Dear Sir,
I followed this command to check if dma is on or off?
sudo hdparm -d /dev/sda ENTER
OUTPUT:
HDIO_GET_DMA failed : Inappropriate ioctl for device
if above mentioned message comes, so then what to do …?
How to enable DMA Mode ON?
Please do help Sir, without making delay
Thanking you,
Warm Regards,
Basavaraj From India,
Hi Basavaraj,
Your error:
[B]HDIO_GET_DMA failed : Inappropriate ioctl for device
[/B]
does not necessarily signifies that the DMA of you block device is off/disabled. Use
hdparm -i /dev/sda
to see what type of DMA or UDMA is enabled. Example:
hdparm -i /dev/sda
/dev/sda:
Model=SAMSUNG HD501LJ, FwRev=CR100-10, SerialNo=S0MUJ1MP723425
Config={ Fixed }
RawCHS=16383/16/63, TrkSize=34902, SectSize=554, ECCbytes=4
BuffType=DualPortCache, BuffSize=16384kB, MaxMultSect=16, MultSect=16
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=976773168
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 *udma6
AdvancedPM=no WriteCache=enabled
Drive conforms to: unknown: ATA/ATAPI-3,4,5,6,7
* signifies the current active mode
Check for “*” to see what type of DMA is enabled. In the example above the block device /dev/sda has Ultra-DMA 6 mod enabled. ( *udma6 )
Furthermore, your command ‘hdparm -d /dev/sda’ is incorrect. The general block device naming convention uses /dev/sdx for SCSI devices and hdparm’s -d option can be used only for old IDE drives. ( see hdparm man page ). This will also explain your error message !
Hope it helps
Lubos
Dear Sir,
I did run the following command…
sudo hdparm -i /dev/sda ----------- Pressed Enter Button
Computer has given the Following OUTPUT…
UDMA modes: udma0 udma1 udma2 udma3 udma4 udma5 *udma6
In my Computer, Ultra-DMA 6 mode is enbled
Thanking you for giving me reply in Detailed manner. Your reply is very understanble.
Heartily Once again thankful to you Sir,
Warm Regards,
Basavaraj From India,