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#1 2011-05-09 14:00:10

cnitso
New member
Registered: 2010-12-12
Posts: 3

Synchronizing Raid 1 Taking Forever

I have 2 x 2TB WD WD2001FASS drives that have fallen out of sync due to a power failure.  As far as I can tell the drives are okay, since the DNS-323 is not reporting any errors.  The drives are about 75% full and are usually lightly used to stream media. 

The problem I'm having is the time it's talking to resync the drives which has been going on for nearly 3 days now.  The unit has been used very little during the resync process with the only activity being the access of a Outlook pst folder a couple times a day.   The estimated time to complete the resync fluctuates between 6,000 mins to 25,000 mins.  Yep, that's between 4 to 17 days.  Is this normal and is there anything I can do to speed up the process, such as pull one of drives, wipe the partition and re-insert to allow the raid array to be rebuilt?

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#2 2011-05-09 15:12:43

petasis
Member
Registered: 2007-06-23
Posts: 39

Re: Synchronizing Raid 1 Taking Forever

It took me ~1 day to copy 500 GB from one disk to another on the DNS. It is quite slow...

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#3 2011-05-09 17:18:46

FunFiler
Member
Registered: 2010-05-23
Posts: 577

Re: Synchronizing Raid 1 Taking Forever

The best way to ensure there is no activity would be to disconnect the network cable for a while. Keep in mind that other internal processes (media server scanning etc) also slow down the resync, not just external activity.


3 * (DNS-323 with 2 * 2TB) = 12TB Running FW v1.08 & FFP v0.5
Useful Links: Transmission, Transmission Remote, Automatic

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#4 2011-05-09 22:49:05

cnitso
New member
Registered: 2010-12-12
Posts: 3

Re: Synchronizing Raid 1 Taking Forever

I had the UPnP server enabled.  After turning it off the resync time dropped to 180 min. 

Thanks.

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#5 2011-05-10 00:05:54

FunFiler
Member
Registered: 2010-05-23
Posts: 577

Re: Synchronizing Raid 1 Taking Forever

That is definitely resource intensive smile

Pretty much any disk activity kills (slows to a crawl) the rebuild process. It's just too much for the low end hardware to handle. This device really isn't built for multi-user access. The device is pretty good at doing some functions, but is not designed (nor intended at the price) to be competative with a PC.

Glad to hear it resolved your issue (or at least it is counting down from a smaller number of minutes).


3 * (DNS-323 with 2 * 2TB) = 12TB Running FW v1.08 & FFP v0.5
Useful Links: Transmission, Transmission Remote, Automatic

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