Optimize hard drive access performance

//** Steps for optimizing HARD DRIVE access performance is as follows **//:--

** Hdparm :--

 

      The following optimizations techniques can be applied to (E)IDE drives to utilize 32 bit I/O & DMA more effectively. 

 

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. Step 1 :--

**Get info: hdparm /dev/hda 

**Get more info: hdparm -I /dev/hda 

**Test Speed: hdparm -tT /dev/hda 

**Increase Speed: hdparm -d1 -c3 -u1 /dev/hda 

. Step 2 :--

-d1: Turn on DMA (0: off) 

-c3: IDE chipset support 

0: Disable 

1: Enable 

3: 32 bit transfer 

 

-u1: Get/set interrupt umask. Driver ignores other interrupts during processing of disk interrupts. (0: off) 

 

Test Speed Again: hdparm -tT /dev/hda 

 

The Red Hat 7.1+/8.0 configuration uses /etc/rc.sysinit to call scripts /etc/sysconfig/harddisks. 

(Earlier systems used: /etc/sysconfig/harddiskhda, /etc/sysconfig/harddiskhdb, etc) to run hdparm upon boot. 

 

File: /etc/sysconfig/harddisks: 

    USE_DMA=1

    EIDE_32BIT=1

**Note:- Turn off hdparm DMA access: hdparm -d0 /dev/hda 

Links: 

** hdparm man page. 

-Optimizing hard drive performance with hdparm. 

  (ATA, UDMA & hdparm)

 

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All Done.