NetBSD 5 upgrade & SCSI issues

[John Klos <john%ziaspace.com@localhost>]

Hi,

I just upgraded a PowerMac 9600 with an ATTO UL2D SCSI card, an Acard 
SCSI-SATA adapter, and a hardware mirroring SATA enclosure from NetBSD 4 
to NetBSD 5, and I'm now seeing SCSI issues I didn't see with NetBSD 4. 
The machine runs, and appears to be fine, but it's not reassuring to see 
these:

sd0(esiop1:0:0:0):  Check Condition on CDB: 0x35 00 00 00 00 00 00 00 00 00
    SENSE KEY:  Media Error
     ASC/ASCQ:  Data Synchronization Mark Error

sd0(esiop1:0:0:0):  Check Condition on CDB: 0x35 00 00 00 00 00 00 00 00 00
    SENSE KEY:  Media Error
     ASC/ASCQ:  Data Synchronization Mark Error

(lots and lots of these)

Here's the SCSI stuff from dmesg:

esiop0 at pci0 dev 13 function 0: Symbios Logic 53c896 (ultra2-wide scsi)
esiop0: using on-board RAM
esiop0: interrupting at irq 23
scsibus0 at esiop0: 16 targets, 8 luns per target
esiop1 at pci0 dev 13 function 1: Symbios Logic 53c896 (ultra2-wide scsi)
esiop1: using on-board RAM
esiop1: interrupting at irq 23
scsibus1 at esiop1: 16 targets, 8 luns per target

...

sd0 at scsibus1 target 0 lun 0: <ATA, InneRAID D Duo, 1.04> disk fixed
sd0: 931 GB, 484505 cyl, 64 head, 63 sec, 512 bytes/sect x 1953525168 sectors
sd0: sync (25.00ns offset 14), 16-bit (80.000MB/s) transfers, tagged queueing

Has anything changed that anyone knows about which could account for this?

Thanks,
John Klos