Hello,
I read Computer does not boot with My Book connected
and tried this (just formatting the disk in NTFS) without touching the BIOS and my WD is still preventing windows from starting with a “no bootable device found” message.
If the pc is on, it’s not a problem to plug it in.
The BIOS example on the site is different from mine (DELL XPS8900), so I don’t know how to change my BIOS options?
Who can help me?
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Patrick (Belgium)
You have to enter the BIOS setup and change the boot order of your devices. Placing the My Book or USB devices (depending on the BIOS setup) after your internal hard drive will prevent the computer from trying to boot off of the My Book.
Also, make sure that the partition(s) on your My Book isn’t marked as active, as that will cause the BIOS to attempt to boot off of it. Normally if the drive isn’t marked as active and contains no bootable files, then the BIOS should not display the “no bootable device found” while the My Book is connected and should skip right over it and attempt to boot off of another device, normally your internal hard drive.
Thank you 
I understand that the WD is trying to boot and as it is not the boot disk, it crashes.
My problem now is whether I can change my BIOS from the current UEFI to LEGACY which would allow me, I think, to then choose the SSD (C:) first.
I have seen screenshots and youtube videos but their BIOS is different from mine and I don’t see the LEGACY/UEFI choice.
That said, 2 things:
1 - my WD 10TB is working and I have 55,000 photos in it that I don’t want to lose (it is formatted in NTFS as recommended by WD)
2 - if I change the only partition of this 10TB to non-active, isn’t there a danger for my data?
Thanks
ps: ideally, I would like to have images of another DELL 8900 for the 2 or 3 BIOS menus concerned ô_ô
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I wouldn’t change the BIOS form UEFI to legacy as that may prevent Windows from booting.
You can check the active status of your My Book by going to disk management. If the partition for your My Book doesn’t say active, then you’re good. Changing the active status does not erase or format the partition-it’s only a “flag”. However, it’s always a good idea to backup your data prior to making changes in disk management or another disk utility program.
If your My Book is still using the factory formatted NTFS file system or it has been reformatted at some point, either through Windows or a WD program, I don’t see either one of them marking the partition as active. If the My Book was used as a boot drive at some point, either manually created or with the use of a program, it’s possible that the active status maybe be retained, even after formatting.
I think the best option would be to change the boot order as previously mentioned so that your internal storage device starts booting into Windows before the BIOS can access the My Book. You may, however, need to change the boot order back should you need to boot off of a USB storage device, or alternately use the BIOS’ boot menu and make a selection from there.
Ok I will test this Thursday or Friday, maybe I could also send you a picture of my BIOS main options (PRINT SCREEN obviously not possible)?
If so I will give you here my email here and you can write to me so that I send it privately.
Thank you already for the explanations 0_0
To fix Boot Device Not Found error, you can try the below methods:
- Perform Hard Reset
- Reset BIOS default settings
- Reset Hard Drive
Hope it helps!
Hello,
This is perhaps a radical solution, no?
I don’t want to lose my data or the boot disk.
I put here all the pictures or screenshots I could make, it might help me.
