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Subject: Re: Re[2]: Hard Disk Question
From: roland (
Date: 2004-05-08

i`m no mechanic - but - regarding the new 1.8" HDD models:

shouldn`t such HDDs be more robust than a 2.5" HDD in general ?
Less weight means less forces - so probably a tiny HDD is more
robust than a bigger HDD ?

i don`t really know, but a quick comparison of datasheets tells
me, that regarding shock resistency , the 1.8" Models from hitachi even surpasses
that models with "The industry's highest operational shock rating
of up to 250Gs" (that is

1.8" (C4K40) is rated 300G / 1,000-1,200G/1ms non-operating shock

so i would tell, it`s probably the better device for portable mp3 players - regarding
mechanical impact.

please don`t take this as an advice to buy an 1.8" model - i didn`t test mine in rough
environment yet - so i don`t know if it is resistent to RLD problem.


> into it and was blocking some of the push buttons. I was really
> surprised about the bad soldering quality of that tiny machine. This I
I was even shocked! :D

----- Original Message -----
From: "RudiS" <>
To: "Rockbox development" <>
Sent: Friday, May 07, 2004 4:43 PM
Subject: Re[2]: Hard Disk Question

> Hi Linus,
> So you mean, that is not the altitude, that effects my JB in that
> way? Hm, I thought that is the altitude, because I have more "hangs"
> if I climb up from 3800m to 4700m than the way down. But may be you
> are right, because my JB is fixed in my 4x4 Truck and in Northern
> Chile the roads are very rough and sandy ...
> Ok, another harddrive, that's what I thought too, when I open up that
> thread. Is there a good choice especially for my JB? I have
> another 40GB Hitachi /IBM, but Hitachi isn't the right choice, or
> depends on the model itself? Power consumption and switching on
> current are important too, I guess.
> So lets see, if the daily build improves a bit my situation, I report
> it here for all of you guys.
> Last week I had to open up my JB, because some tea has found it's way
> into it and was blocking some of the push buttons. I was really
> surprised about the bad soldering quality of that tiny machine. This I
> could do it even better. The Label says "Made in China".... hm :-) But
> that Archos hasn't got a good hand to choose that type of harddisk as
> the standard one, surprised me even more. Did you guys changed all
> your harddrives already?
> Thanks Linus, for your help.
> RudiS
> Am Freitag, 7. Mai 2004 um 01:50 schrieben Sie:
> LNF> RudiS wrote:
> >> Sorry, couldn't answer much earlier,
> >> Here the output from the disk debug menu:
> >> -------------------------------------------
> >> Model
> >> HITACHI_DK23DA-20
> LNF> This is your problem. You have a hard disk that is sensitive to shock,
> LNF> and sometimes hangs for long periods (typically 30s-1min) when shaken.
> LNF> This is known as the "Red LED Death", RLD, in the Rockbox community. I
> LNF> have made some changes in the ATA driver in the daily builds that might
> LNF> improve the situation, but it won't fix it 100%. You safest bet is to
> LNF> get another hard drive.
> LNF> Linus
> LNF> _______________________________________________
> LNF>
> --
> Mit freundlichen Grüssen
> RudiS
> _______________________________________________


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