Sorry for my english.

We have a IBM BLADES JS21. AIX 5.3 update to 6.

Our JS21 has 2 FC (fcs0 and fcs1).

We have one DS4072, one Disk system with 2 controllers and 2 FC by controllers.

This means, all AIX FC see all Disk systems controllers by 2 FC switchs. (one fc two roads)

FC AIX -----> SWITCH A <----- 2 FC Controllers. A1 - B1
FC AIX -----> SWITCH B <----- 2 FC Controllers. A2 - B2

Is it support?. Because I only see one DAR (it is correct because I have only on partition on my Disk System). But I see 4 DAC ( DAC0 - DAC3 ) and I can not configure fault tolerant.

Thanks.