Arch Linux

Falcata

Member

From: Michiana

Registered: 2008-01-23

Posts: 501

Website

Hard Drive IO Support running in 16bit Mode

I found this old article (http://www.linuxdevcenter.com/pub/a/lin … dparm.html) while googling for ways to speed up linux, and it came out on top.  I found that my hard disk was set in 16bit Mode, which meant it wasn't running as fast as it should, so I tried setting it to 32bit Mode, and it didn't work:

/dev/sda:
 setting 32-bit IO_support flag to 3
 HDIO_SET_32BIT failed: Invalid argument
 IO_support    =  0 (default 16-bit)

How do I get it set to 32-bit mode now?

BTW: In case it helps at all, here's the results of hdparm -Tt /dev/sda and hdparm /dev/sda:

/dev/sda:
 Timing cached reads:   1794 MB in  2.00 seconds = 897.33 MB/sec
 Timing buffered disk reads:  174 MB in  3.01 seconds =  57.75 MB/sec

/dev/sda:
 IO_support    =  0 (default 16-bit)
 readonly      =  0 (off)
 readahead     = 256 (on)
 geometry      = 9726/255/63, sectors = 156250000, start = 0

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Lord of Maelstrom

brebs

Member

Registered: 2007-04-03

Posts: 3,742

Re: Hard Drive IO Support running in 16bit Mode

If your drive is SATA, then remember that IDE <> SATA. The article you refer to was written before SATA was even invented.