Seagate STEA2000400 Guide d'installation

My second external drive isn't detected in

Windows

Sometimes only one of two external (ie, GoFlex, Backup Plus) drives mounts with a drive letter

when connected to Windows. This article explains.

Sometimes only one of two external (ie, GoFlex, Backup Plus) drives mounts with a drive letter

when connected to Windows.

This is caused if two drives have the same drive signature, which can occur when drives are

setup in a mass production environment or when they are cloned.

The issue can be quickly fixed by forcing the drive on-line. To force a drive online in Windows:

1. Press Windows key ( ) + R.

2. In the run box type diskmgmt.msc

3. On the right, scroll down so you can see your external drives.

4. You will notice that the 1st external drive is Online.

5. You will notice that the other external drive is Offline.

6. Right-click on Offline (in the grey area of the box) and choose Online from the menu.

The drive should show in Computer (Window Explorer) in a few seconds.

Why won't my 3TB or 4TB external drive

work with Microsoft Image Backup in

Windows 7?

Microsoft Image Backup in Windows 7 will not support any Seagate Backup Plus, 3TB or

4TB GoFlex drives and the older model Expansion Portable And Desktop drives (along

with most other external drives above 2.1TB). This article explains.Windows Image Backup

in Windows 7 will not support any Seagate Backup Plus drives, GoFlex drives that exceed 2.1TB

(3TB and 4TB models), or older model Expansion Portable and Desktop

drives (along with most other external drives that exceed 2.1TB in size).

Microsoft only supports drives that are set up to use 512 byte blocks as destinations for image

backups. The drives listed above are compatible with all other Windows functionalities.

To allow 3TB and 4TB drives to work in older operating systems such as Windows XP, these

drives are configured using 4K byte blocks. Microsoft has added support for 4K drives in

Windows 8. See here for more information.

For Backup Plus and GoFlex drives, the bundled software will allow you to back up your data.

As an alternative to Windows image backups for Backup Plus drives, GoFlex drives, and older

model Expansion drives, consider using DiscWizard.

Computer won't boot with USB drive

connected

Issues booting while a USB drive is connected is usually the result of a USB Device option being

enabled in the System BIOS' Boot Order or Boot Sequence.

Some of these steps require accessing the system’s BIOS. Please refer to the system or

motherboard manufacturer’s documentation for access and configuring options.

Here are some steps to try and resolve the issue:

Check to see if the active flag is set to active on the partition. If it is then remove the

active flag using these instructions.

Check the format of the drive. Some Seagate drives ship as exFAT for Window and Mac

compatibility. For some systems this may present issues. If using on Windows only, then

format the drive to NTFS. See how to format your drive here. If using exFAT is required,

try one of the other options listed.

Disable Boot from USB devices in the BIOS

Note: Verbiage will vary from system to system

Disable USB Legacy Support in the BIOS

Note: If you are using a USB mouse or Keyboard disabling legacy support may result

in those devices not functioning in Real mode (MS-DOS) or Safe Mode.

Here are two Microsoft links that cover Disabling USB Legacy support

oComputer Hangs During Shutdown with USB Legacy Support Enabled in the

BIOS

oUSB Keyboard or Mouse May Not Work After You Restart Your Computer in

MS-DOS Mode

Some System BIOS' may not include the ability to disable USB devices from the Boot

Order/Boot Sequence. If this is the case, it is recommended that you disconnect the USB

External Drive from your system until the system’s operating system has fully booted; at which

time you can connect the USB Drive to your system.

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references third parties and third party products as an informational service only, it is not an

endorsement or recommendation - implied or otherwise - of any of the listed companies. Seagate

makes no warranty - implied or otherwise - regarding the performance or reliability of these

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control of Seagate; therefore, Seagate accepts no responsibility for and disclaims any liability

from the actions or products of the listed companies. You should make your own independent

evaluation before conducting business with any company. To obtain product specifications and

warranty information, please contact the respective vendor directly. There are links in this

document that will permit you to connect to third-party web sites over which Seagate has no

control. These links are provided for your convenience only and your use of them is at your own

risk. Seagate makes no representations whatsoever about the content of any of these websites.

Seagate does not endorse or accept any responsibility for the content, or use of any such

websites.

Newer model Expansion portable and Expansion desktop drives are

compatible with Windows image backup.

For more information about the limitations of Windows Backup and Restore, please

contact Microsoft.

Drive reports 'write protected' or 'read only'

when trying to save to or delete from it

Discusses what to do if an external reports "Write Protected" when trying to save files onto it or

delete files from it.

A drive can sometimes report "Write Protected" when trying to save files onto it or delete files

from it.

This typically means that you have connected an external drive that is formatted with an NTFS

partition to a Mac computer. MacOS cannot write to NTFS partitions and so will often indicate

the drive is write-protected.

Seagate GoFlex and GoFlex for Mac drives include an NTFS driver that can make the drives

intercompatible between Mac and Windows, so that may be a good solution.

See Document ID: 214531 for more information.

For all other drives, please see Document ID: 207851 for instructions on reformatting the drive

in MacOS.

Reformatting the drive will ERASE ALL DATA on the drive. Please note that

Windows partitions (ie, NTFS partitions) and MacOS partitions are not easily compatible at this

time without special software, so using an external drive to transfer data between a Windows

computer and a MacOS computer can be difficult and sometimes dangerous to your data.

Windows 7 or Vista requests drivers for an

external drive



Troubleshooting when external drives encounter driver and ʺUnknown Deviceʺ problems in

Windows 7/Vista Device Manager.

Windows 7 or Vista sometimes encounters problems locating the drivers necessary for the proper

function of external hard drives.

When that happens, it may alert you that drivers were not loaded correctly. These drivers are part

of its own Windows registry.

First, update Windows Vista to Service Pack 1.

If this does not resolve the problem and the drivers do not now load automatically, you may

simply point Windows 7 or Vista to its own drivers manually.

From Vista:

1. Right-click on Computer.

2. Choose Manage.

3. Choose Device Manager.

Here is the relevant graphic for Vista's Device Manager:

(Click to expand image.)

Here is the procedure to load the drivers manually:

Troubleshooting GPT Protective Partition

Issues

Sometimes, after connecting an internal or external hard drive to your system, Windows Disk

Management says that it is prepared with a GPT Protective Partition. This will mean that you

cannot repartition or reformat the drive. This article will discuss how to overcome this issue.

What is a GPT disk?

The GUID Partition Table (GPT) was introduced as part of the Extensible Firmware Interface

(EFI) initiative. GPT provides a more flexible mechanism for partitioning disks than the older

Master Boot Record (MBR) partitioning scheme that has been common to PCs.

A partition is a contiguous space of storage on a physical or logical disk that functions as though

it were a physically separate disk. Partitions are seen by the system firmware and the installed

operating systems. Access to a partition is controlled by the system firmware before the system

boots the operating system, and then by the operating system after it starts.

The GUID Partition Table (GPT) Scheme was implemented under Microsoft Windows XP x64

edition, Windows Server 2003 (64-bit), Windows Server 2003 SP1 (all versions), Windows

Vista, Windows 7+

In a nutshell, GPT Partition was developed to get around known, MBR partition size issues; the

maximum size for a MBR partiton is 2 Terabytes (TB). GPT partitions enable this limit to be

exceeded.

Note: For more comprehensive information on GPT Protective Partitions, refer to the following

Microsoft link:

https://docs.microsoft.com/en-us/windows-hardware/manufacture/desktop/windows-and-gpt-faq

GUID Partition Table (GPT) partitions are also found in Mac OS X versions 10.4.6 and newer.

All Intel-based Macs require a GPT partition on a boot volume, whether it be internal or external.

When connecting an internal and/or and external hard drive to a Windows XP (or newer), 32-bit

operating system, you may find your drive is inaccessible and that Disk Management reports that

the drive has a GPT Protective Partition on it. The drive cannot be repartitioned and formatted in

this state. This is because the internal or external hard disk was previously prepared on either a

Windows or Macintosh computer with a GPT partition.

Normal Disk Management facilities will not overcome this issue. To prepare this drive, you will

need to use the Windows diskpart command-line utility. The following procedure provides the

steps for cleaning a GPT Protective Partition from a hard disk drive connected to an existing

Windows XP (or newer), 32-bit Operating System.

This is a data destructive process. This procedure not only removes the drive's partition,

but also removes the Drive Signature. It is highly recommended that you backup any/all critical

data on the drive before proceeding.

You must open Disk Management and document the Disk Number of the drive

containing the GPT Protective partition, as you will need this information later in the procedure.

1. Determine the disknumber assigned to the GPT-protected drive.

1. Right-click on (My) Computer.

2. Choose Manage.

3. Select Disk Management (listed under Storage).

4. Look for the drive that is identified as GPT and note the Disk number (such as

Disk 1).

2. Open a Command Window. From the command prompt, type diskpart and press Enter.

The diskpart prompt will open.

3. From the diskpart prompt, type list disk and press Enter. A list of disks will appear in a

text format. You will return to the diskpart prompt.

4. From the diskpart prompt, type select disk disknumber (for instance, if the disk

containing the GPT Protective Partition is Disk 2, you would type select disk 2)and press

Enter. A message appears saying that the disk is selected. You will return to the diskpart

prompt.

5. From the diskpart prompt, type clean and press Enter. At this point the drive's partition

and signature a removed. You will return to the diskpart prompt.

6. From the diskpart prompt, type exit and press Enter. Type exit once more to close the

Command Window. At this point, the internal and/or external drive can be re-initialised,

partitioned and formatted.

7. Launch Disk Management, and to initialise the disk:

oUse the Initialise and Convert Disk Wizard...

-OR-

oClose the Wizard, right-click on the disk in question and select Initialize Disk

from the drop-down menu.

8. Once the drive is initialised, continue using Disk Management to partition and format the

drive.

REFERENCE TO THIRD PARTIES AND THIRD PARTY WEB SITES. Seagate