Re: ABIT BP6, UDMA-66 and wdc AC310200
> > It seems Arun Sharma wrote: > > > Do you have the prober 80pin cable ?? if so please provide a verbose boot... > > > > Thanks, that fixed the problem. Has anyone benchmarked the driver ? A very > > unscientific benchmark that I ran didn't seem to produce much of a difference > > between UDMA33 and UDMA66. In both cases, I got roughly 13 MB/s. > > There are almost no mesureable difference between UDMA33 and UDMA66, all > mesurements I've done (and have read about) sees little if no difference, > in fact some drives can be faster under UDMA33 even if they support the > higher rate too. > > > # dd if=/dev/ad4s2 of=/dev/null bs=40960k count=10 > > 10+0 records in > > 10+0 records out > > 419430400 bytes transferred in 30.797045 secs (13619177 bytes/sec) > > Thats probably close to what your drive can pull of the platters... > I get 22-23MB/sec off an IBM DPTA drive here with < 1% cpu usage, > so the driver is not the problem.. Look at your drive specs. I have one drive (Maxtor) with specs that say ~34MB to/from media and 66MB to/from interface (bus). Another piece of the puzzle is the amount of drive cache buffer. Again, I've seen between 512KB and 2MB. Mileage will vary... [It's the old 'burst rate of X' where the following 378 conditions must be met to reach the burst level...] > I have a config with 7 disks online, giving me a raw throughput > of ~100MB/s sustained, that is about the limit of what can be done > over the PCI bus... > > -Søren > > > To Unsubscribe: send mail to [EMAIL PROTECTED] > with "unsubscribe freebsd-current" in the body of the message > -- Joseph Thomas E/Mail: [EMAIL PROTECTED] Network Computing Services, Inc. [EMAIL PROTECTED] 1200 Washington Ave So. Tel: +1 612 337 3558 Minneapolis, MN 55415-1227 FAX: +1 612 337 3400 An elephant is a mouse with an operating system. To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
Re: ABIT BP6, UDMA-66 and wdc AC310200
It seems Arun Sharma wrote: > > Do you have the prober 80pin cable ?? if so please provide a verbose boot... > > Thanks, that fixed the problem. Has anyone benchmarked the driver ? A very > unscientific benchmark that I ran didn't seem to produce much of a difference > between UDMA33 and UDMA66. In both cases, I got roughly 13 MB/s. There are almost no mesureable difference between UDMA33 and UDMA66, all mesurements I've done (and have read about) sees little if no difference, in fact some drives can be faster under UDMA33 even if they support the higher rate too. > # dd if=/dev/ad4s2 of=/dev/null bs=40960k count=10 > 10+0 records in > 10+0 records out > 419430400 bytes transferred in 30.797045 secs (13619177 bytes/sec) Thats probably close to what your drive can pull of the platters... I get 22-23MB/sec off an IBM DPTA drive here with < 1% cpu usage, so the driver is not the problem.. I have a config with 7 disks online, giving me a raw throughput of ~100MB/s sustained, that is about the limit of what can be done over the PCI bus... -Søren To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
Re: ABIT BP6, UDMA-66 and wdc AC310200
On Tue, Feb 22, 2000 at 11:54:40AM +0100, Soren Schmidt wrote: > It seems Arun Sharma wrote: > > I have the above hardware combination and here's the dmesg from > > 4.0-current: > > > > atapci0: port 0xf000-0xf00f at device 7.1 on pci0 > > atapci1: port >0xb400-0xb4ff,0xb000-0xb003,0xac00-0xac07 irq 11 at device 19.0 on pci0 > > ata2: at 0xac00 on atapci1 > > atapci2: port >0xc000-0xc0ff,0xbc00-0xbc03,0xb800-0xb807 irq 11 at device 19.1 on pci0 > > ad4: 9787MB [19885/16/63] at ata2-master using UDMA33 > > > > How do I get my disk to work in UDMA66 mode ? Is it supported with for > > my disk ? > > > Do you have the prober 80pin cable ?? if so please provide a verbose boot... Thanks, that fixed the problem. Has anyone benchmarked the driver ? A very unscientific benchmark that I ran didn't seem to produce much of a difference between UDMA33 and UDMA66. In both cases, I got roughly 13 MB/s. # dd if=/dev/ad4s2 of=/dev/null bs=40960k count=10 10+0 records in 10+0 records out 419430400 bytes transferred in 30.797045 secs (13619177 bytes/sec) Can anyone point me to some benchmarks and comment about the improvement ? -Arun To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
Re: ABIT BP6, UDMA-66 and wdc AC310200
In <[EMAIL PROTECTED]> Arun Sharma <[EMAIL PROTECTED]> wrote: What kind of cable do yuo use ? Is it 80-wire one ? N.Dudorov > I have the above hardware combination and here's the dmesg from > 4.0-current: > > atapci0: port 0xf000-0xf00f at device 7.1 on pci0 > atapci1: port >0xb400-0xb4ff,0xb000-0xb003,0xac00-0xac07 irq 11 at device 19.0 on pci0 > ata2: at 0xac00 on atapci1 > atapci2: port >0xc000-0xc0ff,0xbc00-0xbc03,0xb800-0xb807 irq 11 at device 19.1 on pci0 > ad4: 9787MB [19885/16/63] at ata2-master using UDMA33 > > How do I get my disk to work in UDMA66 mode ? Is it supported with for > my disk ? > > http://www.westerndigital.com/service/FAQ/dtr.html lists my disk as > ATA-66. > > What am I doing wrong ? > > -Arun > > To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
Re: ABIT BP6, UDMA-66 and wdc AC310200
It seems Arun Sharma wrote: > I have the above hardware combination and here's the dmesg from > 4.0-current: > > atapci0: port 0xf000-0xf00f at device 7.1 on pci0 > atapci1: port >0xb400-0xb4ff,0xb000-0xb003,0xac00-0xac07 irq 11 at device 19.0 on pci0 > ata2: at 0xac00 on atapci1 > atapci2: port >0xc000-0xc0ff,0xbc00-0xbc03,0xb800-0xb807 irq 11 at device 19.1 on pci0 > ad4: 9787MB [19885/16/63] at ata2-master using UDMA33 > > How do I get my disk to work in UDMA66 mode ? Is it supported with for > my disk ? Do you have the prober 80pin cable ?? if so please provide a verbose boot... -Søren To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
ABIT BP6, UDMA-66 and wdc AC310200
I have the above hardware combination and here's the dmesg from 4.0-current: atapci0: port 0xf000-0xf00f at device 7.1 on pci0 atapci1: port 0xb400-0xb4ff,0xb000-0xb003,0xac00-0xac07 irq 11 at device 19.0 on pci0 ata2: at 0xac00 on atapci1 atapci2: port 0xc000-0xc0ff,0xbc00-0xbc03,0xb800-0xb807 irq 11 at device 19.1 on pci0 ad4: 9787MB [19885/16/63] at ata2-master using UDMA33 How do I get my disk to work in UDMA66 mode ? Is it supported with for my disk ? http://www.westerndigital.com/service/FAQ/dtr.html lists my disk as ATA-66. What am I doing wrong ? -Arun To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message
