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figo
n00b
Joined: 20 Sep 2008
Posts: 49
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 Posted: Tue Sep 23, 2008 3:09 am Post subject: Why i canot enable the hard driver DMA ? |
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hi, i install gentoo 2008.0, now i want to enable the hard driver DMA by "hdparm -d 1 /dev/hda" but:
| Code: | localhost figo # hdparm -d 1 /dev/hda
/dev/hda:
setting using_dma to 1 (on)
HDIO_SET_DMA failed: Operation not permitted
using_dma = 0 (off)
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why i canot enable DMA?
my hard driver information:
| Code: | localhost figo # lspci | grep -i ide
00:1f.2 IDE interface: Intel Corporation 82801GBM/GHM (ICH7 Family) SATA IDE Controller (rev 01)
localhost figo # hdparm -I /dev/hda
/dev/hda:
ATA device, with non-removable media
Model Number: Hitachi HTS541680J9SA00
Serial Number: SB2204SGDMG9VE
Firmware Revision: SB2OC7BP
Standards:
Used: ATA/ATAPI-7 T13 1532D revision 1
Supported: 7 6 5 4
Configuration:
Logical max current
cylinders 16383 16383
heads 16 16
sectors/track 63 63
--
CHS current addressable sectors: 16514064
LBA user addressable sectors: 156301488
LBA48 user addressable sectors: 156301488
device size with M = 1024*1024: 76319 MBytes
device size with M = 1000*1000: 80026 MBytes (80 GB)
Capabilities:
LBA, IORDY(can be disabled)
Standby timer values: spec'd by Vendor, no device specific minimum
R/W multiple sector transfer: Max = 16 Current = 16
Advanced power management level: 128
DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 *udma5
Cycle time: min=120ns recommended=120ns
PIO: pio0 pio1 pio2 pio3 pio4
Cycle time: no flow control=120ns IORDY flow control=120ns |
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notHerbert
Advocate
Joined: 11 Mar 2008
Posts: 2228
Location: 45N 73W
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| Posted: Tue Sep 23, 2008 3:25 am Post subject: |
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You have dma enabled  |
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figo
n00b
Joined: 20 Sep 2008
Posts: 49
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| Posted: Tue Sep 23, 2008 3:30 am Post subject: |
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no, it seem to using PIO mode:
| Code: | localhost figo # hdparm -cuda /dev/hda
/dev/hda:
IO_support = 0 (default)
unmaskirq = 0 (off)
using_dma = 0 (off)
readahead = 256 (on) |
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figo
n00b
Joined: 20 Sep 2008
Posts: 49
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| Posted: Tue Sep 23, 2008 3:31 am Post subject: |
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and the speed is very slow:
| Code: | localhost figo # hdparm -tT /dev/hda
/dev/hda:
Timing cached reads: 866 MB in 2.00 seconds = 433.08 MB/sec
Timing buffered disk reads: 6 MB in 3.23 seconds = 1.86 MB/sec
localhost figo #
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eccerr0r
Watchman
Joined: 01 Jul 2004
Posts: 9911
Location: almost Mile High in the USA
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| Posted: Tue Sep 23, 2008 2:56 pm Post subject: |
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Is this using the 2008.0 boot cd or a kernel you built?
I'd be surprised if the cd has the issue, so assuming the latter - did you enable DMA support for the ICH* IDE driver?
_________________
Intel Core i7 2700K/Radeon R7 250/24GB DDR3/256GB SSD
What am I supposed watching? |
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figo
n00b
Joined: 20 Sep 2008
Posts: 49
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| Posted: Tue Sep 23, 2008 4:29 pm Post subject: |
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| YES,I install with 2008.0 minial Livecd, so i dont know how to config the hard driver, would you like to help me? |
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pappy_mcfae
Watchman
Joined: 27 Dec 2007
Posts: 5999
Location: Pomona, California.
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| Posted: Tue Sep 23, 2008 5:53 pm Post subject: |
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You give very little info on which to go. Post the results of lspci -n cat /proc/cpuinfo and emerge --info, as well as your /etc/fstab file, and I'll see what I can see.
Blessed be!
Pappy
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Sysa
Apprentice
Joined: 16 Mar 2005
Posts: 161
Location: Europe
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| Posted: Tue Sep 23, 2008 6:06 pm Post subject: |
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| figo wrote: | no, it seem to using PIO mode:
| Code: | localhost figo # hdparm -cuda /dev/hda
/dev/hda:
IO_support = 0 (default)
unmaskirq = 0 (off)
using_dma = 0 (off)
readahead = 256 (on) |
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Public | Code: | hdparm -v /dev/hda
hdparm -i /dev/hda |
and | Code: | | grep DMA <your kernel config> |
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RedHat -> SuSE -> Debian -> Gentoo |
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NeddySeagoon
Administrator
Joined: 05 Jul 2003
Posts: 54924
Location: 56N 3W
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| Posted: Tue Sep 23, 2008 7:07 pm Post subject: |
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figo,
You are using the old IDE kernel branch for your IDE drives and have either an option missing or an option too many.
Either can prevent you setting DMA on.
Configure your kernel like this and move to the new libata kernel drivers.
Beware the changes to grub.conf and /etc/fstab
_________________
Regards,
NeddySeagoon
Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail. |
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figo
n00b
Joined: 20 Sep 2008
Posts: 49
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| Posted: Tue Sep 23, 2008 11:04 pm Post subject: |
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hi all,
i have reconfig the kernel and add scsi and sata driver for the kernel, and motify the grub.conf and fstab , "/dev/hda" to "/dev/sda", so it can run:
| Code: | localhost figo # hdparm -tT /dev/sda
/dev/sda:
Timing cached reads: 1776 MB in 2.00 seconds = 888.65 MB/sec
Timing buffered disk reads: 146 MB in 3.03 seconds = 48.13 MB/sec
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thank you |
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