thinkpads.com Support Community Forum Index Bill Morrow's thinkpads.com Open Forum - The Original Thinkpad Support Forum
Follow ThinkpadsForum on Twitter
 Support this forum, shop at newmodeus.com
 Support the forum, shop at newmodeus.com
System backups occur about 7:00 am EDT and last about 10 minutes. This will slow performance. RSS feeds have been added to the forum.
Donate if you wish to:
bill at thinkpads dot com

It is currently Wed Apr 23, 2014 7:42 am

All times are UTC - 5 hours




Post new topic Reply to topic  [ 10 posts ] 
Author Message
PostPosted: Sat May 15, 2004 6:36 pm 
Offline
Sophomore Member

Joined: Mon May 10, 2004 7:17 pm
Posts: 155
Location: Toronto, ON
Am I right to assume that only the USB port on the left side of the X40 is powered (ignoring the proprietary IBM power connector underneath it)? Does anyone know if it supplies only the minimum 100 mA of the USB 2.0 spec, or can it meet the 500 mA burst requirements of some devices?

_________________
- Brian
2004: 2371-8EU X40, 1.2 GHz Pentium M, 1 GB, 40 GB, 802.11b/g, 2 x 8-cell
2007: 2623-DDU T60p, 2.0 GHz T2500, 2 GB, 200GB 7200 rpm, 802.11a/b/g, BT, 3 x 9-cell, 15" UXGA FlexView, Adv Mini Dock
2011: 4286-CTO X220, 2.5 GHz i5-2520M, 8 GB, 60GB SSD, 250GB HD


Top
 Profile  
 
 Post subject:
PostPosted: Sat May 15, 2004 7:48 pm 
Offline
Senior Member
Senior Member

Joined: Tue Apr 27, 2004 4:45 pm
Posts: 579
Location: Michigan, USA
Both USB 2.0 ports are powered. Don't know the exact power rating but both ports power an external bus-powered USB 2.0 hard drive with no problems. The auxillary power port is just for the IBM USB 2.0 Multi-Burner.

_________________
Thinkpad X200s w/ Ultrabase
C2D SL9600 / 8GB / 160GB X25-M G2 / BD MULTI / 12.1" WXGA / INTEL 4500MHD / INTEL 5150 / BT / AT&T WWAN / W7


Top
 Profile  
 
 Post subject:
PostPosted: Sat May 15, 2004 8:58 pm 
Offline
Sophomore Member

Joined: Mon May 10, 2004 7:17 pm
Posts: 155
Location: Toronto, ON
Alright, thanks. I looked through the May 2004 Thinkpad PSR, and the exact wording is "Two USB (version 2.0), plus one powered USB port for select IBM options"... of course, that makes it sound like there are three USB ports in total on the X40. :? I looked for the X40 HMM, but it only appears to be available in Japanese at the moment...

_________________
- Brian
2004: 2371-8EU X40, 1.2 GHz Pentium M, 1 GB, 40 GB, 802.11b/g, 2 x 8-cell
2007: 2623-DDU T60p, 2.0 GHz T2500, 2 GB, 200GB 7200 rpm, 802.11a/b/g, BT, 3 x 9-cell, 15" UXGA FlexView, Adv Mini Dock
2011: 4286-CTO X220, 2.5 GHz i5-2520M, 8 GB, 60GB SSD, 250GB HD


Top
 Profile  
 
 Post subject:
PostPosted: Sun May 16, 2004 8:10 am 
Offline
Senior Member
Senior Member

Joined: Tue Apr 27, 2004 4:45 pm
Posts: 579
Location: Michigan, USA
Here's the Hardware Maintenance Manual (in English):

http://www-306.ibm.com/pc/support/site. ... MIGR-53683

Even more confusing is that when you attach the X40 to the X4 Ultrabase, the left powered USB 2.0 port and the auxillary power port are inaccessible (part of the X4 blocks both ports), but you gain 3 additional powered USB 2.0 ports on the back of the X4 for a total of 4 powered USB 2.0 ports. All the rear X4 USB 2.0 ports also work fine with bus-powered hard drives.

_________________
Thinkpad X200s w/ Ultrabase
C2D SL9600 / 8GB / 160GB X25-M G2 / BD MULTI / 12.1" WXGA / INTEL 4500MHD / INTEL 5150 / BT / AT&T WWAN / W7


Top
 Profile  
 
 Post subject:
PostPosted: Sun May 16, 2004 11:06 am 
Offline
Sophomore Member

Joined: Mon May 10, 2004 7:17 pm
Posts: 155
Location: Toronto, ON
csv96,

Thanks for the link to the English HMM... I searched for both "X40" and "Thinkpad Hardware Maintenance Manual" on the IBM publications site, but neither turned up this document. :x How does one locate documents like these (like if I wanted the T42p HMM)?

_________________
- Brian
2004: 2371-8EU X40, 1.2 GHz Pentium M, 1 GB, 40 GB, 802.11b/g, 2 x 8-cell
2007: 2623-DDU T60p, 2.0 GHz T2500, 2 GB, 200GB 7200 rpm, 802.11a/b/g, BT, 3 x 9-cell, 15" UXGA FlexView, Adv Mini Dock
2011: 4286-CTO X220, 2.5 GHz i5-2520M, 8 GB, 60GB SSD, 250GB HD


Top
 Profile  
 
 Post subject:
PostPosted: Sun May 16, 2004 11:08 am 
Offline
Sophomore Member

Joined: Mon May 10, 2004 7:17 pm
Posts: 155
Location: Toronto, ON
Wait, I think I just answered my own question. The solution is not to use IBM's search page, but thinkpads.com's and look for posts from you. ;)

http://www-307.ibm.com/pc/support/site. ... MIGR-46464

_________________
- Brian
2004: 2371-8EU X40, 1.2 GHz Pentium M, 1 GB, 40 GB, 802.11b/g, 2 x 8-cell
2007: 2623-DDU T60p, 2.0 GHz T2500, 2 GB, 200GB 7200 rpm, 802.11a/b/g, BT, 3 x 9-cell, 15" UXGA FlexView, Adv Mini Dock
2011: 4286-CTO X220, 2.5 GHz i5-2520M, 8 GB, 60GB SSD, 250GB HD


Top
 Profile  
 
 Post subject:
PostPosted: Sun May 16, 2004 10:48 pm 
Offline
Senior Member
Senior Member

Joined: Tue Apr 27, 2004 4:45 pm
Posts: 579
Location: Michigan, USA
You're welcome. The way I find the HMM is to go to IBM.com, click support, click online publications, and then select the model I'm looking for.

_________________
Thinkpad X200s w/ Ultrabase
C2D SL9600 / 8GB / 160GB X25-M G2 / BD MULTI / 12.1" WXGA / INTEL 4500MHD / INTEL 5150 / BT / AT&T WWAN / W7


Top
 Profile  
 
 Post subject:
PostPosted: Thu May 27, 2004 12:31 am 
Offline
Senior Member
Senior Member

Joined: Tue Apr 27, 2004 4:45 pm
Posts: 579
Location: Michigan, USA
New Update (and a bit of a warning):

I have an IBM/Hitachi Travelstar 80gb 5400rpm drive mounted in an external bus-powered USB 2.0 enclosure. Lately I've been burning CD's at 24x speed from this external drive. It appears that the three expansion USB 2.0 ports on the X4 Ultrabase may be too underpowered to sustain constant data transfer from the bus-powered external drive. At least once or twice per burn, the drive will click loudly and then pause for several seconds. Occasionally there will even be a buffer underrun occurence.

However, if I plug the external hard drive directly into the native USB 2.0 port on the X40 itself, there are no problems. No pauses or clicking.

So it seems that the three expansion USB 2.0 ports on the X4 should probably only be used for keyboard, mouse, printer, card reader, etc.,

_________________
Thinkpad X200s w/ Ultrabase
C2D SL9600 / 8GB / 160GB X25-M G2 / BD MULTI / 12.1" WXGA / INTEL 4500MHD / INTEL 5150 / BT / AT&T WWAN / W7


Top
 Profile  
 
PostPosted: Thu May 27, 2004 4:52 am 
Offline
Junior Member
Junior Member

Joined: Sun Apr 25, 2004 6:30 pm
Posts: 317
Location: Santa Monica, CA
taob wrote:
Am I right to assume that only the USB port on the left side of the X40 is powered (ignoring the proprietary IBM power connector underneath it)? Does anyone know if it supplies only the minimum 100 mA of the USB 2.0 spec, or can it meet the 500 mA burst requirements of some devices?


All of the T40's ports meet the 500mA. I can't imagine IBM skimping out on the X40-- but I'll have one soon enough to check.


Top
 Profile  
 
 Post subject:
PostPosted: Thu May 27, 2004 10:26 am 
Offline
Senior Member
Senior Member

Joined: Tue Apr 27, 2004 4:45 pm
Posts: 579
Location: Michigan, USA
If the X4 acts as a hub, does that mean it's 500mA split 3 ways?

_________________
Thinkpad X200s w/ Ultrabase
C2D SL9600 / 8GB / 160GB X25-M G2 / BD MULTI / 12.1" WXGA / INTEL 4500MHD / INTEL 5150 / BT / AT&T WWAN / W7


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 10 posts ] 

All times are UTC - 5 hours


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group