NVIDIA Sata - Slow Disk (Second Try)

[Lonni J Friedman]

With a similar setup I'm seeing about 60MB/s for buffered disk reads
using sata_nv.  Why are you booting with the combined_mode=libata
option?  Does the performance change without that option?

Specifically what kind of SATA disk are you using?

On 4/9/07, Srikanth Konjarla <srikanth.konjarla at gmail.com> wrote:
> All,
>
> I am running FC6 (with latest update, 64-bit) on AMD Dual Core with 1GB
> RAM. It contains a SATA hard disk. I am experience sluggishness when
> files are opened or closed (saved). I suspect that i have slow SATA
> performance even though i am not sure. I have following stats.
>
> # hdparm -Tt /dev/sda
>
> /dev/sda:
>  Timing cached reads:   2452 MB in  2.00 seconds = 1226.48 MB/sec
>  Timing buffered disk reads:   86 MB in  3.03 seconds =  28.35 MB/sec
>
> I am concerned about 28.35 MB/Sec speed here.
>
> # hdparm -i /dev/sda
>
> /dev/sda:
>  HDIO_GET_IDENTITY failed: Inappropriate ioctl for device
>
> # dmesg | grep -i sata
> sata_nv 0000:00:0e.0: version 3.2
> ata1: SATA max UDMA/133 cmd 0xE800 ctl 0xE482 bmdma 0xE000 irq 21
> ata2: SATA max UDMA/133 cmd 0xE400 ctl 0xE082 bmdma 0xE008 irq 21
> scsi0 : sata_nv
> ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
> scsi1 : sata_nv
> ata2: SATA link down (SStatus 0 SControl 300)
>
> # lsmod | grep -i sata
> sata_nv                29509  4
> libata                120553  1 sata_nv
>
> Kernel Boot Parameter
> kernel /vmlinuz-2.6.20-1.2933.fc6 ro root=LABEL=/1 noquiet
> combined_mode=libata
>
> Any suggestions/recommendations/comments are welcome.
>
> Thanks
>
> Srikanth

-- 
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L. Friedman                                    netllama at gmail.com
LlamaLand                       http://netllama.linux-sxs.org