A small GoFlex USB external HD annoyance

[Shadow]

I have a ST1000LM024 silver "Seagate" external USB 3.0 drive,
which I plug in once or twice a day for backups.
On every laptop I've ever plugged it into (linux, win XP, win
7), when I eject it, it powers off.
On my desktop, it "disconnects", but does not power off when I
eject it. Running Win XP/Debian Wheezy, so I just accepted that as
some hardware problem, OS independent.
Yesterday, I discovered that if I eject a pendrive from the
port, and immediately plug in my Seagate, it powers off normally. If I
wait an hour or so before plugging it in, it will no longer power off.
I hate handling the drive while it's still spinning (I can
feel it spinning after eject).
How can I debug what makes it power off normally only if I
plugin and eject a pendrive first ?
TIA
PS All ports are USB 2.0, Kingston pendrives DO NOT help, but
SanDisk and another generic makes do. When I eject a Kingston drive,
the drive letter disappears from explorer, with the other pendrives
the letter remains. Probably a clue somewhere in that.

 

[Shadow]

This is just a "bump"

I have a ST1000LM024 silver "Seagate" external USB 3.0 drive,
which I plug in once or twice a day for backups.
On every laptop I've ever plugged it into (linux, win XP, win
7), when I eject it, it powers off.
On my desktop, it "disconnects", but does not power off when I
eject it. Running Win XP/Debian Wheezy, so I just accepted that as
some hardware problem, OS independent.
Yesterday, I discovered that if I eject a pendrive from the
port, and immediately plug in my Seagate, it powers off normally. If I
wait an hour or so before plugging it in, it will no longer power off.
I hate handling the drive while it's still spinning (I can
feel it spinning after eject).
How can I debug what makes it power off normally only if I
plugin and eject a pendrive first ?
TIA
PS All ports are USB 2.0, Kingston pendrives DO NOT help, but
SanDisk and another generic makes do. When I eject a Kingston drive,
the drive letter disappears from explorer, with the other pendrives
the letter remains. Probably a clue somewhere in that.

 

[Mr. Man-wai Chang]

I guess his/her computer's USB 2.0 port just couldn't provide sufficient
power for the hard disk.

USB 2.0 gives you 500mA (current); USB 3.0, 700mA!

This is just a "bump"

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[Shadow]

I guess his/her computer's USB 2.0 port just couldn't provide sufficient
power for the hard disk.

USB 2.0 gives you 500mA (current); USB 3.0, 700mA!

I'm a "he", and it's my computer. Why would my PC successfully
power-off the USB HD if a pendrive of certain makes is inserted and
ejected from the port first ?
It makes no sense at all. How much power would I need to
power-off a drive ? I would assume less than it takes to power-on said
drive.
(please read full post)
[]'s

 

[Mr. Man-wai Chang]

It makes no sense at all. How much power would I need to
power-off a drive ? I would assume less than it takes to power-on said
drive.

A spinning hard disk has a motor and it uses a lot more electricity than
a chip-based flash drive.

--
@~@ Remain silent. Nothing from soldiers and magicians is real!
/ v \ Simplicity is Beauty! May the Force and farces be with you!
/( _ )\ (Fedora 19 i686) Linux 3.11.9-200.fc19.i686
^ ^ 17:06:02 up 4 days 16:01 0 users load average: 0.08 0.04 0.05
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http://www.swd.gov.hk/tc/index/site_pubsvc/page_socsecu/sub_addressesa

 

[Shadow]

A spinning hard disk has a motor and it uses a lot more electricity than
a chip-based flash drive.

Yes, and mine works just fine. But I can only make it power
off if I insert a pendrive into the port, eject the pendrive, and
quickly plug in my USB hard drive. It will the correctly power off. If
I do NOT insert a pendrive first, it will not power off.
Question is simple.
Why ?
[]'s