Jonathan Rawle wrote:
I happened to be looking in dmesg and noticed the following:
SCSI subsystem initialized libata version 1.02 loaded. ata_piix version 1.02 PCI: Setting latency timer of device 0000:00:1f.2 to 64 ata1: SATA max UDMA/133 cmd 0xC000 ctl 0xC402 bmdma 0xD000 irq 177 ata2: SATA max UDMA/133 cmd 0xC800 ctl 0xCC02 bmdma 0xD008 irq 177 ata1: dev 0 cfg 49:2f00 82:346b 83:7f01 84:4003 85:3c68 86:3e01 87:4003 88:20ff ata1: dev 0 ATA, max UDMA7, 234493056 sectors: lba48 ata1: dev 0 configured for UDMA/133
Does this mean that my SATA hard drive is operating at UDMA/133 rather than 150? Some sources say that UDMA7=UDMA/133, but some mention UDMA/150. Is there such thing as UDMA/150, or is UDMA7 one step up from UDMA/133?
Could this an issue of my SATA interface not being completely supported? It's the onboard controller on an 865PE motherboard.
Jonathan, I'm not sure about the controller itself, but don't forget a lot of hard drives are still not really native UDMA/150. A lot are still parallel hard disk drive interfaces 'converted' to a SATA interface. PATA is currently at a limit of UDMA/133, so that may be what you're seeing?
Regards, Ed.
