***[link|https://www.ifixit.com/User/4259581/gerflash|gerflash] that will all depend on what you have tried. You want to make sure that your computer properly identifies your drive and it shows up in the BIOS etc. Make sure that this is not a software/setting issues. Ensure that your cabling is all properly routed and connected. If all that checks out you may have a failure on the drive control board. Hardware failure is possible but there would commonly clicking , or other noises. You may have to open the enclosure, checking the cables etc in there. You could try a different enclosure just to make sure that it is not the problem After that, it's the drive itself. Sometimes replacing the controller board will get your drive back***
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***[link|https://www.ifixit.com/User/4259581/gerflash|gerflash] ***that will all depend on what you have tried. You want to make sure that your computer properly identifies your drive and it shows up in the BIOS etc. Make sure that this is not a software/setting issues. Ensure that your cabling is all properly routed and connected. If all that checks out you may have a failure on the drive control board. Hardware failure is possible but there would commonly clicking , or other noises. You may have to open the enclosure, checking the cables etc in there. You could try a different enclosure just to make sure that it is not the problem After that, it's the drive itself. Sometimes replacing the controller board will get your drive back
***[link|https://www.ifixit.com/User/4259581/gerflash|gerflash|new_window=true] that will all depend on what you have tried. You want to make sure that your computer properly identifies your drive and it shows up in the BIOS etc. Make sure that this is not a software/setting issues. Ensure that your cabling is all properly routed and connected. If all that checks out you may have a failure on the drive control board. Hardware failure is possible but there would commonly clicking , or other noises. You may have to open the enclosure, checking the cables etc in there. You could try a different enclosure just to make sure that it is not the problem After that, it's the drive itself. Sometimes replacing the controller board will get your drive back***
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***[link|https://www.ifixit.com/User/4259581/gerflash|gerflash] that will all depend on what you have tried. You want to make sure that your computer properly identifies your drive and it shows up in the BIOS etc. Make sure that this is not a software/setting issues. Ensure that your cabling is all properly routed and connected. If all that checks out you may have a failure on the drive control board. Hardware failure is possible but there would commonly clicking , or other noises. You may have to open the enclosure, checking the cables etc in there. You could try a different enclosure just to make sure that it is not the problem After that, it's the drive itself. Sometimes replacing the controller board will get your drive back***
***[link|https://www.ifixit.com/User/4259581/gerflash|gerflash|new_window=true] that will all depend on what you have tried. You want to make sure that your computer properly identifies your drive and it shows up in the BIOS etc. Make sure that this is not a software/setting issues. Ensure that your cabling is all properly routed and connected. If all that checks out you may have a failure on the drive control board. Hardware failure is possible but there would commonly clicking , or other noises. You may have to open the enclosure, checking the cables etc in there. You could try a different enclosure just to make sure that it is not the problem After that, it's the drive itself. Sometimes replacing the controller board will get your drive back***