Differences between disk controllers

Hi,

Running:
	FreeBSD 10.0-STABLE #0 r262730

I've build a ZFS system, with 4 disks on a regular Marvell controller,
and 4 disks on an Areca controller.
Disk are 4T WD REDs.

I noticed that there were some discrepancies when I build a raidz of 4
"marvell" disks when compared to a raidz on the Areca controller.

The essential difference is that on the basic controller the disks are
recognised as being 4K disks with quirks.
On the Areca controller there is no quirk that matches...

Is this a typical problem on the Areca controller?
Or does this not work?

Thanx,
--WjW


Basic:
mvs0: <Marvell 88SX7042 SATA controller> port 0xb800-0xb8ff mem
0xfcd00000-0xfcdfffff irq 16 at device 0.0 on pci4
mvs0: Gen-IIe, 4 3Gbps ports, Port Multiplier supported with FBS
ioapic0: routing intpin 16 (PCI IRQ 16) to lapic 0 vector 53

With disk:
ada0 at mvsch0 bus 0 scbus1 target 0 lun 0
ada0: <WDC WD40EFRX-68WT0N0 80.00A80> ATA-9 SATA 3.x device
ada0: Serial Number WD-WCC4E0918074
ada0: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
ada0: Command Queueing enabled
ada0: 3815447MB (7814037168 512 byte sectors: 16H 63S/T 16383C)
ada0: quirks=0x1<4K>

And:
arcmsr0: <Areca SATA 3G Host Adapter RAID Controller (RAID6 capable)
arcmsr version 1.20.00.28 2013-09-13
> mem 0xfcbff000-0xfcbfffff,0xfb800000-0xfbbfffff irq 18 at device 14.0
on pci3
Areca RAID adapter0: ARC-1220 F/W version V1.49 2010-12-02

With disk:
da0 at arcmsr0 bus 0 scbus0 target 0 lun 0
da0: <WDC WD40EFRX-68WT0N0 R001> Fixed Direct Access SCSI-5 device
da0: Serial Number WD-WCC4E0959610
da0: 250.000MB/s transfers (125.000MHz, offset 32, 16bit)
da0: Command Queueing enabled
da0: 3815447MB (7814037168 512 byte sectors: 255H 63S/T 486401C)
da0: Delete methods: <NONE(*)>

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