling hash strategy to calculate differences and update each file incrementally?
I'm trying to avoid saving gigabytes of information every time I use a .vhd or when Crashplan backs up, since Crashplan relies on many 4GB files.
2) What happens when a drive begins to fail for some reason and an error occurs while reading a certain file? Does DrivePool pull the file from another drive?
I ask because I've experienced corruption from a SMART failure on a drive recently which made reading certain files from a pool error out. This should have been solved by pulling the file from a different drive in the pool but it didn't.
Thanks!
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