I wonder if JMB363 can support really full bandwidth of SATA2 HDD?

Hi.

SouthBridge of My motherboard is ICH8.

ICH8 doesn't support AHCI.

So, my motherboard has JMB363 storage controller.

JMB363 is a single chip, one-lane PCI Express to two-port SATA2 and one-port PATA Host Controller.

I connect four of my HDDs(two SATA2 and two IDE HDDs) to JMB363.

Bandwidth of one-lane PCI Express is 2.5Gbs. But, bandwidth of SATA2 is 3Gbs.

Theoretically, Full bandwidth of my four HDDs is 3+3+0.66+0.66 = 7.32 Gbs.

Surely, four HDDs hardly have an opportunity for Full speed operation simultaneously.

But, I think that one-lane PCI Express cannot cover the bandwidth of four Hdds.

Furthermore, can JMB363 handle I/O requests of four HDDs simultaneously?

I want to know about this.

Thank you.