El Capitan doesn't recognize internal HD

Question

Level 1

8 points

I've got a Mac Pro 2009 running 10.6.8 from a SSD drive.

I installed a WD 8 TB red HD. All perfect.

In a 2nd partition of the SSD drive, I've installed El Capitan.

But El Capitan doesn't recognize the WD HD. If I boot 10.6.8 it's Ok. But if I boot El Capitan, the HD is missing, even in Disk Utility.

Any ideas?

Thanks.

Mac Pro, OS X El Capitan (10.11.4)

Posted on May 5, 2016 3:25 PM

Reply

Answer 1

Level 10

210,411 points

Post a screenshot of what Disk Utility in SL shows about the disk.

If you look in System Profiler under SATA/SATA Express in El Capitan does the disk show?

Reply

Answer 2

Level 1

8 points

Hello, Illaass. And thank you.

Reply

Answer 3

Level 10

210,411 points

I have no clue

Reply

Answer 4

Level 1

8 points

Thank you, anyway, Illaass.

Reply

Answer 5

Level 1

8 points

Problem solved. I changed the hd to tray 3 and now it's all right. And another hd in tray 4, were the WD HD didn't work, is ok also.

Reply