Notes in installing a Sun 3510 disk array
Spent the day with a Sun Engineer working on getting a Sun SE3510 Array installed on one of our E25K machines. Here is some background:
12 x 300gb FC drives in the array, 2 assigned as Global spares, and the rest were assigned to 2 RAID 5 arrays of 5 disks each. One array on each controller. Now comes the fun part. Because of the way that the firmware on the controllers works (we have redundent controllers in the 3510 and 2 qlogic cards in the E25K domain) we had to connect 4 links between the 3510 to our San Director. So we have something that looks sort of like this:
What this produces is 3 Luns from the primary controller and 3 luns from the secondary controller being visible on each of the qlogic cards. On the host side we are using MPxIO to handle the multipathing. So if you are trying to do the same thing, remember that you need 4 connections from the Array to the SAN Fabric, 2 to each fabric, if you have different fabric domains. Otherwise, you will end up with only seeing half of the disks on each controller and you will not be in a redundent state. If you try to directly attach the array to the host, then you still need 4 connections and will have to use dual ported cards.. Sun needs to update the firmware on this device so you can make the luns appear on each controller with out having to use 4 different connections and still be redundent.
