Hdparm: Difference between revisions

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Latest revision as of 20:32, 25 July 2005

hdparm is used in Linux for setting harddisk options.

To view current settings, simply run: hdparm /dev/hda (or /hdb, /hdc, etc.)

-c1 enables 32-bit I/O

-d1 enables DMA

-X66 enables ATA/33

Red Hat uses /etc/rc.sysinit to call scripts /etc/sysconfig/harddiskhda, /etc/sysconfig/harddiskhdb, etc. to run hdparm upon boot.

File: /etc/sysconfig/harddiskhda:

USE_DMA=1

EIDE_32BIT=1

To enable DMA during boot, add the following line to your lilo.conf file:

append = "ide0=dma"

@@ Line 4: / Line 4: @@
 -c1 enables 32-bit I/O
 -d1 enables DMA
 -X66 enables ATA/33
+{|
-PIO mode 	Switch 	Burst Rate
+| PIO mode || Switch ||	Burst Rate
-	-X08 	3.3MB/sec
+|-
-	-X09 	5.2MB/sec
-	-X10 	8.3MB/sec
+|0         ||-X08 || 	3.3MB/sec
+|-
-	-X11 	11.1MB/sec
-	-X12 	16.7MB/sec
+|1         ||-X09 ||	5.2MB/sec
+|-
+|2         ||-X10 ||	8.3MB/sec
+|-
+|3         ||-X11 ||	11.1MB/sec
+|-
+|4         ||-X12 ||	16.7MB/sec
+|}
-MW DMA mode 	Switch 	Burst Rate
-	-X32 	4.2MB/sec
-	-X33 	13.3MB/sec
-	-X34 	16.6MB/sec
+{|
-UDMA mode 	Switch 	Burst Rate
+|MW DMA mode || Switch || Burst Rate
-(ATA/33) 	-X66 	33MB/sec
+|-
-(ATA/66) 	-X68 	66MB/sec
-(ATA/100) 	-X69 	100MB/sec
+|0           ||	-X32 ||  4.2MB/sec
+|-
+|1           ||	-X33 || 13.3MB/sec
+|-
+|2           ||	-X34 || 16.6MB/sec
+|}
+{|
+|UDMA mode ||	Switch || Burst Rate
+|-
+|2 (ATA/33) ||	-X66 ||	33MB/sec
+|-
+|4 (ATA/66) ||	-X68 ||	66MB/sec
+|-
+|5 (ATA/100) || -X69 ||	100MB/sec
+|}
 [[Red Hat]] uses /etc/rc.sysinit to call scripts /etc/sysconfig/harddiskhda, /etc/sysconfig/harddiskhdb, etc. to run hdparm upon boot.
@@ Line 42: / Line 61: @@
 * http://support.intel.com/support/graphics/sb/CS-010515.htm
+[[Category:Linux]]
+[[Category:Hardware]]