[mythtv-users] SATA and DMA (SIIG 3112)

Calvin Harrigan charriglists at bellsouth.net
Fri Mar 31 22:10:14 UTC 2006


Preston Crow wrote:

>On Fri, 2006-03-31 at 15:26 -0600, leland sindt wrote:
>  
>
>> Two SD and one HD stream is a *lot*  of data, you may be hitting the real limit of the drive system.
>>
>>Yes, it is a lot of data... My orig plan was to use a SATA II controller 
>>(but didn't know at the it required pci-e at the time) 
>>
>>Hmmm... Anybody got numbers/experience with Hardware/Software Raid 0? Did it result in increased bandwidth? 
>>(Less likely with software, I know)
>>    
>>
>
>I don't think that's the problem.  I think it's the 3112 controller.
>
># lspci | grep SATA
>01:0b.0 RAID bus controller: Silicon Image, Inc. SiI 3112 [SATALink/SATARaid] Serial ATA Controller (rev 02)
>
>The 3112 controller is problematic, at least under Linux.  I'm not sure
>what the technical details are; it's either doing something to the PCI
>bus or issuing too many interrupts.  Anyway, I found that while hdparm
>reported double the performance on my SATA drive compared to my PATA
>drive, HDTV recordings on my SATA drive were full of errors, but
>recordings on my PATA drive were perfect.
>
>This is true of every kernel I've tried, including the new 2.6.16.
>
>I now record only to the PATA drive.  (And I'm looking for a PCI SATA
>controller with something other than the 3112 chip for a good price, as
>I don't want to upgrade my motherboard for a while.)
>
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>
>  
>
I have that controller running under 2.6.12.5  (Gentoo)  Not a single 
issue here.  Could it be implementation specific?

Calvin...


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