Problems with SiI 3112 SATA RAID controller

ata2: no sense translation for status: 0x51
ata2: translated ATA stat/err 0x51/00 to SCSI SK/ASC/ASCQ 0x3/11/04
ata2: status=0x51 { DriveReady SeekComplete Error }
ata2: no sense translation for status: 0x51
ata2: translated ATA stat/err 0x51/00 to SCSI SK/ASC/ASCQ 0x3/11/04
ata2: status=0x51 { DriveReady SeekComplete Error }

2.4.33-pre3 kernel, CONFIG_SCSI_SATA_SIL driver, EIO DM-8301R SATA RAID card:

libata version 1.20 loaded.
PCI(00:0c.0): version 0.9
ata1: SATA max UDMA/100 cmd 0xD080C080 ctl 0xD080C08A bmdma 0xD080C000 irq 11
ata2: SATA max UDMA/100 cmd 0xD080C0C0 ctl 0xD080C0CA bmdma 0xD080C008 irq 11
ata1: dev 0 cfg 49:2f00 82:746b 83:7f01 84:4023 85:7469 86:3c01 87:4023 88:407f
ata1: dev 0 ATA-7, max UDMA/133, 488397168 sectors: LBA48
ata1: dev 0 configured for UDMA/100
ata2: dev 0 cfg 49:2f00 82:746b 83:7f01 84:4023 85:7469 86:3e01 87:4023 88:407f
ata2: dev 0 ATA-7, max UDMA/133, 488397168 sectors: LBA48
ata2: dev 0 configured for UDMA/100
scsi0 : sata_sil
scsi1 : sata_sil
  Vendor: ATA       Model: WDC WD2500KS-00M  Rev: 02.0
  Type:   Direct-Access                      ANSI SCSI revision: 05
  Vendor: ATA       Model: WDC WD2500JS-55N  Rev: 10.0
  Type:   Direct-Access                      ANSI SCSI revision: 05
Attached scsi disk sda at scsi0, channel 0, id 0, lun 0
Attached scsi disk sdb at scsi1, channel 0, id 0, lun 0

Partial solution to DMA/write errors – BIOS upgrade:

http://www.siliconimage.com/search/searchresults.aspx?keyword=3112+bios

(4.2.76 at the time of writing)