Date: Mon, 09 Aug 2004 23:21:22 GMT From: Mark <admin@asarian-host.net> To: <freebsd-questions@freebsd.org> Subject: Re: Only WDMA2? Message-ID: <200408092321.I79NLLI7008696@asarian-host.net> References: <200408092106.I79L6HGV003922@asarian-host.net> <20040809231107.GA92068@xor.obsecurity.org>
next in thread | previous in thread | raw e-mail | index | archive | help
> > In my FreeBSD 4.9R server, I use an ARAID99 1000L RAID system. However, > > it only runs at "WDMA2": > > > > Aug 9 21:08:36 asarian-host /kernel: ad0: 39205MB <ASI ARAID99 1000 Rev > > 2.5> [79656/16/63] at ata0-master WDMA2 > > > WDMA2 only offers 16 MB/s, whereas ATA133 of course, offers 133 MB/s. The > > question is, is there a reason FreeBSD only uses WDMA2 for this device? > > (it contains two MAXTOR 40G ATA133 disks, connected to an ATA133 IDE port > > as single master). > > > > Second question, subsidiary, can I force a higher mode than WDMA2? (like > > UDMA 133). > > > > Much obliged, > > Check the cable..perhaps you only have a 40-pin cable instead of the > 80-pin cable you need for higher speeds. I used an 80-pin cable, alright; and I even switched it out; still, only WDMA2. I tried: "/sbin/atacontrol mode 0 UDMA6 XXX" But to no avail. A speed-test confirms the disasterous throughput: % dd if=/dev/ad0s1e of=/dev/null bs=64k count=100 100+0 records in 100+0 records out 6553600 bytes transferred in 0.638866 secs (10258177 bytes/sec) Something is fishy. - Mark
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200408092321.I79NLLI7008696>