ISA is not fast

Using a pair of ISA IDE controllers for a mirror, and an ISA NIC is a recipe for sloooooow.

md2 : active raid1 sda3[2] sdb3[1] 425600 blocks [2/1] [_U] [====>................] recovery = 24.3% (104064/425600) finish=10.5min speed=508K/sec

Oh yeah.