Mark Lord wrote:

David Greaves wrote:

quoted

scsi1 : sata_sil
  Vendor: ATA       Model: Maxtor 6B200M0    Rev: BANC
  Type:   Direct-Access                      ANSI SCSI revision: 05
  Vendor: ATA       Model: Maxtor 6B200M0    Rev: BANC
  Type:   Direct-Access                      ANSI SCSI revision: 05

I wonder if the non-FUA component here is the sata_sil,
rather than the two Maxtor drives.

Also, your drives have different firmware,
but both have trouble with FUA here.

sata_sil is indeed a piece of hardware that needs to know the opcodes 
ahead of time...

	Jeff