/sbin/hdparm -c 3 -d 1 -m 16 -A1 /dev/hda
This means: '-c 3' enables 32 bit transfers with sync through the pci
bus, '-d 1' enables DMA operation, '-m 16' turns on multisector
transfers (with 16 sectors) and '-A1' enables the driver read ahead
feature.
On 6/2/05, Robert McRostie <[EMAIL PROTECTED]> wrote:
> Hello All,
> After a lot of work I have finally have my Mythtv box running. Thanks
> for all the great guides that are out there. Partically the one that was
> written by Jarod Wilson and Jani Talikka (for the Dvico HDTV digital card
> setup). I followed Jani Talikka's guide pretty closely to get my box running.
>
> One of the remaining problems that I have is the Live TV output is
> jerky. After searching the net I think this is related to me not being able
> to get the drives to use DMA. If I record anything the play back seems to be
> ok.
>
> So first up I will give a little info and see how we go.
>
> When I do a lspci -v command I get this:
> -------------------------------------------------------------------------
> 00:00.0 Host bridge: Silicon Integrated Systems [SiS] 661FX/M661FX/M661MX
> Host (rev 11)
> Subsystem: Silicon Integrated Systems [SiS] 661FX/M661FX/M661MX Host
> Flags: bus master, medium devsel, latency 32
> Memory at d8000000 (32-bit, non-prefetchable) [size=64M]
> Capabilities: [c0] AGP version 3.5
>
> 00:01.0 PCI bridge: Silicon Integrated Systems [SiS]: Unknown device 0003
> (prog-if 00 [Normal decode])
> Flags: bus master, 66Mhz, fast devsel, latency 64
> Bus: primary=00, secondary=01, subordinate=01, sec-latency=32
> Memory behind bridge: dc000000-ddffffff
> Prefetchable memory behind bridge: d0000000-d7ffffff
>
> 00:02.0 ISA bridge: Silicon Integrated Systems [SiS] SiS964 [MuTIOL Media IO]
> (rev 36)
> Flags: bus master, medium devsel, latency 0
>
> 00:02.5 IDE interface: Silicon Integrated Systems [SiS] 5513 [IDE] (rev 01)
> (prog-if 8a [Master SecP PriP])
> Subsystem: Giga-byte Technology: Unknown device 5002
> Flags: bus master, medium devsel, latency 128, IRQ 16
> I/O ports at <unassigned>
> I/O ports at <unassigned>
> I/O ports at <unassigned>
> I/O ports at <unassigned>
> I/O ports at f000 [size=16]
>
> 00:03.0 USB Controller: Silicon Integrated Systems [SiS] USB 1.0 Controller
> (rev 0f) (prog-if 10 [OHCI])
> Subsystem: Giga-byte Technology: Unknown device 5004
> Flags: bus master, medium devsel, latency 32, IRQ 20
> Memory at e1001000 (32-bit, non-prefetchable) [size=4K]
>
> 00:03.1 USB Controller: Silicon Integrated Systems [SiS] USB 1.0 Controller
> (rev 0f) (prog-if 10 [OHCI])
> Subsystem: Giga-byte Technology: Unknown device 5004
> Flags: bus master, medium devsel, latency 32, IRQ 21
> Memory at e1002000 (32-bit, non-prefetchable) [size=4K]
>
> 00:03.2 USB Controller: Silicon Integrated Systems [SiS] USB 1.0 Controller
> (rev 0f) (prog-if 10 [OHCI])
> Subsystem: Giga-byte Technology: Unknown device 5004
> Flags: bus master, medium devsel, latency 32, IRQ 22
> Memory at e1004000 (32-bit, non-prefetchable) [size=4K]
>
> 00:03.3 USB Controller: Silicon Integrated Systems [SiS] USB 2.0 Controller
> (prog-if 20 [EHCI])
> Subsystem: Giga-byte Technology: Unknown device 5004
> Flags: bus master, medium devsel, latency 32, IRQ 23
> Memory at e1000000 (32-bit, non-prefetchable) [size=4K]
> Capabilities: [50] Power Management version 2
>
> 00:09.0 Multimedia video controller: Conexant Winfast TV2000 XP (rev 05)
> Subsystem: DViCO Corporation: Unknown device db10
> Flags: bus master, medium devsel, latency 32, IRQ 17
> Memory at de000000 (32-bit, non-prefetchable) [size=16M]
> Capabilities: [44] Vital Product Data
> Capabilities: [4c] Power Management version 2
>
> 00:09.2 Multimedia controller: Conexant: Unknown device 8802 (rev 05)
> Subsystem: DViCO Corporation: Unknown device db10
> Flags: bus master, medium devsel, latency 32, IRQ 17
> Memory at df000000 (32-bit, non-prefetchable) [size=16M]
> Capabilities: [4c] Power Management version 2
>
> 00:0a.0 Ethernet controller: Realtek Semiconductor Co., Ltd.
> RTL-8139/8139C/8139C+ (rev 10)
> Subsystem: Realtek Semiconductor Co., Ltd. RT8139
> Flags: bus master, medium devsel, latency 32, IRQ 18
> I/O ports at e000 [size=256]
> Memory at e1003000 (32-bit, non-prefetchable) [size=256]
> Capabilities: [50] Power Management version 2
>
> 00:0b.0 Multimedia audio controller: Creative Labs Ectiva EV1938
> Subsystem: Creative Labs: Unknown device 5938
> Flags: bus master, slow devsel, latency 32, IRQ 19
> I/O ports at e400 [size=64]
> I/O ports at e800 [size=32]
> Capabilities: [dc] Power Management version 2
>
> 01:00.0 VGA compatible controller: nVidia Corporation NV34 [GeForce FX 5200]
> (rev a1) (prog-if 00 [VGA])
> Subsystem: LeadTek Research Inc.: Unknown device 290f
> Flags: bus master, 66Mhz, medium devsel, latency 248, IRQ 16
> Memory at dc000000 (32-bit, non-prefetchable) [size=16M]
> Memory at d0000000 (32-bit, prefetchable) [size=128M]
> Capabilities: [60] Power Management version 2
> Capabilities: [44] AGP version 3.0
>
> -------------------------------------------------------------------------
>
> When I us hdparm -v /dev/hd? I get this
>
> /dev/hda:
>
> Model=IC35L040AVVN07-0, FwRev=VA2OAF0C, SerialNo=VNP210B2GTKD0B
> Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
> RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=52
> BuffType=DualPortCache, BuffSize=1863kB, MaxMultSect=16, MultSect=16
> CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=80416127
> IORDY=on/off, tPIO={min:240,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: ATA/ATAPI-5 T13 1321D revision 1:
>
> * signifies the current active mode
>
>
> /dev/hdb:
>
> Model=CB511D ATAPI COMBO, FwRev=VER 13SA, SerialNo=
> Config={ Fixed Removeable DTR<=5Mbs DTR>10Mbs nonMagnetic }
> RawCHS=0/0/0, TrkSize=0, SectSize=0, ECCbytes=0
> BuffType=unknown, BuffSize=0kB, MaxMultSect=0
> (maybe): CurCHS=0/0/0, CurSects=0, LBA=yes, LBAsects=0
> IORDY=yes, tPIO={min:227,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=no
>
> * signifies the current active mode
>
>
> /dev/hdc:
>
> Model=WDC WD1600JB-00GVA0, FwRev=08.02D08, SerialNo=WD-WCAL92351843
> Config={ HardSect NotMFM HdSw>15uSec SpinMotCtl Fixed DTR>5Mbs FmtGapReq }
> RawCHS=16383/16/63, TrkSize=57600, SectSize=600, ECCbytes=74
> BuffType=DualPortCache, BuffSize=8192kB, MaxMultSect=16, MultSect=16
> CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=268435455
> 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 udma3 udma4 *udma5
> AdvancedPM=no WriteCache=enabled
> Drive conforms to: device does not report version:
>
> * signifies the current active mode
> -------------------------------------------------------------------------
>
> And also this
>
>
> /dev/hda:
> multcount = 16 (on)
> IO_support = 0 (default 16-bit)
> unmaskirq = 0 (off)
> using_dma = 0 (off)
> keepsettings = 0 (off)
> readonly = 0 (off)
> readahead = 256 (on)
> geometry = 65535/16/63, sectors = 41173057024, start = 0
>
> /dev/hdb:
> IO_support = 0 (default 16-bit)
> unmaskirq = 0 (off)
> using_dma = 0 (off)
> keepsettings = 0 (off)
> readonly = 0 (off)
> readahead = 256 (on)
>
> /dev/hdc:
> multcount = 16 (on)
> IO_support = 0 (default 16-bit)
> unmaskirq = 0 (off)
> using_dma = 0 (off)
> keepsettings = 0 (off)
> readonly = 0 (off)
> readahead = 256 (on)
> geometry = 19457/255/63, sectors = 160040803840, start = 0
>
> -------------------------------------------------------------------------
>
> As can be seen I do not have DMA enabled. But I think UDMA is enabled??? I
> know from reading all the stuff on mythtv that DMA is needed for mythtv to
> work well. After searching for this on the internet I found the command
> hdparm -d1 /dev/hd? Which should enable dma access. But this does not work. I
> get an error stating
>
> HID0_SET_DMA failed: Operation not permitted
>
> I am running the command as root.
>
> -------------------------------------------------------------------------
>
> I also ran hdparm -tT /dev/hd? And I get this
>
>
> /dev/hda:
> Timing cached reads: 1852 MB in 2.00 seconds = 924.29 MB/sec
> Timing buffered disk reads: 8 MB in 3.36 seconds = 2.38 MB/sec
>
> /dev/hdb:
> Timing buffered disk reads:
> /dev/hdc:
> Timing cached reads: 1840 MB in 2.00 seconds = 920.14 MB/sec
> Timing buffered disk reads: 8 MB in 3.18 seconds = 2.51 MB/sec
>
> Again from reading on the net the buffered disk reads are bad. Is this
> correct?
>
>
> Anyway, I have recompiled the Kernel (which is 2.6.9 do to the custom driver
> for the DVICO card) to support the IDE controller and this did not make any
> difference. I am using a Gigabit mother board model GA-8S661FXM-775 with a p4
> on it. A pretty quick machine for this task.
>
> So any suggestions on what to try next?
>
> Thanks in advance for any help.
>
> Regards,
> Robert McRostie.
>
>
> _______________________________________________
> mythtv-users mailing list
> [email protected]
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>
>
>
_______________________________________________
mythtv-users mailing list
[email protected]
http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
