Messages in this thread | | | From | "Reverend EvvL X" <> | Subject | Re: UDMA(66) drive coming up as UDMA(33)? | Date | Tue, 10 Apr 2001 08:46:21 -0700 |
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I'm currently running a BP6 with a on board HPT366 and a 7200rpm drive. From what I've seen with my setup at home that 19.51 MB/s sounds just about right for a hdparm test. When the manual is refering to the "UDMA 4 66 Mb/s" their talking about the maximum burst rate for the ATA bus not the max transfer rate, someone please correct me if I'm worng.
-Eric Olinger
----- Original Message ----- From: "David St.Clair" <dstclair@cs.wcu.edu> To: <linux-kernel@vger.kernel.org> Sent: Monday, April 09, 2001 8:41 PM Subject: Re: UDMA(66) drive coming up as UDMA(33)?
> Well, I'm positive what I have is an 80pin cable. I may try a diffrent > one. I guess I could benchmark the drive in windows and see how it > compares to linux. (Both are on the same drive). The HPT366 chip is > integrated on the BE6 motherboard. > > The manual says PIO 4 mode should get about 16.6 Mb/s, UDMA 2 33 Mb/s, > and UDMA 4 66 Mb/s. Does anyone know what the correct numbers I should > be seeing in linux? (/w hdparm -t) > > Again, my hardware is: > > Quantum Fireball KA 13.6 7200 rpm HD > Abit BE6 /w integrated HPT366 chip > > Kernel 2.4.3 > > > Thanks, > > David St.Clair > > > > > On 09 Apr 2001 19:39:23 -0700, Nicholas Knight wrote: > > ----- Original Message ----- > > From: "David St.Clair" <dstclair@cs.wcu.edu> > > To: <linux-kernel@vger.kernel.org> > > Sent: Saturday, April 07, 2001 10:36 AM > > Subject: UDMA(66) drive coming up as UDMA(33)? > > > > > > > I'm trying to get my hard drive to use UDMA/66. I'm thinking the cable > > > is not being detected. When the HPT366 bios is set to UDMA 4; using > > > hdparm -t, I get a transfer rate of 19.51 MB/s. When the HPT366 bios is > > > set to PIO 4 the transfer rate is the same. Is this normal for a UDMA/66 > > > drive? What makes me think something is wrong is that the log says > > > > The speed is dependant on the drive, and has absilutely nothing to do with > > the UDMA mode, beyond that the controller and cable need to be able to > > support at least the speed the drive is recieving/outputting data in order > > for the drive to operate at full speed, 19.51MB/sec sounds right for a good > > 7200RPM HDD > > > > > > > > "ide2: BM-DMA at 0xbc00-0xbc07, BIOS settings: hde:pio" <-- PIO? > > > > hmm this is a little odd but I don't know the ins and outs of the HPT366 > > controller > > > > > > > > and > > > > > > "hde: 27067824 sectors (13859 MB) w/371KiB Cache, CHS=26853/16/63, > > > UDMA(33)" <--- UDMA(33)? shouldn't it be UDMA(66)? > > > > > > > this certainly sounds like it's not detecting the cable properly... have you > > tried replacing it with a new cable that you KNOW supports ATA/66? > > > > > > > HPT366: onboard version of chipset, pin1=1 pin2=2 > > > > is the HPT366 controller in an add-in card or built into the motherboard? it > > looks like it's builtin from this line > > > > the bottom line here is that the cable probably isn't being detected > > properly for some reason, I doubt if it's a kernel problem, the cable is > > probably "bad", try picking up a new ATA/66+ cable and putting it in there > > this shouldn't actually cause you problems unless you're often transferring > > more than 33MB/sec though, which isn't likely on a desktop system, ATA/66 > > and ATA/100 are *generaly* overkill for most desktop systems, even for many > > powerusers > > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/
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