still getting:

pciide0:0:0: lost interrupt
        type: ata tc_bcount: 8192 tc_skip: 0
pciide0:0:0: bus-master DMA error: missing interrupt, status=0x21
pciide0:0:0: device timeout, c_bcount=8192, c_skip0
wd0a: device timeout reading fsbn 22255456 of 22255456-22255471 (wd0 bn
23828720; cn 23639 tn 9 sn 41), retrying
wd0: soft error (corrected)

both SMART off and on