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@xxxxxxxxx> 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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