Initial creation and regen of mirror takes over a day

May 29, 2008

I just added a mirrored stripe set on my Windows 2000 server (Raid 5+0). It

is a device that allows two RAID 5 setups and I have each setup with 5 of

the 500GB SATAII drives. Total for each RAID 5 array is 2TB usable. I set

Windows 2000 Disk Manager to mirror those arrays. Yes, I know it is

overkill but I have my reasons.

Disk Manager has been showing the mirror "Resyncing" for over 12 hours and I

think at this rate it looks like it has over 24 more hours left. Since

these drives are all blank and the setup is new I thought the process would

be very quick on the initial setup, but that does not seem to be the case.

I don't think it is drive performance because I have just done some speed

testing and even with the resyncing going on I am getting some really

smoking numbers compared to my old two drive mirroring setup.

Why is the resyncing on this blank array taking so long?

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