Syntic wrote:
> Hi there,
>
> I recently installed OpenBSD on one of my servers and I have noticed that I
> am experiencing slow SATA write speeds when using SMB to copy files across
> my network.
>
> I currently have 1xSATA disk & 2xPATA disks in my server.
> When I copy files across my network (GigE) to my PATA disk, I am seeing
> approx 600Mbps, however when I copy to the SATA disk I only see approx
> 125Mbps.
> I also noticed that the CPU utilization (for SMBd) is at about 90% when
> copying to the SATA disk, but only hovers around 10% when copying the PATA
> disk.
> I thought this may have been a driver issue with SATA, therefore causing the
> increased CPU when copying. But I copied some files across to the same SATA
> disk using FTP instead and the CPU stayed quite low and the write speeds
> were approx 600Mbps.
>
> Does anybody have any ideas what may be causing the issues?
>
> I have provided some info from dmesg below which may be of use.
sata disks normally (if not always) show up as sd's. You have 3 wd's.
That makes me confused and lead to believe you might be running a very
old OpenBSD version, something I cannot conclude from the partial dmesg
you included. Since you obviously have some issues you do not know how
to handle,
ALWAYS INCLUDE THE ENTIRE DMESG
and do not make any assumptions of what would be necessary or not.
Cheers,
Alexander
>
> cpu0: Intel(R) Core(TM)2 Duo CPU E7200 @ 2.53GHz ("GenuineIntel" 686-class)
> 2.54 GHz
> bios0 at mainbus0: AT/286+ BIOS, date 09/02/08, BIOS32 rev. 0 @ 0xf1df0,
> SMBIOS rev. 2.5 @ 0xf0000 (50 entries)
> bios0: vendor Phoenix Technologies, LTD version "ASUS P5N-EM HDMI ACPI BIOS
> Revision 0401" date 09/02/2008
> bios0: ASUSTeK Computer INC. P5N-EM HDMI
> spdmem0 at iic0 addr 0x50: 1GB DDR2 SDRAM non-parity PC2-6400CL5
> spdmem1 at iic0 addr 0x52: 1GB DDR2 SDRAM non-parity PC2-6400CL5
> pciide0 at pci0 dev 8 function 0 "NVIDIA MCP73 IDE" rev 0xa1: DMA, channel 0
> configured to compatibility, channel 1 configured to compatibility
> pciide1 at pci0 dev 14 function 0 "NVIDIA MCP73 AHCI" rev 0xa2: DMA
> (unsupported), channel 0 wired to native-PCI, channel 1 wired to native-PCI
> wd0 at pciide0 channel 0 drive 0: <ST3320620A>
> wd0: 16-sector PIO, LBA48, 305245MB, 625142448 sectors
> wd1 at pciide0 channel 0 drive 1: <ST3750640A>
> wd1: 16-sector PIO, LBA48, 715404MB, 1465149168 sectors
> wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 5
> wd1(pciide0:0:1): using PIO mode 4, Ultra-DMA mode 5
> wd2 at pciide1 channel 0 drive 0: <ST31500341AS>
> wd2: 16-sector PIO, LBA48, 1430799MB, 2930277168 sectors
>
> Thanks,
> Kristian
