Raid Channels

Posted on 2009-04-16
Last Modified: 2013-11-14
Hi have a Dell 2850 with 4 hard drives.  2 are on one channel of the Perc 4e/di and 2 on the other channel.  My question is how do I move drives from one channel to another and someone's opinion on set up if I will be doing a 3 drive Raid 5 with 1 hot spare.  should all the drives remain on one channel or is there a performance gain by keeping the 3 drives on 2 separate channels?  
Question by:gsp35
    LVL 2

    Expert Comment

    Speed should be improved in separate channels, but with just four drives (one inactive) the difference is not going to be very noticeable. For migration of the data, I would use Norton Ghost to backup the data before doing anyting, and then creating the array from scratch. And also consider that RAID5 is far slower than RAID1, at least writing.
    LVL 34

    Accepted Solution

    From my experience running a single raid array across channels is a bad idea as it tends not to be entirely stable. To get the drives on the same channel all you have to do is remove the backplane daughter card(this splits the backplane for use with 2 channels) and unplug the scsi cable from the 2nd channel once that is done all 6 drive bays will be on one channel.

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