Ian's blog » blacklist http://www.imacdonald.co.uk The Home of Ian Macdonald Mon, 31 May 2010 16:28:24 +0000 en hourly 1 http://wordpress.org/?v=3.2 Sometimes you got to hate linux http://www.imacdonald.co.uk/2008/08/01/sometimes-you-got-ot-hate-linux/ http://www.imacdonald.co.uk/2008/08/01/sometimes-you-got-ot-hate-linux/#comments Fri, 01 Aug 2008 17:23:40 +0000 Ian http://www.imacdonald.co.uk/?p=624 The boot drive on my file server has been really slow, hdparm was returning some really low numbers and CPU was spiking, which i wasn’t expecting on my new hardware. I decided this morning to do some google searches.

Here is the original hdparm results

sudo hdparm -t /dev/sdf
/dev/sdf:
Timing buffered disk reads: 4 MB in 3.56 seconds = 1.12 MB/sec

Then i added the following in /etc/modprobe.d/blacklist

blacklist ata_generic

and in /etc/initramfs-tools/modules added

pata_atiixp
blacklist ata_generic

rebuilt the initramfs

sudo update-initramfs -u -v

rebooted and now I get

sudo hdparm -t /dev/sdf
/dev/sdf:
Timing buffered disk reads: 220 MB in 3.02 seconds = 72.83 MB/sec

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