Just thought I''d share some recent experiences. I had an Adaptec ASH-1233 PCI controller (based on the Silicon Image SII0680ACL144 chip) in my Nevada build 45 system (a white box PC based on the AMD 3200+ CPU). This system is the backup for my main home server. Using zfs send | rsh zfs receive to copy the data, I was only getting about 4MB/sec to a RAIDZ1 pool of 4 X IDE 300GB drives (2 on the internal IDE controller and 2 on the Adaptec). I swapped the Adaptec for the "generic" CompuUSA PCI "ULtra ATA / 133 PCI Card". It''s SKU 293595. It''s based on the ITE IT8212F. I give you the details because with the same disk, just swapping controllers, I''m now moving on average 34MB/sec. This message posted from opensolaris.org