Missing Operating System

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vpro

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Hello

This is my first post on the forum so excuse me if i make any mistakes :)

Last night, i let my PC on to run a disk defragment and when i woke up i realized that it was crashed, my monitor was on but i couldn't see anything on the screen so i restarted the PC.

Then i got the error Missing Operating System.
I accessed the BIOS and i noticed that the Primary IDE Master/Slave were not detected.
Then i inserted the Windows 7 disk to perform a repair and it didn't detect any operating systems. I clicked on Load Drivers but i couldn't access any of the drivers and it asked me to perform a format.

I've also attached some pictures of the screen to help you understand the problem.

Any help appreciated.

Thanks
 

My Computer

Computer Manufacturer/Model Number
Custom
OS
Windows 7 64 bit
CPU
AMD Phenom(tm) II X4 555 Processor
Motherboard
ASUS M4A785TD-V EVO
Memory
8192 MB (DDR3 SDRAM)
Graphics Card(s)
ATI Radeon HD 5770 (1024 MB) (x2)
Monitor(s) Displays
LG W2443 24'
Screen Resolution
1920x1080
Hard Drives
WDC WD6401AALS-00L3B2 ATA Device (596 GB, IDE)
WDC WD6401AALS-00L3B2 ATA Device (596 GB, IDE)
PSU
Inter-Tech FP 750W
Case
Smilodon RaidMax
Cooling
H70 corsair
Welcome vpro :)

It looks like disk defrag may have wiped your bootable OS. It looks like your bios only shows you have 2 SATA HD connected to the MB. If you do not have any IDE HDs, that is why Primary Master/Slave were not detected. Normally the Bootable SATA HD should be on the first SATA connection on the MB. Your 5th pic, in the background says (4) Hard Disk Drives ? Could you please give a few more details of your hardware specs ? How much data & programs were on your Boot HD ?

I have had a long 16 hour work day, already so I don't want to advise you what do do yet without more info & hopefully some more of our Guru members will see your thread also.
 

My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
Built them myself, Science Experiments !
OS
Win7 Enterprise, Win7 x86 (Ult 7600), Win7 x64 Ult 7600, TechNet RTM on AMD x64 (2.8Ghz)
CPU
AMD fx8350 4ghz, AMD-32 2400mhz, AMD-64 3200mhz, AMDx64 2.8G
Motherboard
SIS 755, ECS-K8M890M-M (Ult 7600), GigaByte & others
Memory
2gb, 4gb on the Ult 7600, 4gb on Technet RTM, 32gb on FX8350
Graphics Card(s)
Draw my own Graphics, several nVidia cards
Sound Card
on motherboard
Monitor(s) Displays
19" flat scr, 28" I-Inc widescr,22" Emprex Widescr, 23" Acer
Screen Resolution
1280 x 1024, 1440 x 900, 1920 x 1080
Hard Drives
6 pata Ide HD's & 2 Sata HD's
added 80gb external on Ult 7600 computer,
numerous extra 1tb, 2TB, 3Tb SATA HD's
A collection of ext HD Docks w/ HDs
PSU
430w, 550w, 600w, 700, 800, etc
Case
All Generic Full Towers
Cooling
Open Air & a few fans, some w/ colored LEDs
Keyboard
Compaq & Dell recycled from GoodWill
Mouse
Made in China Optical Wired Mouse
Internet Speed
Fast Cable InterNet
Antivirus
AVG Free on 24 different Desktops, NO Problems!
Browser
IE 8 is preferred, but use FireFox sometimes
Other Info
Linksys Routers, switches, & Hubs
Too Many USB Flash Drives to count, Biggest is 64GB !
Eight computers in my home network.
Sixteen computers at my business network.
Linked via TeamViewer !
Lots of old used spare computer parts everywhere!
I thing disc defrag may have come across an error whilst running, it could be worth running a hard drive test that are in most BIOS's as it may indicate a damaged sector or similar.

Also it may be worth trying to recover the data from your HDD, maybe using an application such as recuva.

One more idea could be using a linux ubuntu bootable disc so that you can access the file system and have a look whats on the HDD that way.
 

My Computer

OS
Windows 7 Home Premium (64bit)
CPU
AMD Phenom II X4 965e @ 4000MHz
Motherboard
Gigabyte GA-870A-UD3
Memory
4096MB DDR3-SDRAM
Graphics Card(s)
Nvidia GTX 560 Ti
Sound Card
N/A
Monitor(s) Displays
1x 32" LCD, 1x 24" LED, 1x 19" LED
Screen Resolution
1920*1080
Hard Drives
1x 1TB system drive
2x 2TB storage drive
PSU
850w modular
Case
NZXT Phantom Red
Cooling
Liquid Cooling
Internet Speed
5.0Mb
DocBrown said:
Welcome vpro :)

It looks like disk defrag may have wiped your bootable OS. It looks like your bios only shows you have 2 SATA HD connected to the MB. If you do not have any IDE HDs, that is why Primary Master/Slave were not detected. Normally the Bootable SATA HD should be on the first SATA connection on the MB. Your 5th pic, in the background says (4) Hard Disk Drives ? Could you please give a few more details of your hardware specs ? How much data & programs were on your Boot HD ?

I have had a long 16 hour work day, already so I don't want to advise you what do do yet without more info & hopefully some more of our Guru members will see your thread also.
Click to expand...

Hello and thanks for your help.

I have 2x Western Digital Caviar Black WD6401AALS 640GB 7200 RPM 32MB Cache SATA.

The 4 Hard Disk Drives are:
1)Local Disk(C: )
2)Local Disk(D: )
3)Local Disk(E: )
4)Boot(X: )

I tried to reboot my PC few minutes ago and i got a BSOD when i tried to boot from my Windows 7 disc :S
IRQL NOT LESS OR EQUAL
Then i restarted my PC and tried again and it booted fine from the Windows 7 disc.

I added new pictures below.







 

My Computer

Computer Manufacturer/Model Number
Custom
OS
Windows 7 64 bit
CPU
AMD Phenom(tm) II X4 555 Processor
Motherboard
ASUS M4A785TD-V EVO
Memory
8192 MB (DDR3 SDRAM)
Graphics Card(s)
ATI Radeon HD 5770 (1024 MB) (x2)
Monitor(s) Displays
LG W2443 24'
Screen Resolution
1920x1080
Hard Drives
WDC WD6401AALS-00L3B2 ATA Device (596 GB, IDE)
WDC WD6401AALS-00L3B2 ATA Device (596 GB, IDE)
PSU
Inter-Tech FP 750W
Case
Smilodon RaidMax
Cooling
H70 corsair
I'm intrigued as to what's happened to your boot partition.

On a clean install Windows 7 will create a boot partition of 100Mb as the first partition on Drive C, yet yours shows as 33Mb on Drive X.

Check what's showing in Disk Management rather than Windows Explorer and see which partition(s) are marked as active. Although I'm no expert there seems to be something badly amiss here.

My Disk Management layout:

View attachment 156632
 
Last edited:

My Computer

Computer Manufacturer/Model Number
HP Pavilion Elite 495UK
OS
Windows 7 Ultimate SP1 64-Bit
CPU
Intel Core i7 870 @ 2.93GHz
Motherboard
MSI 2A9C (CPU1)
Memory
8Gb Dual-Channel DDR3 @ 664MHz
Graphics Card(s)
nVidia GeForce GTX 460 1024MB dedicated RAM
Sound Card
Realtek HD Audio
Monitor(s) Displays
HP2310i
Screen Resolution
1920 x 1080
Hard Drives
1x1954GB Hitachi HDS22020ALA 330 (RAID), 1x1954GB Hitachi External for backup and storage
PSU
460W
Case
HP Elite
Cooling
Air cooled
Keyboard
Logitech K750 solar-powered keyboard
Mouse
Logitech Wireless M180 mouse
Internet Speed
2Mb
Other Info
Pure Avanti Flow Internet Radio with iPod Dock, 64Gb iPod, HP USB Speakers, Sony MDR-V500 Headphones, Sony Vaio F-Series Laptop
seavixen32 said:
I'm intrigued as to what's happened to your boot partition.

On a clean install Windows 7 will create a boot partition of 100Mb as the first partition on Drive C, yet yours shows as 33Mb on Drive X.

Check what's showing in Disk Management rather than Windows Explorer and see which partition(s) are marked as active. Although I'm no expert there seems to be something badly amiss here.

My Disk Management layout:

View attachment 156632
Click to expand...

Drive X, is the ram drive
 

My Computer

OS
ME/XP/Vista/Win7
theog said:
seavixen32 said:
I'm intrigued as to what's happened to your boot partition.

On a clean install Windows 7 will create a boot partition of 100Mb as the first partition on Drive C, yet yours shows as 33Mb on Drive X.

Check what's showing in Disk Management rather than Windows Explorer and see which partition(s) are marked as active. Although I'm no expert there seems to be something badly amiss here.

My Disk Management layout:

View attachment 156632
Click to expand...

Drive X, is the ram drive
Click to expand...

Thanks for that, I didn't know.

I'm not sure what a RAM drive does, but I'm assuming it speeds things up?
 

My Computer

Computer Manufacturer/Model Number
HP Pavilion Elite 495UK
OS
Windows 7 Ultimate SP1 64-Bit
CPU
Intel Core i7 870 @ 2.93GHz
Motherboard
MSI 2A9C (CPU1)
Memory
8Gb Dual-Channel DDR3 @ 664MHz
Graphics Card(s)
nVidia GeForce GTX 460 1024MB dedicated RAM
Sound Card
Realtek HD Audio
Monitor(s) Displays
HP2310i
Screen Resolution
1920 x 1080
Hard Drives
1x1954GB Hitachi HDS22020ALA 330 (RAID), 1x1954GB Hitachi External for backup and storage
PSU
460W
Case
HP Elite
Cooling
Air cooled
Keyboard
Logitech K750 solar-powered keyboard
Mouse
Logitech Wireless M180 mouse
Internet Speed
2Mb
Other Info
Pure Avanti Flow Internet Radio with iPod Dock, 64Gb iPod, HP USB Speakers, Sony MDR-V500 Headphones, Sony Vaio F-Series Laptop
He can't get to disk mgmt, because he can't boot windows.

Therefore he is booting win7dvd/repair repair disc.

You could try a partition undelete function.

Free partition Wiz boot disc has a good one.

http://www.partitionwizard.com/partition-wizard-bootable-cd.html

Boot it up, do a quick scan of the whole disk - the disk that your windows partition is on.

Tick ALL the partitions you want to keep, Yes, Apply.

See if that does it.
 

My Computers

System One System Two

  • Computer type
    PC/Desktop
    OS
    7 X64
    CPU
    i5 8400
    Motherboard
    gigabyte b365m ds3h
    Memory
    2x8gb 3200mhz
    Hard Drives
    various
    PSU
    pure power 11 400w cm
    Case
    Coolermaster
    Cooling
    cryorig m9i
  • Computer type
    PC/Desktop
    OS
    7x64
    CPU
    g5400
    Motherboard
    ga b365m ds3h
    Memory
    8gb ddr4 2400
    PSU
    xfx pro 450w
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