I have a SanDisk Extreme III 2GB (at least I think it's III) in my Soekris net5501 :
[EMAIL PROTECTED] $ dd if=/dev/zero of=nulls bs=65536 count=1600 1600+0 records in 1600+0 records out 104857600 bytes transferred in 8.604 secs (12186647 bytes/sec) [EMAIL PROTECTED] $ dd if=nulls of=/dev/null bs=65536 1600+0 records in 1600+0 records out 104857600 bytes transferred in 9.118 secs (11499110 bytes/sec) [EMAIL PROTECTED] $ dmesg | grep SanDisk wd0 at pciide0 channel 0 drive 0: <SanDisk SDCFX3-2048> [EMAIL PROTECTED] $ uname -a OpenBSD tuna.zrh.weirdnet.ch 4.2 GENERIC#452 i386 [EMAIL PROTECTED] $ sysctl hw hw.machine=i386 hw.model=Geode(TM) Integrated Processor by AMD PCS ("AuthenticAMD" 586-class) hw.ncpu=1 ... It's pretty fast, especially considering it's CF on not the worlds fastest machine. Cheers, Paul 'WEiRD' de Weerd On Fri, Nov 16, 2007 at 04:02:32PM +0000, Christian Weisgerber wrote: | Stefan Klein <[EMAIL PROTECTED]> wrote: | | > If I use exactly the same commands / mount options as you I get less than | > 1MB/s.... | > | > I know that I cannot expect a "good" performance with the CF card, but 5MB/s | > would just be fine :-) | | I've started playing with a CF in a bigger machine, and the results | are rather disappointing. | | wd1 at pciide2 channel 0 drive 0: <TRANSCEND> | wd1: 1-sector PIO, LBA, 7775MB, 15924384 sectors | wd1(pciide2:0:0): using PIO mode 4, Ultra-DMA mode 4 | | This is a new "266x" CF. Write performance is in the 200..300 kB/s | range. It takes six hours or so to copy the OpenBSD CVS repository | on that drive. Sequential read performance tops out at about | 2300 kB/s. Random access read throughput--running CVS checkouts | in parallel, local and NFS--ends at ~1750 kB/s. | | Interestingly, the older and supposedly slower CF in my Soekris 5501 | | wd0 at pciide0 channel 0 drive 0: <SanDisk SDCFH-1024> | wd0: 4-sector PIO, LBA, 977MB, 2001888 sectors | wd0(pciide0:0:0): using PIO mode 4, DMA mode 2 | | reads sequentially at just short of 5 MB/s. | | I suspect the main performance factor to be the N-sector capability. | The Transcend generates an interrupt for each 512-byte sector (which | eats a ridiculous share of CPU on my Opteron box), the SanDisk a | fourth of that. | | IIRC, the SanDisk above is from their "Ultra II" line. I wonder | how the newer "Extreme III" and "Extreme IV" perform. | | -- | Christian "naddy" Weisgerber [EMAIL PROTECTED] | -- >++++++++[<++++++++++>-]<+++++++.>+++[<------>-]<.>+++[<+ +++++++++++>-]<.>++[<------------>-]<+.--------------.[-] http://www.weirdnet.nl/