Lenovo computer partition lost

Case:Ms. Yang is a financial employee of a company. When entering the information, the power off is accidentally disconnected. The partition information in the computer is gone. Solution:The accidental shutdown caused by accidents. This situation hurts the hard disk. After finding the data was lost, Ms. Yang quickly came to our company by searching.Ms. Yang’s…

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6 Reasons BIOS will not detect or recognize your drive (2)

Reason 2: Incorrect jumper settings on the drive

Serial ATA:  If you have a 3.0 Gbit/sec SATA drive that is not being detected by your 1.5 Gbit/sec SATA controller, or it causes your system to lock up when connected to a 1.5 Gbit/sec SATA controller, you may need to jumper your 3.0 Gbit/sec SATA drive to the slower speed of 1.5 Gbit/sec for the system to recognize it properly.

Jumper settings for Seagate SATA drives

Jumper settings for Seagate SATA drives

Jumper settings for Maxtor-brand SATA drives

Jumper settings for Maxtor-brand SATA drives

ATA:  It is recommended that all Seagate ATA hard discs supporting the Cable Select jumper option be configured as Cable Select. If your computer system was built prior to October 1998 and does not support UDMA 66 or greater you will be required to use the Master/Slave jumper settings.

Jumper settings for Seagate ATA drives

Jumper settings for Seagate ATA drives

Jumper settings for Maxtor-brand ATA drives

Jumper settings for Maxtor-brand ATA drives

When using Cable Select jumper settings on your ATA drive, all devices connected to the UDMA cable must also use the Cable Select setting. The cable decides master/slave device detection when the cable select jumper settings are used.

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How to partition, format, or reformat an internal or external drive on Mac OS X 10.4?

Please follow the steps below to format hard drive:

1. Double left-click on your Internal Mac drive and choose Applications -> Utilities and double-click on Disk Utilities.

format hard drive

2. In the far left pane, choose the drive that you want to partition and format. Typically there are two listings for each drive unless you have more than one partition on a particular drive. Choose the drive listing that is farthest to the left for the drive that you want to format. It is usually directly above the name of the drive.

format hard drive

3. Click the Options button and choose Apple Partition Map. Then click on Ok.

format hard drive

Note: If you cannot choose Options because it is grayed out, click on the Current dropdown menu and click on 1 partition. This should make the Options button useable again. Also, if you receive an error that the drive cannot be unmounted, shut down the Mac, unplug the drive from the Mac, turn you Mac back on and when it is fully loaded to the desktop, connect the drive and try again from Step 1.

format hard drive

4. Change the Format to Mac OS Extended (Journaled). You can also give the drive a name by typing it into the Name box. When you are done, click on Partition.

Partition hard drive

5. A box will come up letting you know that formatting and partitioning the drive will erase all of the information that is on the drive. If you don’t need any of the information on the drive, then click on Partition.

Partition hard drive

6. The drive is now formatting and you will see a status bar at the bottom that says Creating Partition Map. When it is done, this bar will go away and the drive should now show up on your desktop.

Partition hard drive

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