My HP Pro 4321s notebook (with Windows 7 Professional 32-bit installed) failed to boot up. As I did not backup the data files (this notebook was used for only a few months), I disconnected the notebook hard disk and installed it to an external disk case (SATA interface to connect my notebook harddisk and USB 2.0 interface for connection to other PC or notebook's USB port). After I connected this external disk to another notebook (windows 7 Professional 64-bit), a pop-up window asking me to run CHKDSK for SYSTEM (F:) appeared. Therefore, I answered 'YES' to dismount the volume and proceed. After CHKDSK had finished for this drive F: , it showed file rec segment 96-99 unreadable. The CHKDSK report was then displayed. Then, another pop-up window appeared : Drive G:\ You need to format the disk drive before you can use it. Do you want to format it ? I replied 'No' and Message : 'Error : G:\ is not accessible. Data error (cyclic redundancy check)' was displayed. The factory hard disk contains 3 drives : one is C:\, one is HP Recovery, one is HP_Tools and a hidden 'SYSTEM'. The explorer could only showed properties of HP Recovery and HP_Tools. 'SYSTEM' properties could only be seen before I replied 'Y' to dismount the volume to proceed CHKDSK. (Please refer to the captured screen below). One more thing I would like to mention is that before the boot-up failure of my HP Pro4321s, the window explorer seemed unstable as the mouse icon was in busy state for some while whenever I wanted to type a new http:// to open a new webpage. I tried to reload the system with safe mode. The first time was successful. However, when I wanted to shut down the system after my work, 'Shutdown' disappeared. I simply powered off the notebook and reboot with safe mode. However, safe mode failed this time during drivers installation. Grateful if anybody could tell me if I can recover the data from the hard disk G:\.

Hi, Have you tried the following * Run command prompt * Execute Command chkdsk G: /f /r - This will take some time to run, however once complete, reboot and attempt to access again. MartinIf you find my information useful, please rate it. :-)

Hi, "You need to format the disc in drive G: before you can use it" I would suggest you to remove the drive letter G using disk management and assign a different drive letter for the drive and check if it helps you fix the issue and if the drives works fine. Hope this helps.Spencer TechNet Community Support