Jump to content
coltonc18

Do old motherboards have a drive limit?

11 posts in this topic Last Reply

Recommended Posts

Anyone have any thoughts on this?

I have an unraid server running 13 drives. I have bought 2 more drives to add to the system. But it is only detecting one of them, and I'm not sure why.

Do older motherboards actually have a limit of 14 sata drives? I was hoping to not upgrade the whole system until I was ready to go 4k, as it works fine as it is currently.

Here is the setup. My case supports 20 drives, I've got 16 of them wired up right now.

One row only has 2 drives in it, and I have one cable running for that whole row, so I know they should all be good to run.

Any thoughts?

 

Here are a few pics. Not really sure what you'd need to see. 

MVIMG_20190306_055300.jpg

IMG_20190306_055302.jpg

Share this post


Link to post

There can be a limit on on many drives are detected in the bios, including not being able to select the correct boot device once past a certain number of devices, but all drives should still be detected by Unraid (if able to boot).

Share this post


Link to post
10 minutes ago, johnnie.black said:

There can be a limit on on many drives are detected in the bios, including not being able to select the correct boot device once past a certain number of devices, but all drives should still be detected by Unraid (if able to boot).

Yeah, the system is up and running right now. I have one of the new 10 TB drives doing a preclear on the drive before adding to the array. 

 

But more drives won't even show up in the unassigned devices section. 

Share this post


Link to post

The card that I'm running is SUPERMICRO AOC-SAS2LP-MV8 PCI-Express 2.0 x8 SATA / SAS 8-Port Controller Card. 

 

As to is it showing in the bios, I'm not sure. There is no monitor attached to the server anymore, or one near. So I can't see the boot up process. 

 

Here is diagnostic. 

tower-diagnostics-20190306-0633.zip

Share this post


Link to post

Currently it's detecting 13 disks plus one SSD, assuming the undetected disks are on the second SAS2LP the more likely explanation is you're using the wrong miniSAS cables being used (reverse instead of forward breakout) or using disks with 3.3v SATA pin disable.

Share this post


Link to post
1 minute ago, johnnie.black said:

Currently it's detecting 13 disks plus one SSD, assuming the undetected disks are on the second SAS2LP the more likely explanation is you're using the wrong miniSAS cables being used (reverse instead of forward breakout) or using disks with 3.3v SATA pin disable.

There are 14 disks installed and 1 SSD. 3 of the HD are going to 1 card, but it's only detecting 2 of them. 

 

8 disks are going to the other card. And the other 4 are going to the sata ports directly on the board. 

Share this post


Link to post
1 minute ago, coltonc18 said:

3 of the HD are going to 1 card, but it's only detecting 2 of them. 

Then assuming they are all on the same miniSAS cable

1 minute ago, coltonc18 said:

using disks with 3.3v SATA pin disable.

Google "3.3v SATA pin"

Share this post


Link to post
8 minutes ago, johnnie.black said:

Then assuming they are all on the same miniSAS cable

Google "3.3v SATA pin"

Yes, they are. 

 

The other port that hooks to the other 4 drive bays doesn't work either. I'll Google that, and see what I find. 

Thanks 

Share this post


Link to post
10 minutes ago, johnnie.black said:

Then assuming they are all on the same miniSAS cable

Google "3.3v SATA 

That's not the issue, it says the drives won't even start, and when I was swapping it yesterday into different bays, I could feel the drive spinning. 

Share this post


Link to post

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.