We go through a lot of hard drives where I work and recently we have run into a major issue with one Western Digital 1TB Black series hard drive. Specifically the WD1001FALS The issue was this, if we did a cold boot on our system with the WD1001FALS installed, the drive would not show up in the BIOS. Now if we left the system on and simply reset the system, the drive would appear in the BIOS and work perfectly. Now the fix for this issue was to disable quick boot in the BIOS and that seemed to give the drive enough time to initialize and the BIOS would see the drive every time. Basically you just need to slow down your boot sequence so the drive can initialize before the BIOS tries to read from them, enabling AHCI mode or RAID mode seemed to fix this issue as well. This issue only seems to be showing up on newer versions of the WD1001FALS. After working with Western Digital on this issue here was their response. So it seems the addition of this feature is what is causing this issue, as usual they deny that this is a problem. So my question to the rest of the forum is have any of you seen this problem on this drive or any other recent Western Digital drives?