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PERC H200 - Rebuild Performance

In the middle of rebuilding a RAID 10 array with 4x 600GB 15k SAS drives and the speed of the rebuild is really poor (10hrs to get to 45%) are other users of this card finding this is an issue?

I have seen that it can be improved by enabling the Disk Write Cache on the controller which is off by default & the ability to enable it appears to be removed, doing some additional research has throw up loads of post of DONT enable it as the H200 doesnt had a battery backup on the card.

Have people on here enabled it and did it make a difference & have you had any issues with it.

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