Tera byte drives

  • Thread starter Thread starter Mario
  • Start date Start date
M

Mario

Hi,
I attached a 1.5 terabyte drive to my system and all is well.
I attached a second 1.5 terabyte drive and the system won't boot
unless I disconnect the second terabyte drive.

Does it mean I need to change something in the bios or do I need to upgrade
the bios?
I'm running a new gigabyte mobo.

TIA.
 
Did you set the jumpers as a Slave on the second one? Why on earth would you need 2
of those drives? It is asking for problems Ever heard of a back up media???

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Mario said:
I attached a 1.5 terabyte drive to my system and all is well.
I attached a second 1.5 terabyte drive and the system won't boot
unless I disconnect the second terabyte drive.

Does it mean I need to change something in the bios or do I need to upgrade
the bios?
I'm running a new gigabyte mobo.
Click to expand...

Oh, "connected" is supposed to tell us how you actually connected.
"Won't boot". Oh yeah, that is very detailed.

So just HOW did you connect the 2nd hard disk? To where did you connect
it? IDE, SATA, SCSI, what? Maybe you hooked them up wrong. WHERE do
these drives get their power? Maybe you have added to many components
sucking power that the PSU is too weak to supply.

And just what does "won't boot" means? Do you hear any beeps? Do you
see the POST screen? Does Windows start to load and then do something
unwanted, like hang?


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Sorry for the blurry post.
I have a WD 1.5 terabyte drive. Connects with a USB cable.
This drive works fine and has no adverse effect on my system.

I have a second Identical USB drive, also connected via the USB cable.

With the first drive connected via USB the system boots just Fine.
With the second drive also connect Via USB the system won't boot up
unless I disconnect (pull the usb plug) on the drive.

What happens is the system loops to the bios flash screen over and over.
When I remove the second drive the system boots as normal.

Better?

Mario
..
 
Mario said:
I have a WD 1.5 terabyte drive. Connects with a USB cable.
This drive works fine and has no adverse effect on my system.

I have a second Identical USB drive, also connected via the USB cable.

With the first drive connected via USB the system boots just Fine.
With the second drive also connect Via USB the system won't boot up
unless I disconnect (pull the usb plug) on the drive.

What happens is the system loops to the bios flash screen over and over.
When I remove the second drive the system boots as normal.
Click to expand...

Are you using the same paired set of USB ports for both external USB
hard drives? That is, are both external USB hard drives attached to USB
ports that share the same USB controller?

Each USB controllers will manage 2 USB ports. That's why you see the
USB ports show up in pairs. The maximum current draw from the
controller is 0.5 amperes (or 500 milliamps). That means there can be a
maximum combined draw of 0.5A across the *pair* of USB ports.

Some USB drives are unpowered. That is, they do not have their own
power adapter (internally in the case or as a "brick" that is inline or
at the end of their power cord). Because they are "USB powered"
external devices, they draw their power from the USB port. You cannot
exceed a combined current draw of 0.5A across a pair of USB ports.

Check the specifications on these external hard drives if they are USB-
powered devices (they have no separate power cord). If their combined
current draw is over 0.5A then you have to connect them to a USB ports
that are not paired (so the current draw is taken from different USB
controllers). If the USB-powered hard drives together suck more than
0.5A and you have no more USB ports so you can put them on different
paired USB ports then you have to get a self-powered USB hub to which
you connect them. Each port on a self-powered USB hub can supply its
own 0.5A max current draw.

Did you build these external USB drives (i.e., get a USB case and stick
in a hard disk)? Or did you purchase them already pre-built? If
pre-built, what brand and model are they? What does their spec say
regarding their maximum current draw (for each one separately)?

If the external USB hard disks are self-powered or if they are USB-
powered but together draw less than 0.5A or are different pairs of USB
ports (and each draws less than 0.5A along with any other USB devices on
the same shared USB ports) then see if your BIOS is configured to boot
from a USB device. If so, change the "boot drive order" option in the
BIOS to *not* include a USB device, or move the USB device to a lower
ordered boot device.
 
Sorry for the blurry post.
I have a WD 1.5 terabyte drive. Connects with a USB cable.
This drive works fine and has no adverse effect on my system.

I have a second Identical USB drive, also connected via the USB cable.

With the first drive connected via USB the system boots just Fine.
With the second drive also connect Via USB the system won't boot up
unless I disconnect (pull the usb plug) on the drive.

What happens is the system loops to the bios flash screen over and over.
When I remove the second drive the system boots as normal.

Better?

Mario
.
Click to expand...

USB devices can stop a boot if they aren't connected properly, or if
they have a problem in the electronics. What you should first do is keep
the second drive disconnected and connect it only after you've finished
booting. If the system goes haywire at that point then you know you have
a bad drive.

Yousuf Khan
 
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