Topic: hdparm -keepsettings over reboot

[mbachmann]

Raid 1 running, want to make hdparm 32 bit access mode permanent.

Issued:

Code: [Select]

hdparm -k 1 -K 1 /dev/hda
hdparm -k 1 -K 1 /dev/hdc
hdparm -c 1 /dev/hda
hdparm -c 1 /dev/hdc
Result:

Code: [Select]

hdparm /dev/hda
hdparm /dev/hdc
I/O support  =  1 (32-bit)
...
using_dma    =  1 (on)
keepsettings =  1 (on)
...
After reboot it does not keep settings:

Code: [Select]

hdparm /dev/hda
hdparm /dev/hdc
I/O support  =  0 (16-bit)

Howto keep 32 bit access mode over reboot?

[byte]

Not really a SME question    but anyhow...The drives get reinitialised by the BIOS and by Linux on each boot so you will need to set hdparm each time...

Maybe a script is the way to go or just place in the rc.local

[duncan]

Or /etc/sysconfig/harddisks

[mbachmann]

Thx to both, good old script solved it. Was just so square-headed that i thought keepsettings must keep the settings.

[jcoleman]

Take a look at this....

http://mirror.contribs.org/smeserver/contribs/dmay/mitel/howto/hdparm-howto.html

-jeff

[mbachmann]

Right, jcoleman - 32 bit access mode was already enabled, it just did not kept the settings over reboot.

[CharlieBrady]

Take a look at this....

http://mirror.contribs.org/smeserver/contribs/dmay/mitel/howto/hdparm-howto.html

-jeff

That HOWTO is obsolete. /etc/sysconfig/harddisks or /etc/sysconfig/harddiskhda etc is the way to do it now.

[mbachmann]

Just adding in /etc/sysconfig/harddisks

EXTRA_PARAMS=
-c 1

will provide keeping 32 bit I/O access over reboot.

[kruhm]

There doesn't seem to be to much documentation on this or maybe i'm looking in the wrong place.
Why would you use:

EXTRA_PARAMS= -c 1

instead of the line that is already there:

EIDE_32BIT=3

Or maybe it doesn't matter since it seems like they would both do the same thing.