Rocco, Hi. Why all the focus on the disk drive side only? There's also a good chance that the sound card is not getting serviced and this causes the interruption. From my experience your drives have more than enough raw speed to record and playback a few channels of audio anyway, so I think that the disk drive is unlikely to be the issue here. Things to think about and look for: 1) Interrupts are not set up well a) Sound card has a bad one b) Some unimportant device, like a NIC, has a good one. 2) Some other application is stealing cycles a) autorun trying to play CDs automatically b) some other app started automatically Good luck, Mark -----Original Message----- From: linux-audio-user-admin@xxxxxxxxxxxxxxxxxx [mailto:linux-audio-user-admin@xxxxxxxxxxxxxxxxxx]On Behalf Of linuxmedia4@xxxxxxxxxxxx Sent: Tuesday, February 11, 2003 12:22 PM To: linux-audio-user@xxxxxxxxxxxxxxxxxx Subject: Re: [linux-audio-user] Interuptions While Recording > ...But even 30 MB/sec should be far enough to get > dropout-free recording. > 44100 * 16 * 2 (bit/sec) = 1411200 bit/s > 44100*16*2/8 = 176400 byte/s = around 200 kB/sec. > See? Even if you play at the same time (duplex), your > 30 MB/sec is far more than that. > One more thing, but be aware, I heard switching the > dma-transfer-rate might be dangerous > if you don't have the new 80pin cables. (right?) Yes, I definatly have the cables. > you might want to check. "hdparm -i" which gives you > some "*" on the options > that are set. see the "dma1 dma2 dma3 dma4 dma5" line, > which (in my case has the "*" at the dma4=100MB/secautomatically set.) Here's what doesn't make sense to me. The Web Site that you referred me to says: "Ultra DMA modes, such as UDMA2, 4, and 5, are also referred to as ATA/33, ATA/66, and ATA/100, respectively." Now, the term "respectivly" means that mode 5 refers to ATA/100. When I look at the output of "dmesg" I see the line: "SiS730 ATA 100 controller" And yet the output of "hdparm -i /dev/hda" lists" Model=Maxtor 6Y080P0, FwRev=YAR41VW0, SerialNo=Y30HJLPE Config={ Fixed } RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=57 BuffType=DualPortCache, BuffSize=7936kB, MaxMultSect=16, MultSect=16 CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=160086528 IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120} PIO modes: pio0 pio1 pio2 pio3 pio4 DMA modes: mdma0 mdma1 mdma2 UDMA modes: udma0 udma1 udma2 AdvancedPM=yes: disabled (255) WriteCache=enabled Drive conforms to: (null): 1 2 3 4 5 6 7 There's not even a listing for udma5. Since I keep reading all these warnings about not trying settings that aren't supported, should I try udma5? Just in case I missed something (and I've been reading everything can get my hands on for weeks now) here some info from my Mother Board Manual: The mainboard delivers high-level performance with support for... <SNIP> ... and two PCI Bus Master Ultra DMA (UDMA) ports that support up to four ATAPI devices. The PCI IDE also supports PIO Modes 3 and 4, UDMA33/66/100 IDE and an ATAPI CD-ROM And further into the Mother Board Manual it says: The built-in fast PCI IDE controller supports ATA Programmed Input/Output (PIO) and Direct Memory Access (DMA) mode. The Ultra DMA33/66/100 feature delivers data transfer rates up to 100 MB/s by providing a separate data path for two IDE channels and improving multi-tasking performance Thanks Rocco __________________________________________________________________ The NEW Netscape 7.0 browser is now available. Upgrade now! http://channels.netscape.com/ns/browsers/download.jsp Get your own FREE, personal Netscape Mail account today at http://webmail.netscape.com/
