Pros & Cons of Stacking HDs

[Bill Connelly]

Any experience with stacking drives in the sleds offered under the  
vent fan of a Quicksilver 2002?


My Seagates (750 & 500GB) look awfully close together run off the  
onboard controller. For heat and ventilation reasons, would prefer  
they be separated, but even using a longer style non-CS IDE cable,  I  
cannot get the distance needed from the last two connectors, to use  
the middle sled for the 2nd one.


Would putting the double sled in the middle slot be better or possibly  
worse (no longer under the vent fan)? I have the length from the  
onboard connection to the end 2 connectors ...


Any suggestions? IDE cable with more length between the end connectors  
available?


Both my ATA controllers by Sonnet  are too old to use for a PCI slot  
solution, and don't offer > 128GB capacity.


I hope to move to SATA later ...

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Re: Pros & Cons of Stacking HDs

[Dan]

At 11:09 AM -0500 3/9/2010, Bill Connelly wrote:

Any experience with stacking drives


Do not stack bare HDs directly upon each other, ever.

As long as the drives have some reasonable air gap between them, 
there shouldn't be a problem.


I often don't have sleds... so I make small corregated coardboard 
spacers and some tape.


- Dan.
--
- Psychoceramic Emeritus; South Jersey, USA, Earth.

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Re: Pros & Cons of Stacking HDs

[dc]

On Mar 9, 11:09 am, Bill Connelly  wrote:
> Any experience with stacking drives in the sleds offered under the  
> vent fan of a Quicksilver 2002?
> My Seagates (750 & 500GB) look awfully close together run off the  
> onboard controller. For heat and ventilation reasons, would prefer  
> they be separated, but even using a longer style non-CS IDE cable,  I  
> cannot get the distance needed from the last two connectors, to use  
> the middle sled for the 2nd one.

Use a piece of string to layout and measure the length you need and
then search for something that fits, I use round IDE cables similar to
this:
http://cgi.ebay.com/New-Mad-Dog-24-Blue-Dual-Device-ATA-133-IDE-Cable_W0QQitemZ140349152817QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item20ad761e31
Somewhere in the back of a closet I have a crimper tool, spools of IDE
and SCSI ribbon cables, connectors etc. for making custom length
cables, they are very easy to make. Maybe you can find an IT person
who still has one of these:
http://cgi.ebay.com/IDC-IDS-Ribbon-Cable-Crimper-Crimping-Crimp-Tool_W0QQitemZ200442851612QQcmdZViewItemQQptZAU_Computers_Networking_Accessories?hash=item2eab53311c
or a welder who has a pair of these, which work just as well:
http://cgi.ebay.com/2PC-10-WELDING-FLAT-JAW-CLAMP-LOCKING-PLIERS-GRIP-VICE_W0QQitemZ350323967584QQcmdZViewItemQQptZAU_Hand_Tools?hash=item5190ef8660

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Re: Pros & Cons of Stacking HDs

[t...@io.com]

On Mar 9, 5:50 pm, Dan  wrote:
> At 11:09 AM -0500 3/9/2010, Bill Connelly wrote:
>
> >Any experience with stacking drives
>
> Do not stack bare HDs directly upon each other, ever.
>
> As long as the drives have some reasonable air gap between them,
> there shouldn't be a problem.
>
> I often don't have sleds... so I make small corregated coardboard
> spacers and some tape.

I use flat angle brackets from the hardware store.  I can't remember
if I get the 1.5" or the 2".   Just get four of them, and screw them
onto the sides of the drives.   This will hold one drive above the
other with a gap depending on the size of bracket you bought.

These are the flat L shaped (equal leg length) pieces of metal about
1/2" wide with holes in the legs for screws.   You can also just get
straight (rectangular) flat metal bits with the screw holes.  I can't
remember why I use the 'L' shaped ones, but there was some reason at
the time

Jeff Walther

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Re: Pros & Cons of Stacking HDs

[Bill Connelly]

On Mar 10, 2010, at 3:49 PM, t...@io.com wrote:


I use flat angle brackets from the hardware store.  I can't remember
if I get the 1.5" or the 2".   Just get four of them, and screw them
onto the sides of the drives.   This will hold one drive above the
other with a gap depending on the size of bracket you bought.



The sleds provided by Apple, only allow about 1/4" between 2 Seagate  
HDs (750GB and 500GB ones).


Just doesn't seem like enough ... especially considering the circuit  
board on the bottoms that are exposed.


Seems to be working in the short run ... but I'll scrounge up some  
brackets and see what that offers (I have things like that "filed  
away" out in my workshop ...


Thanks to all who responded.

I have a number of plastic ones from my days with the 8500s and  
9500s ... some still in use! ... although I'm considering retiring my  
8500 with full compliment of memory with a Sonnet 450MHz G4 still  
operational and ATI Radeon 7000ME ... LEM List here I might come ...  
running Tiger 10.4.11 very well ...


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Re: Pros & Cons of Stacking HDs

[Len Gerstel]

On Mar 10, 2010, at 4:09 PM, Bill Connelly wrote:



On Mar 10, 2010, at 3:49 PM, t...@io.com wrote:


I use flat angle brackets from the hardware store.  I can't remember
if I get the 1.5" or the 2".   Just get four of them, and screw them
onto the sides of the drives.   This will hold one drive above the
other with a gap depending on the size of bracket you bought.



The sleds provided by Apple, only allow about 1/4" between 2  
Seagate HDs (750GB and 500GB ones).


Just doesn't seem like enough ... especially considering the  
circuit board on the bottoms that are exposed.



I had 2 x 120GBs stacked using the apple bracket in my DA, along with  
320 and 500GB SATA drives single layered next to them. I had no  
issues with heat with either a 533 or 933 QS processor in there. When  
I put a dual 1.2GHz G4, THEN I had heat issues and ran with the door  
open.


FWIW,
Len

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Re: Pros & Cons of Stacking HDs

[Bill Connelly]

On Mar 10, 2010, at 4:14 PM, Len Gerstel wrote:


I had 2 x 120GBs stacked using the apple bracket in my DA, along  
with 320 and 500GB SATA drives single layered next to them. I had no  
issues with heat with either a 533 or 933 QS processor in there.  
When I put a dual 1.2GHz G4, THEN I had heat issues and ran with the  
door open.




I'm sort of in between ... my QS any way ... a native Dual 1GHz G4 on  
my QS 2002 ( and an Apple Dual 533 installed on my Digital Audio).


Was only dreaming about the SATAs in my QS ...

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Re: Pros & Cons of Stacking HDs

[Bruce Johnson]

On Mar 10, 2010, at 2:09 PM, Bill Connelly wrote:



The sleds provided by Apple, only allow about 1/4" between 2 Seagate  
HDs (750GB and 500GB ones).




That works just fine. The spacing is just as small in our big rack- 
mounted SAN and that has 12 or 16 big drives in it grinding along 24/7.


--
Bruce Johnson
University of Arizona
College of Pharmacy
Information Technology Group

Institutions do not have opinions, merely customs


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Re: Pros & Cons of Stacking HDs

[John Musbach]

Replace those droves asap since grinding means failing hard drive.

On 3/10/10, Bruce Johnson  wrote:
>
> On Mar 10, 2010, at 2:09 PM, Bill Connelly wrote:
>
>>
>> The sleds provided by Apple, only allow about 1/4" between 2 Seagate
>> HDs (750GB and 500GB ones).
>>
>
> That works just fine. The spacing is just as small in our big rack-
> mounted SAN and that has 12 or 16 big drives in it grinding along 24/7.
>
> --
> Bruce Johnson
> University of Arizona
> College of Pharmacy
> Information Technology Group
>
> Institutions do not have opinions, merely customs
>
>
> --
> You received this message because you are a member of G-Group, a group for
> those using G3, G4, and G5 desktop Macs - with a particular focus on Power
> Macs.
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>


-- 
Best Regards,

John Musbach

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Re: Pros & Cons of Stacking HDs

[Bill Christensen]

At 11:09 AM -0500 3/9/10, Bill Connelly wrote:
Any experience with stacking drives in the sleds offered under the 
vent fan of a Quicksilver 2002?


My Seagates (750 & 500GB) look awfully close together run off the 
onboard controller. For heat and ventilation reasons, would prefer 
they be separated, but even using a longer style non-CS IDE cable, 
I cannot get the distance needed from the last two connectors, to 
use the middle sled for the 2nd one.


Would putting the double sled in the middle slot be better or 
possibly worse (no longer under the vent fan)? I have the length 
from the onboard connection to the end 2 connectors ...


Any suggestions? IDE cable with more length between the end 
connectors available?





I don't have any QSs, but in my Sawteeth, DA and GigE I was able to 
flip the second drive over, putting the two drives' IDE connectors 
closer together.  Just close enough that I could mount ONE of them on 
a sled and have the other next to it, almost straight.  Since my 
machines are typically only moved when I need to get inside 'em, I'm 
not that concerned about having everything perfectly nailed down and 
it worked for me.


When I do use a sled it's for a single drive in the top slot of a 
dual slot type, to increase the potential airflow around it.


It would be nice if they just made the cables with a little more 
space betwween those two connectors!



--
Bill Christensen


Green Building Professionals Directory: 
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Straw Bale Registry: 
Books/videos/software: 

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Re: Pros & Cons of Stacking HDs

[Bill Connelly]

On Mar 12, 2010, at 10:19 PM, Bill Christensen wrote:


I don't have any QSs, but in my Sawteeth, DA and GigE I was able to  
flip the second drive over, putting the two drives' IDE connectors  
closer together.  Just close enough that I could mount ONE of them  
on a sled and have the other next to it, almost straight.  Since my  
machines are typically only moved when I need to get inside 'em, I'm  
not that concerned about having everything perfectly nailed down and  
it worked for me.


QSs ... DAs ... Sawteeth ... GigEs ... Yikes! ... mostly the same  
casing, I think. I also have a DA and a Yikes ...


When I do use a sled it's for a single drive in the top slot of a  
dual slot type, to increase the potential airflow around it.


I like that arrangement a lot, too.


It would be nice if they just made the cables with a little more  
space betwween those two connectors!


That's the idea ... I think I saw some on cablestogo:

http://www.cablestogo.com/product.asp?cat_id=906&sku=50051

But they say those connectors are at 0-12-18 ... so still only 6  
inches at the end 


Searching  ...

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