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List:       opensolaris-storage-discuss
Subject:    Re: [storage-discuss] sb700 sata controller issues
From:       ying tian - Sun Microsystems - Beijing China <Ying.Tian () Sun ! COM>
Date:       2008-06-25 5:28:36
Message-ID: 4861D784.4020103 () sun ! com
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F. Wessels wrote:

> Hi,
> 
> I've got a amd/ati sb700 sata/ide controller to which are connected an ide disk to \
> boot snv90 from and several sata disks for a zfs raidz pool. 
> If i put the controller in the bios in ide mode I can boot into 64 bit mode and \
> everything works. But the sata disks run in ide mode and are accessed one at a \
> time. The total bandwidth doesn't exceed that of a single drive. The getspeed \
> script shows that no drive is limiting. 
> If I but the controller in AHCI mode I can NOT boot in 64 bit mode. This is \
> described in bug 6665032 , all kinds of timeouts happen. But I can boot in 32 bit \
> mode and everything is fine, although I need run run ZTest and some other test. At \
> least all disks are used at the same time. But now I'm stuck in 32 bit and my other \
> apps don't run in 32 bit. The other workarounds suit me even less, less than 4gb \
> and no dma. (But I didn't try them) 
> I'm  aware of the doubtfull AHCI implementation in the sb600 and sb700. But the \
> sb700 runs fine under linux. It can do 64bit dma! The only issue remaining, Im \
> aware of, is the port multiplier support. But apart from that everything working \
> ok, under linux 2.6.25 with sufficient patches. 
> Perhaps everything is solved in snv93 which takes care of bug 6665032 , but that \
> specifically takes care of the sb600 which can't do 64 bit dma. 
> 
Hi Frederik,

Have you seen the packet timeout on your ATI SB700 with the 64-bit 
kernel mode? The current ahci driver only handled the 64-bit dma issue 
with ATI SB600.

Thanks!

> No action required, but I hope that the sb600 and sb700 will make it to the HCL. 
> 
> Frederik.
> 
> 
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