OESF | ELSI | pdaXrom | OpenZaurus | Zaurus Themes | Community Links | Ibiblio

IPB

Welcome Guest ( Log In | Register )

 
Reply to this topicStart new topic
> Self Powered 2.5" Ext Drives
darkage
post Apr 26 2006, 12:50 AM
Post #1





Group: Members
Posts: 23
Joined: 11-August 05
Member No.: 7,833



Im about to purchase a 2.5" ext enclosure and whack in my own drive.

I've heard that 40GB non-WD drives would be the max size to go unpowered.

Anything higher would need a separate power source.

Is this true? I would like to go higher than 40GB, if not 40GB it is.
Go to the top of the page
 
+Quote Post
JohnX
post Apr 26 2006, 01:08 AM
Post #2





Group: Members
Posts: 126
Joined: 4-May 05
From: Lynnwood, WA, US
Member No.: 7,070



If you're trying to attach it to the Z you won't get away with running any 2.5", 3.5" or 1.8" drive without an AC adapter.
Go to the top of the page
 
+Quote Post
dbowden
post Apr 26 2006, 06:02 AM
Post #3





Group: Members
Posts: 48
Joined: 23-May 05
From: Detroit, Mi
Member No.: 7,194



QUOTE(JohnX @ Apr 26 2006, 04:08 AM)
If you're trying to attach it to the Z you won't get away with running any 2.5", 3.5" or 1.8" drive without an AC adapter.
*

Actually you can -- you just need to have batteries for the HD as well. It doesn't need to be AC.

I use a cheap HD based .mp3 player (Archos Jukebox, bought used for $50) with a 30GB drive that runs off 4AA batteries. You can theoretically update it to 127 GB, if you need to.

David
Go to the top of the page
 
+Quote Post
darkage
post Apr 26 2006, 06:50 AM
Post #4





Group: Members
Posts: 23
Joined: 11-August 05
Member No.: 7,833



Yep I plan to add a PSP power pack to the ext hdd so that the Z can use it. But a power source for taking the ext. hdd to friends pc's would be a pain hence the self powered question.
Go to the top of the page
 
+Quote Post
JohnX
post Apr 26 2006, 01:21 PM
Post #5





Group: Members
Posts: 126
Joined: 4-May 05
From: Lynnwood, WA, US
Member No.: 7,070



Ah...I thought you were asking about powering it from the Zaurus. What I've heard (and experienced) with USB-powered external drives is that two things effect whether the drive will work on USB power alone:
1) How much current the host will provide from it's USB port
2) How much power the drive takes to spin up.

Laptops are especially stingy in terms of supplying power over USB. Also size isn't necessarily a valid indicator of how much power a drive will draw to spin up. For example, I'd be willing to bet that a 40GB 7,200 RPM drive will take more power to spin up than a 4,200 RPM 80GB drive. What's worse is that sometimes the manufacturer's claimed power draw on spin up isn't accurate either. Your best bet is probably to ask people what drive they've had good luck with.
Go to the top of the page
 
+Quote Post
arniel
post Apr 27 2006, 02:41 AM
Post #6





Group: Members
Posts: 103
Joined: 2-February 04
From: UK
Member No.: 1,563



QUOTE(JohnX @ Apr 26 2006, 09:08 AM)
If you're trying to attach it to the Z you won't get away with running any 2.5", 3.5" or 1.8" drive without an AC adapter.
*


I'm running a Toshiba 1.8" drive off of a CF -> PCMCIA adapter on my SL5500.
Go to the top of the page
 
+Quote Post

Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 



RSS Lo-Fi Version Time is now: 23rd November 2014 - 10:55 PM