internal sata drive doesn´t show up after restart
 

I run a dualboot system (Mavericks / Sierra), both on a dedicated internal ssd. I bought a new internal hard drive (Western Digital WD Black 4TB) for Libraries / Samples.

After starting the mac all disks show up but if I choose to restart from the other system-drive the Western Digitak Disk doesn´t mount and it´s not shown in the disk utility, too. I have to shut the mac down. Then after rebooting all disks are back again. Also if I do a restart but not changing the startup disk the disk comes up without problems. So the problem only occurs by doing a restart by switching the system drive.

Does someone have any advice how to fix this issue ?

Thanks in advance

Re: internal sata drive doesn´t show up after restart
 

no one, no idea ? :rolleyes:

Re: internal sata drive doesn´t show up after restart
 

What is the specific format of this problematic drive ?
Did you do it yourself, or just use it as it came out of the box ?

Re: internal sata drive doesn´t show up after restart
 

thanks for answering

I put it in one of the internal drive slots of the mac pro and formatted it with disk utility

I attached screenshots with system information about this specific drive

Re: internal sata drive doesn´t show up after restart
 

I dual boot my 2012 MacPro into either Yosemite or Sierra and my drives all show up okay in Finder and Disk Utility. I don't have them show on my desktop though. I have two WD Blacks 4 TB each with 64 meg cache - yours have the 128 meg cache in the internal drive bays 1 and 3. I boot from a Samsung 850 EVO 1 TB that sits on a pcie adapter card and that ssd is split into two equal boot partitions.

I don't understand something - are you booting off two separate drives - one for Sierra and the other for Mavericks? If so where are those drives? It looks like you have five drives which would mean you either have one ssd on a pcie card or a drive sitting in the lower optical drive bay.

Where are you selecting which drive to boot off of? System preferences or holding down the option key on bootup?

Re: internal sata drive doesn´t show up after restart
 

I don't know why it is displaying an MS-DOS FAT32 Volume.

I would reformat as 1 partition.
Note: I hate the Sierra Disk Utility, so reboot into Mavericks.
Launch Disk Utility.
Select the actual mechanism.
Choose the Partition tab.
Create 1 Partition - Mac OS Extended (Journaled)

See if that gets rid of that weird EFI (MS-DOS FAT32) & POOL 2 split.

Re: internal sata drive doesn´t show up after restart
 

Yes this is correct . I have 5 drives using in addition the lower optical drive bay. I have for Sierra a dedicated ssd drive in one of the internal bays and also a seperate ssd for mavericks. I switch the boot drive with a apple script that I found in the web since I cannot selct in mavericks the sierra drive as startup volume. Sometimes I also use the option key during startup which also works

Thanks for answering !

Re: internal sata drive doesn´t show up after restart
 

Strange ... all my internal drives have that EFI partition and running since years without problems. But I will try that. Thanks !

Re: internal sata drive doesn´t show up after restart
 

But which procedure is giving you the problem? Using the script you found on the web (who knows how safe/good that is?) or the option key on boot up? I would stick with the option key on boot up. It takes a little longer to bootup but is a known good method. And I'm guessing the Mavericks ssd is also in a drive bay right?

Re: internal sata drive doesn´t show up after restart
 

I wrote it in my first thread post: after the mac was completely shut down and then start (no matter from what system drive) all drives apear correctly. And there´s also no problem if I then restart from the same system drive again. All drives appear then, too. BUT if I restart the mac from the other system drive than that which is currently running (f.e. Sierra is active and then restart from Mavericks) this very WD 4TB drive doesn´t appear again. I noticed that the drive doesn´t spin up.I have to shut the mac down and restart to make it active again :rolleyes: