2,5" hdd laptop & Linux

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I'm looking for a 2,5" sata hdd, for my laptop, and use it with linux distr
I think to buy a standard device (not a ssd) for a size of 500GB.
I would simply buy a brand-model that hasn't problem with linux.
Does anyone suggest me a name?
I'm worried (after some online search to retrieve info and opinions on mode
ls that i've seen on sale ḿbranded wd,hitachi..) about: 1) some "bug" in
 many hdd's firmwares for about the power saving function (sympotms of cont
inuosly sound-clicking cused by continuously parking/reactive of the heads)
 2)Others less worried issues as "alignment partition"



Re: 2,5" hdd laptop & Linux

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    The brand of drive won't matter to Linux.  The controller might but
almost certainly won't.  As far as consumer grade laptop drives go I like
Western Digital or Fujitsu.  But there's not that much difference.  Samsung
drives are Ok and cheap.

    Look into a SSD though.  Makes a big performance difference.  
Subjectively, won't help benchmarks that much.

Re: 2,5" hdd laptop & Linux

On Sat, 23 Mar 2013 15:06:02 +0000 (UTC), wrat@panix.com (the wharf rat)

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One thing to add: naked HDDs, to be built in internally in a PC, are
quite expensive, compared with external HDDs that have an enclosure and
power supply.  

The question is: why build in a LARGE HDD? It only causes trouble. If
the notebook is used mobile, the an extra HDD might be a nuisance, but
if the computer is used in an office only, the HDD being external has
big advantages, may it be security and ease of use.  

Crowd-founding is for money, crowd-publishing is for mankind.


Re: 2,5" hdd laptop & Linux

Il giorno sabato 23 marzo 2013 16:06:02 UTC+1, the wharf rat ha scritto:

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Ok, but problem is know what model, (now on sale) has these simple features is
Linux compatible, .
I've found, for example that latest wd drives are very problematic (issue is
head auto parks non standard function) with Linux (and also hitachi or seagate
and samsung).
My temporary solution: Find a laptop model sold with Linux and buy their hdd.
Actually, with this "heuristc" I've selected a Toshiba MK series that is hdd of
hp laptop selled with ubuntu.  

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Yes the alternative is ssd.

Thanks for reply

Re: 2,5" hdd laptop & Linux

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    The issue is WD's change to 4096 byte blocks.  Linux is perfectly
OK with this but Windows is not.  WD's fix was to have the drive firmware
lie about the geometry and claim "standard" 512 byte blocks.  That breaks
on ANY OS if the partition ends on a boundary not divisible by 8.  In Linux,
you can easily work around this nonsense by manually creating partitions
and ensuring this.  The drives aren't incompatible.

    So don't use the brand new "advanced format" WD drives, use a
real Enterprise drive and SAS, or use an older and cheaper drive for  
your Linux system.  Or try a Samsung :-)

Re: 2,5" hdd laptop & Linux

Il giorno marted́ 26 marzo 2013 16:30:52 UTC+1, the wharf rat ha scritto:
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Ok, thanks, but I'm worried primarily about this issue:

Now on sale there are some hdd with this issue, and solution are trick, or  
there aren't solution.

I've seen also, in many forum on web, some users speak about  failure of th
ese devices, only after a few months. These threads are often about ask sug
gest for data recovery,  but I think this is  too frequent and strange, and
 probably users haven't awareness that with some s.o. their device could ha
ve abnormals behaviours with consequnces on devices's life  .

However after an attempt with an hdd 2,5", I'm seriously thinking to pass t
o a ssd device (also because sata-300 on 60/128GB aren't so expensive).
In my netbook hdd slot, is specified compatible with an hdd's highness of 9
.5mm. I've seen that numerous interesting ssd are in the 7mm form factor.
Do you think is equal or I will have some trouble with sata connector posit
ion, or with holes screw's position (in my netbook, the device is put in a  
little jail / case with four screws, then slided it until connects it on th
e sata connector).

Re: 2,5" hdd laptop & Linux

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    Seems pretty much a non-issue.  It's not because of Linux (you're
just reading about it on a kernel forum :-), but because of a buggy interaction
between certain laptop IDE drives and power management.  It seems to depend
on the installation platform as well as the particular drive since manifestation
is dependent on IO patterns.

    The issue here with WD is that WD chooses to require their own
special program to reset APM parameters on a few models (I'm not sure you can  
use hdparm on their "Green" drives).  That could be seen as "incompatibility"
but it's really WD's choice to support only Windows.  That's a good reason
to avoid WD.  If you end up with a set of hardware that manifests this bug
it's not really a big deal, and can be worked around easily with hdparm.

    Frankly, you can avoid all these kinds of things by using last  
generation hardware for Linux.  Older stuff is well supported and Linux
doesn't need the latest hardware to run rings around Windows systems.

Re: 2,5" hdd laptop & Linux

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Uhm I agree, it isn't a kernel's bug, or a linux issue, but for what I've u
nderstood seems a non-standard use of ata commands (probably specific vendo
r extensions).
In particular with newer hdds, to obtain best performance in power saving a
nd to make them more shock resistent  head's device should be parked when d
isk is unused for a time.
In practice,  the result  is that if s.o. is booted by the hdd it (in trans
parent manner , to  user) continuosly accesses to hdd.  
The Device doesn't understand correctly commands relatively poer save manag
ement, has false beliefs on the world, and it cycles to parks unparks the h
eads (with deleterious effects on hdd's life).

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of course, after this experience, I will avoid them.
The Support center has told me simply:" here there are utilities for your m
odel, with which you can diagnose the hdd health (note: I've just told them
 smart count load/unload, make diagnose wasn't my problem), there aren't fi
x for firmware, for your model there aren't software to tune this problem,  
but there is for others models, and has gave me the link, but also told me  
that this was not supported by WD ( looking on web, other users have report
ed that seems don't work)

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ok, is correct , in my experience I've used this utility and its .conf file
,   stopping the autopark function.  
But honestly, I'm not sure of the consequence on policy's device power save
 managing   (certainly, when the machine goes in stand-by, also hdd goes, b
ut I seems that hdd can make a smart use of power, for example  when it's n
ot fully used)
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I'm not sure to understand your suggest (this only because English isn't my
 language, excuse me): Yuo suggest me, to avoid these problems,  to prefer  
old hardware (probably without the cited  smart parking feature )

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