On Thu, Jul 03, 2008 at 10:35:43PM -0600, Robert Hancock wrote: > Justin Piszcz wrote: > >On the motherboard itself (all drives configured for AHCI) > > > >[ 2.360648] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300) > >[ 2.678244] ata1.00: ATA-8: WDC WD3000GLFS-01F8U0, 03.03V01, max > >UDMA/133 > >[ 2.678594] ata1.00: 586072368 sectors, multi 0: LBA48 NCQ (depth 31/32) > >[ 2.684566] ata1.00: configured for UDMA/133 > > > >On the PCI-e cards: > > > >[ 16.136568] ata11: SATA link up 3.0 Gbps (SStatus 123 SControl 0) > >[ 16.155682] ata11.00: ATA-8: WDC WD3000GLFS-01F8U0, 03.03V01, max > >UDMA/133 > >[ 16.156545] ata11.00: 586072368 sectors, multi 16: LBA48 NCQ (depth > >31/32) > >[ 16.162949] ata11.00: configured for UDMA/100 > > > >How come the PCI-e card configured the drive for UDMA/100 and not UDMA/133? > > > >Perhaps the PCI-e card/driver does not configure/have AHCI > >functionality, or? > > > >The mobo: Intel DG965WH > >The card: 03:00.0 RAID bus controller: Silicon Image, Inc. SiI 3132 > >Serial ATA Raid II Controller (rev 01) > > > >The hard drives are the same make/model. > > Not sure exactly why that is (could be an artificial driver difference), > but for SATA I don't think the UDMA mode selection matters at all as far > as throughput. SATA uses its own flow control mechanism, and the UDMA > rate has no real meaning. > > And no, the card is not AHCI, it's Silicon Image's own interface, which > has most of the same features. (I'm not aware of any AHCI add-in cards, > though they may exist..) JMB363 cards. Cute little 2 port SATA + 1 PATA in a PCIEx1. Seems to be detected as AHCI. -- Len Sorensen -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
