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Mon Oct 30 22:48:16 UTC 2006
Thanks,
Mitchell
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Hi,<br><br>I am trying to enable DMA on my HD Myth box to increase performance. It works fine not but I have read so much about how DMA increases performance so i figured I would give it a shot...<br><br>Here is my system config
<br>Chipset - SiS<br>Western Digital HDD 500GB SATA<br><br>Heres some term output...<br><br>[root at Mitchell_mc myth]# /sbin/hdparm /dev/sda<br><br>/dev/sda:<br> IO_support = 0 (default 16-bit)<br> readonly = 0 (off)
<br> readahead = 256 (on)<br> geometry = 60801/255/63, sectors = 976773168, start = 0<br>(I take it that DMA is not ON)<br><br>Trying to enable it....<br>[root at Mitchell_mc myth]# echo "/sbin/hdparm -d1 /dev/hda" >> /etc/rc.d/rc.local
<br><br>Still not working...<br>[root at Mitchell_mc myth]# /sbin/hdparm /dev/sda<br><br>/dev/sda:<br> IO_support = 0 (default 16-bit)<br> readonly = 0 (off)<br> readahead = 256 (on)<br> geometry = 60801/255/63, sectors = 976773168, start = 0
<br><br>Thinking maybe i need to reboot for it to take effect but it gives me the same thing. <br><br>Trying to get more info on if my drive does DMA...<br>[root at Mitchell_mc myth]# /sbin/hdparm -I /dev/sda <br><br>/dev/sda:
<br><br>ATA device, with non-removable media<br> Model Number: WDC WD5000KS-60MNB0 <br> Serial Number: WD-WCANXXXXXXXX<br> Firmware Revision: 08.02E08<br>Standards:<br>
Supported: 7 6 5 4 <br> Likely used: 7<br>Configuration:<br> Logical max current<br> cylinders 16383 16383<br> heads 16 16<br> sectors/track 63 63
<br> --<br> CHS current addressable sectors: 16514064<br> LBA user addressable sectors: 268435455<br> LBA48 user addressable sectors: 976773168<br> device size with M = 1024*1024: 476940 MBytes
<br> device size with M = 1000*1000: 500107 MBytes (500 GB)<br>Capabilities:<br> LBA, IORDY(can be disabled)<br> Queue depth: 32<br> Standby timer values: spec'd by Standard, with device specific minimum
<br> R/W multiple sector transfer: Max = 16 Current = 16<br> DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 *udma5 <br> Cycle time: min=120ns recommended=120ns<br> PIO: pio0 pio1 pio2 pio3 pio4
<br> Cycle time: no flow control=120ns IORDY flow control=120ns<br>Commands/features:<br> Enabled Supported:<br> * SMART feature set<br> * Power Management feature set<br> * Write cache
<br> * Look-ahead<br> * WRITE_BUFFER command<br> * READ_BUFFER command<br> * NOP cmd<br> * DOWNLOAD_MICROCODE<br> Power-Up In Standby feature set
<br> * SET_FEATURES required to spinup after power up<br> * 48-bit Address feature set<br> * Device Configuration Overlay feature set<br> * Mandatory FLUSH_CACHE<br> * FLUSH_CACHE_EXT
<br> * SMART error logging<br> * SMART self-test<br> * General Purpose Logging feature set<br> * WRITE_{DMA|MULTIPLE}_FUA_EXT<br> * SATA-I signaling speed (
1.5Gb/s)<br> * SATA-II signaling speed (3.0Gb/s)<br> * Native Command Queueing (NCQ)<br> * Phy event counters<br> DMA Setup Auto-Activate optimization<br> Device-initiated interface power management
<br> * Software settings preservation<br>Security: <br> Master password revision code = XXXX4<br> 146min for SECURITY ERASE UNIT. <br>Checksum: correct<br>[root at Mitchell_mc myth]# <br><br>From what i can tell it does. So what am i doing wrong?
<br><br>Thanks,<br>Mitchell<br><br>
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