[gentoo-user] Hard disk power save

[gentoo-user] Hard disk power save

[Danis Petkakis]

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hello there i would like to know if there is such a thing as a power saving
scheme as far as hard disks are
concerned...i would like my hard disks to spin down when they are not being
accessed after a defined
period of time...is that possible? any hints on how to do that would be
really appreciated...
thanks in advance...

Danis Petkakis

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[gentoo-user] Re: Hard disk power save

[Remy Blank]

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Danis Petkakis wrote:
> hello there i would like to know if there is such a thing as a power
> saving scheme as far as hard disks are
> concerned...i would like my hard disks to spin down when they are not
> being accessed after a defined
> period of time...is that possible? any hints on how to do that would be
> really appreciated...

If your disk is only rarely accessed (i.e. a secondary HD, not
containing the root filesystem), look at "hdparm", more specifically the
-S option.

If you would like to spin down your main HD (e.g. on a laptop), look at
app-laptop/laptop-mode-tools.

-- Remy


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Re: [gentoo-user] Re: Hard disk power save

[Danis Petkakis]

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2009/2/7 Remy Blank <remy.blank@pobox.com>

> Danis Petkakis wrote:
> > hello there i would like to know if there is such a thing as a power
> > saving scheme as far as hard disks are
> > concerned...i would like my hard disks to spin down when they are not
> > being accessed after a defined
> > period of time...is that possible? any hints on how to do that would be
> > really appreciated...
>
> If your disk is only rarely accessed (i.e. a secondary HD, not
> containing the root filesystem), look at "hdparm", more specifically the
> -S option.
>
> If you would like to spin down your main HD (e.g. on a laptop), look at
> app-laptop/laptop-mode-tools.
>
> -- Remy
>
>
does hdparm work on sata hard disks aswell? because i couldn't find such an
option
in sdparm

Danis

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Re: [gentoo-user] Re: Hard disk power save

[Dale]

Danis Petkakis wrote:
> 2009/2/7 Remy Blank <remy.blank@pobox.com <mailto:remy.blank@pobox.com>>
>
>     Danis Petkakis wrote:
>     > hello there i would like to know if there is such a thing as a power
>     > saving scheme as far as hard disks are
>     > concerned...i would like my hard disks to spin down when they
>     are not
>     > being accessed after a defined
>     > period of time...is that possible? any hints on how to do that
>     would be
>     > really appreciated...
>
>     If your disk is only rarely accessed (i.e. a secondary HD, not
>     containing the root filesystem), look at "hdparm", more
>     specifically the
>     -S option.
>
>     If you would like to spin down your main HD (e.g. on a laptop),
>     look at
>     app-laptop/laptop-mode-tools.
>
>     -- Remy
>
>
> does hdparm work on sata hard disks aswell? because i couldn't find
> such an option
> in sdparm
>
> Danis

From the man page, right at the top no less.  o_O

NAME
       hdparm - get/set SATA/IDE device parameters

It should work for SATA to.

Dale

:-)  :-) 

Re: [gentoo-user] Re: Hard disk power save

[Danis Petkakis]

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ok i tried 'hdparm -y /dev/sda' and though i can hear a little noise as if
the disk is in sleep
mode after a while (5 secs) it makes a noise as though it is spinning up
again...also
'hdparm -C /dev/sda' shows the disk active/idle...i also tried with 'hdparm
-S12 /dev/sda'
but couldn't tell whether it is working or not...how can i make sure it
actually works?

2009/2/7 Dale <rdalek1967@gmail.com>

> Danis Petkakis wrote:
> > 2009/2/7 Remy Blank <remy.blank@pobox.com <mailto:remy.blank@pobox.com>>
> >
> >     Danis Petkakis wrote:
> >     > hello there i would like to know if there is such a thing as a
> power
> >     > saving scheme as far as hard disks are
> >     > concerned...i would like my hard disks to spin down when they
> >     are not
> >     > being accessed after a defined
> >     > period of time...is that possible? any hints on how to do that
> >     would be
> >     > really appreciated...
> >
> >     If your disk is only rarely accessed (i.e. a secondary HD, not
> >     containing the root filesystem), look at "hdparm", more
> >     specifically the
> >     -S option.
> >
> >     If you would like to spin down your main HD (e.g. on a laptop),
> >     look at
> >     app-laptop/laptop-mode-tools.
> >
> >     -- Remy
> >
> >
> > does hdparm work on sata hard disks aswell? because i couldn't find
> > such an option
> > in sdparm
> >
> > Danis
>
> From the man page, right at the top no less.  o_O
>
> NAME
>       hdparm - get/set SATA/IDE device parameters
>
> It should work for SATA to.
>
> Dale
>
> :-)  :-)
>
>

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[gentoo-user] Re: Hard disk power save

[Nikos Chantziaras]

still mounted.
waking it up if it's
almost always something
put it too sleep. There's
umount it before you
Usually, you have to

Danis Petkakis wrote:
> ok i tried 'hdparm -y /dev/sda' and though i can hear a little noise as 
> if the disk is in sleep
> mode after a while (5 secs) it makes a noise as though it is spinning up 
> again...also
> 'hdparm -C /dev/sda' shows the disk active/idle...i also tried with 
> 'hdparm -S12 /dev/sda'
> but couldn't tell whether it is working or not...how can i make sure it 
> actually works?
> 
> 2009/2/7 Dale <rdalek1967@gmail.com <mailto:rdalek1967@gmail.com>>
> 
>     Danis Petkakis wrote:
>      > 2009/2/7 Remy Blank <remy.blank@pobox.com
>     <mailto:remy.blank@pobox.com> <mailto:remy.blank@pobox.com
>     <mailto:remy.blank@pobox.com>>>
>      >
>      >     Danis Petkakis wrote:
>      >     > hello there i would like to know if there is such a thing
>     as a power
>      >     > saving scheme as far as hard disks are
>      >     > concerned...i would like my hard disks to spin down when they
>      >     are not
>      >     > being accessed after a defined
>      >     > period of time...is that possible? any hints on how to do that
>      >     would be
>      >     > really appreciated...
>      >
>      >     If your disk is only rarely accessed (i.e. a secondary HD, not
>      >     containing the root filesystem), look at "hdparm", more
>      >     specifically the
>      >     -S option.
>      >
>      >     If you would like to spin down your main HD (e.g. on a laptop),
>      >     look at
>      >     app-laptop/laptop-mode-tools.
>      >
>      >     -- Remy
>      >
>      >
>      > does hdparm work on sata hard disks aswell? because i couldn't find
>      > such an option
>      > in sdparm
>      >
>      > Danis
> 
>      From the man page, right at the top no less.  o_O
> 
>     NAME
>           hdparm - get/set SATA/IDE device parameters
> 
>     It should work for SATA to.
> 
>     Dale
> 
>     :-)  :-)
> 
> 

Re: [gentoo-user] Re: Hard disk power save

[Danis Petkakis]

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you're telling me i have to umount it first and then put it to sleep?
because it is mounted it cannot be put to sleep?

2009/2/7 Nikos Chantziaras <realnc@arcor.de>

> still mounted.
> waking it up if it's
> almost always something
> put it too sleep. There's
> umount it before you
> Usually, you have to
>
> Danis Petkakis wrote:
>
>> ok i tried 'hdparm -y /dev/sda' and though i can hear a little noise as if
>> the disk is in sleep
>> mode after a while (5 secs) it makes a noise as though it is spinning up
>> again...also
>> 'hdparm -C /dev/sda' shows the disk active/idle...i also tried with
>> 'hdparm -S12 /dev/sda'
>> but couldn't tell whether it is working or not...how can i make sure it
>> actually works?
>>
>> 2009/2/7 Dale <rdalek1967@gmail.com <mailto:rdalek1967@gmail.com>>
>>
>>    Danis Petkakis wrote:
>>     > 2009/2/7 Remy Blank <remy.blank@pobox.com
>>    <mailto:remy.blank@pobox.com> <mailto:remy.blank@pobox.com
>>
>>    <mailto:remy.blank@pobox.com>>>
>>     >
>>     >     Danis Petkakis wrote:
>>     >     > hello there i would like to know if there is such a thing
>>    as a power
>>     >     > saving scheme as far as hard disks are
>>     >     > concerned...i would like my hard disks to spin down when they
>>     >     are not
>>     >     > being accessed after a defined
>>     >     > period of time...is that possible? any hints on how to do that
>>     >     would be
>>     >     > really appreciated...
>>     >
>>     >     If your disk is only rarely accessed (i.e. a secondary HD, not
>>     >     containing the root filesystem), look at "hdparm", more
>>     >     specifically the
>>     >     -S option.
>>     >
>>     >     If you would like to spin down your main HD (e.g. on a laptop),
>>     >     look at
>>     >     app-laptop/laptop-mode-tools.
>>     >
>>     >     -- Remy
>>     >
>>     >
>>     > does hdparm work on sata hard disks aswell? because i couldn't find
>>     > such an option
>>     > in sdparm
>>     >
>>     > Danis
>>
>>     From the man page, right at the top no less.  o_O
>>
>>    NAME
>>          hdparm - get/set SATA/IDE device parameters
>>
>>    It should work for SATA to.
>>
>>    Dale
>>
>>    :-)  :-)
>>
>>
>>
>
>

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Re: [gentoo-user] Re: Hard disk power save

[Dale]

Danis Petkakis wrote:
> you're telling me i have to umount it first and then put it to sleep?
> because it is mounted it cannot be put to sleep?
>

If you have a journalized file system, you may have to.  Every time it
updates the journal it will spin the drive back up.  I think some of the
gurus need to know what file system you are using and then go from
there.  Spinning down a drive can be done but some situations won't
allow that to happen to well.

Dale

:-)  :-)

Re: [gentoo-user] Re: Hard disk power save

[Danis Petkakis]

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in both drives i try to spin down i use ntfs as filesystem...

2009/2/7 Dale <rdalek1967@gmail.com>

> Danis Petkakis wrote:
> > you're telling me i have to umount it first and then put it to sleep?
> > because it is mounted it cannot be put to sleep?
> >
>
> If you have a journalized file system, you may have to.  Every time it
> updates the journal it will spin the drive back up.  I think some of the
> gurus need to know what file system you are using and then go from
> there.  Spinning down a drive can be done but some situations won't
> allow that to happen to well.
>
> Dale
>
> :-)  :-)
>
>

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Re: [gentoo-user] Re: Hard disk power save

[Stroller]

He wrote the lines of his post upside down, because he thinks you're  
wrong to top-post.

If you read it as:
>> Usually, you have to
>> umount it before you
>> put it too sleep. There's
>> almost always something
>> waking it up if it's
>> still mounted.

It makes perfect sense & you don't need to ask any further questions.

Stroller.


On 7 Feb 2009, at 19:19, Danis Petkakis wrote:

> you're telling me i have to umount it first and then put it to sleep?
> because it is mounted it cannot be put to sleep?
>
> 2009/2/7 Nikos Chantziaras <realnc@arcor.de>
>> still mounted.
>> waking it up if it's
>> almost always something
>> put it too sleep. There's
>> umount it before you
>> Usually, you have to
>

Re: [gentoo-user] Re: Hard disk power save

[Danis Petkakis]

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ok thank you for your response...will do as suggested...

Danis

2009/2/8 Stroller <stroller@stellar.eclipse.co.uk>

> He wrote the lines of his post upside down, because he thinks you're wrong
> to top-post.
>
> If you read it as:
>
>> Usually, you have to
>>> umount it before you
>>> put it too sleep. There's
>>> almost always something
>>> waking it up if it's
>>> still mounted.
>>>
>>
> It makes perfect sense & you don't need to ask any further questions.
>
> Stroller.
>
>
>
> On 7 Feb 2009, at 19:19, Danis Petkakis wrote:
>
>  you're telling me i have to umount it first and then put it to sleep?
>> because it is mounted it cannot be put to sleep?
>>
>> 2009/2/7 Nikos Chantziaras <realnc@arcor.de>
>>
>>> still mounted.
>>> waking it up if it's
>>> almost always something
>>> put it too sleep. There's
>>> umount it before you
>>> Usually, you have to
>>>
>>
>>
>

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Re: [gentoo-user] Re: Hard disk power save

[Neil Bothwick]

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On Sun, 8 Feb 2009 11:51:00 +0200, Danis Petkakis wrote:

> ok thank you for your response...will do as suggested...

The suggestion was not to top-post...


-- 
Neil Bothwick

"Do not handicap your children by making their lives easy."
 -- Robert Heinlein

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Re: [gentoo-user] Re: Hard disk power save

[Stroller]

On 8 Feb 2009, at 13:39, Neil Bothwick wrote:
> On Sun, 8 Feb 2009 11:51:00 +0200, Danis Petkakis wrote:
>
>> ok thank you for your response...will do as suggested...
>
> The suggestion was not to top-post...

He was replying to one of my messages, and I did not suggest that.

I was actually slightly narked at having to futz around with the  
previous message - which did not make any sense the first time I read  
it, so no doubt it made no sense at all to a less-capable English  
speaker - copying & pasting 6 times, just so that Nikos could make a  
"clever" point.

I do not object to top-posting myself, but I find that Danis Petkakis'  
habit of "opposite posting" (posting at the top when all previous  
replies have been at the bottom, or posting at the bottom when all  
previous replies have been at the top) makes his posts very difficult  
to read.

But we cannot blame him for doing so because nobody has taken the time  
to *patiently* explain what he's doing wrong, or point him to a URL  
that does so.

Stroller.

Re: [gentoo-user] Re: Hard disk power save

[Neil Bothwick]

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On Mon, 9 Feb 2009 01:37:00 +0000, Stroller wrote:

> >> ok thank you for your response...will do as suggested...  
> >
> > The suggestion was not to top-post...  
> 
> He was replying to one of my messages, and I did not suggest that.

No, although the response was "will do as suggested" not "will do as you
suggested".

> I was actually slightly narked at having to futz around with the  
> previous message - which did not make any sense the first time I read  
> it, so no doubt it made no sense at all to a less-capable English  
> speaker - copying & pasting 6 times, just so that Nikos could make a  
> "clever" point.

Yes, a clear explanation of why the list prefers text to appear in
chronological order would have been better, and I was somewhat complicit
in continuing the obtuse complaints.

Danis, please do not top-post. Instead, place your comments so they
follow what your are replying to. That way the mail can be read in its
natural order, which makes it much easier to understand.


-- 
Neil Bothwick

Top Oxymorons Number 5: Twelve-ounce pound cake

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Re: [gentoo-user] Re: Hard disk power save

[Stroller]

On 9 Feb 2009, at 02:30, Neil Bothwick wrote:

> On Mon, 9 Feb 2009 01:37:00 +0000, Stroller wrote:
>
>>>> ok thank you for your response...will do as suggested...
>>>
>>> The suggestion was not to top-post...
>>
>> He was replying to one of my messages, and I did not suggest that.
>
> No, although the response was "will do as suggested" not "will do as  
> you
> suggested".

I assumed the suggestion he was responding to was to umount drives  
before putting them to sleep.

Stroller.

Re: [gentoo-user] Re: Hard disk power save

[Danis Petkakis]

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2009/2/9 Neil Bothwick <neil@digimed.co.uk>

> On Mon, 9 Feb 2009 01:37:00 +0000, Stroller wrote:
>
> > >> ok thank you for your response...will do as suggested...
> > >
> > > The suggestion was not to top-post...
> >
> > He was replying to one of my messages, and I did not suggest that.
>
> No, although the response was "will do as suggested" not "will do as you
> suggested".
>
> > I was actually slightly narked at having to futz around with the
> > previous message - which did not make any sense the first time I read
> > it, so no doubt it made no sense at all to a less-capable English
> > speaker - copying & pasting 6 times, just so that Nikos could make a
> > "clever" point.
>
> Yes, a clear explanation of why the list prefers text to appear in
> chronological order would have been better, and I was somewhat complicit
> in continuing the obtuse complaints.
>
> Danis, please do not top-post. Instead, place your comments so they
> follow what your are replying to. That way the mail can be read in its
> natural order, which makes it much easier to understand.
>
>
> --
> Neil Bothwick
>
> Top Oxymorons Number 5: Twelve-ounce pound cake
>

indeed i did not understand the first suggestion about top-posting and did
not
know about this rule...it is the first time i'm taking part in a list so i
will try to behave
with the rules of it and not make any difficulties so i can get the most out
of your
help when i am in trouble...thanks again for pointing that out which i did
not understand
until the last 2 posts i've read...

Danis

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Re: [gentoo-user] Re: Hard disk power save

[Neil Bothwick]

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On Mon, 9 Feb 2009 12:25:07 +0200, Danis Petkakis wrote:

> indeed i did not understand the first suggestion about top-posting and
> did not
> know about this rule...it is the first time i'm taking part in a list
> so i will try to behave
> with the rules of it and not make any difficulties so i can get the
> most out of your
> help when i am in trouble...thanks again for pointing that out which i
> did not understand
> until the last 2 posts i've read...

That's OK. There is no FAQ or other guidelines for this list sent to
new subscribers, so the first you know about this preference is when
someone asks you to respect it.

Personally, I find top-posting ugly, counter-intuitive and inefficient,
butt hen I'm an old fart with too many years of starting at the top of
the page and reading to the bottom behind him :(


-- 
Neil Bothwick

Why do programmers get Halloween and Christmas confused?
Because oct 31 is the same as dec 25.

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[gentoo-user] Re: Hard disk power save

[Remy Blank]

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Danis Petkakis wrote:
> ok i tried 'hdparm -y /dev/sda' and though i can hear a little noise as
> if the disk is in sleep
> mode after a while (5 secs) it makes a noise as though it is spinning up
> again...

That's why I mentioned laptop-mode-tools. If configured properly, it
ensures that the drive will not spin up a few seconds after having
stopped, by buffering all writes. For example, I have configured my
laptop to buffer writes for up to 10 minutes.

The drawback, obviously, is that I can loose up to 10 minutes of work if
I have a power interruption, but on a laptop, this never happens. I'm
not sure I would want to have that on a server, though.

-- Remy


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