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From: Folkert Rienstra on 22 Apr 2008 12:31
Yousuf Khan wrote in news:480d8632(a)news.bnb-lp.com
> I tend to think that it would be best that an external drive enclosure
> would be best if it had active cooling built-in (i.e. a fan). However,

> I've recently seen a drive fail inside an actively-cooled enclosure so
> badly that Spinrite couldn't even recover it.

Wow, Spinrite couldn't even recover the drive. That's really bad.
Have you called Steve and complained about that?
Obviously recovering a cooled drive should be a doddle for SpinRite.
I would ask my money back if I were you.

> So I'm not sure about the value of active cooling anymore.
> I have seen an aluminum portable enclosure with a lot of good
> features (USB2.0 & e-SATA)

> for a really cheap price, but from what I see of it, it doesn't seem to
> have any fans in it.

Yeah, maybe somebody even makes a profit on it. Figure that.
It should be forbidden.

> Should I worry about it, or is aluminum a good enough conductor
> of heat by itself?
>
> Yousuf Khan
From: Rod Speed on 22 Apr 2008 15:55
Folkert Rienstra <see_reply-to(a)myweb.nl> wrote
> Rod Speed wrote
>> Yousuf Khan <bbbl67(a)yahoo.com> wrote:

>>> I tend to think that it would be best that an external drive enclosure
>>> would be best if it had active cooling built-in (i.e. a fan). However,
>>> I've recently seen a drive fail inside an actively-cooled enclosure
>>> so badly that Spinrite couldn't even recover it. So I'm not sure
>>> about the value of active cooling anymore.

>> The technical term for that is 'pathetically inadequate sample'

>>> I have seen an aluminum portable enclosure with a lot of good
>>> features (USB2.0 & e-SATA) for a really cheap price, but from what
>>> I see of it, it doesn't seem to have any fans in it. Should I worry
>>> about it, or is aluminum a good enough conductor of heat by itself?

>> Nope, some drives do get stinking hot in aluminium enclosures, particularly the
>> enclosures that dont have a good conductive heat path from the drive to the enclosure.

> Which is most all of them if they don't use heat conductive sheeting
> between the drive sides and the mounting rails (and the mounting
> rails and the rest of the enclosure if not an integral part of the shell).
> Worse even for those that use the bottom mounting holes of the drive.

> Also, blackened aluminum radiates heat better to
> the environment than blank anodized aluminum.

The main way they lose heat is by convection from the outside, not radiation.

>> Then again, some enclosures with fans dont move much air over the drive either.

>> At least with eSATA you can monitor the drive SMART temperature.

> Provided they don't use an eSATA conversion chip with a limited vocabulary.



From: Rod Speed on 22 Apr 2008 15:59
bbbl67 <yjkhan(a)gmail.com> wrote
> Rod Speed <rod.speed....(a)gmail.com> wrote
>> Yousuf Khan <bbb...(a)yahoo.com> wrote:

>>> I tend to think that it would be best that an external drive enclosure
>>> would be best if it had active cooling built-in (i.e. a fan). However,
>>> I've recently seen a drive fail inside an actively-cooled enclosure
>>> so badly that Spinrite couldn't even recover it. So I'm not sure
>>> about the value of active cooling anymore.

>> The technical term for that is 'pathetically inadequate sample'

> Maybe,

No maybe about it.

> but it makes you wonder, considering the enclosure was from a
> well-known brand (Everex), and the drive was only six-months old.

You dont know how the drive would have gone used internally.

> Spinrite 6.0 went through it and found hundreds of unreadable,
> only partially recoverable, sectors just in the first few megabytes,

Thats not unusual with a drive that got stinking hot.

> partition table was completely trashed along with just about everything else.

Not surprising with that many errors in the first few MB.

>> Then again, some enclosures with fans dont move much air over the drive either.

> That's what I figure happened to this guy whose drive got trashed.

Yeah, plenty of them just have a fan that doesnt do much at all.

>> At least with eSATA you can monitor the drive SMART temperature.

> That is a good point.

> Yousuf Khan


From: Yousuf Khan on 23 Apr 2008 01:01
Folkert Rienstra wrote:
>> At least with eSATA you can monitor the drive SMART temperature.
>
> Provided they don't use an eSATA conversion chip with a limited vocabulary.

Isn't eSATA just simply SATA with a different connector?

Yousuf Khan
From: Timothy Daniels on 23 Apr 2008 01:55
"Yousuf Khan" wrote:
> Isn't eSATA just simply SATA with a different connector?
>
> Yousuf Khan

eSATA specs include a connector that accommodates
a shielding connection to ground, a shielded cable, and
wider windows on the transceiver levels due to the longer
cable length allowed (up to 2 meters). Here's a white paper
by Silicon Image:
https://www.sata-io.org/documents/External%20SATA%20WP%2011-09.pdf

*TimDaniels*


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