12 minutes ago, TheBlueKingLP said:

How do I remove a disk that has data on it?

 

You have to copy the files to somewhere else first, then

 

23 minutes ago, trurl said:

you would have to New Config and rebuild parity without the disk

 

However, what puzzles me is that in your OP you said

 

On 8/19/2018 at 1:43 PM, TheBlueKingLP said:

Things tried:

Unplug disk

Reboot machine

 

And when I asked if doing either cured the problem you answered "no". So have you tried unplugging the disk or not? This thread seems to be going round in circles and getting nowhere. A number of people have made suggestions to try to help you but you seem reluctant to act on any of them.

 

Edited August 21, 20187 yr by John_M

4 minutes ago, John_M said:

 

You have to copy the files to somewhere else first, then

 

 

However, what puzzles me is that in your OP you said

 

 

And when I asked if doing either cured the problem you answered "no". So have you tried unplugging the disk or not? This thread seems to be going round in circles and getting nowhere. A number of people have made suggestions to try to help you but you seem reluctant to act on any of them.

 

I have unpluged the disk but I have unraid emulating the content of the drive.

Another question: I have another linux server which has the disk image on an unassigned device,but the linux server is lagging,why is it lagging if it is not on the array?

20 minutes ago, TheBlueKingLP said:

I have another linux server which has the disk image on an unassigned device,but the linux server is lagging,why is it lagging if it is not on the array?

Do you mean some linux OS that is not unRAID?

22 minutes ago, TheBlueKingLP said:

the linux server is lagging

 

Lagging in comparison to what?

3 minutes ago, trurl said:

Do you mean some linux OS that is not unRAID?

A Debian running a game server

2 minutes ago, trurl said:

 

Lagging in comparison to what?

Before adding the drive and after adding the drive. There is a big difference

Update: I fixed it by removing an unassigned drive. Why is that? How can I add more hard disk later without the lag? Why does an unassigned device affect the array?

Anyone know how?

Marginal power supply?

1 hour ago, trurl said:

Marginal power supply?

 

That's a possibility. Another possibility is that some cable isn't fitted well and is moved when adding or removing the drive.

10 hours ago, pwm said:

 

That's a possibility. Another possibility is that some cable isn't fitted well and is moved when adding or removing the drive.

Actually, the problem is fixed by removing a external USB unassigned device, why does that even affect the array?

Just now, TheBlueKingLP said:

Actually, the problem is fixed by removing a external USB unassigned device, why does that even affect the array?

 

Linux expects to have a very good connection to all disks and to receive prompt responses when interfacing with the disks.

 

If the USB connection has lots of transfer errors and the Linux kernel stays in a critical section waiting for a response or a timeout, then you can get slowdowns. A number of disk operations in the kernel have barrier requirements, where no new actions are allowed until previous actions have been acknowledged. This is required to maintain consistent file systems and be able to recover to a stable state in case of a power loss.

 

You might have a bad USB cable. Or a bad power supply for the external disk. Or maybe the disk isn't in a good state.

4 minutes ago, pwm said:

 

Linux expects to have a very good connection to all disks and to receive prompt responses when interfacing with the disks.

 

If the USB connection has lots of transfer errors and the Linux kernel stays in a critical section waiting for a response or a timeout, then you can get slowdowns. A number of disk operations in the kernel have barrier requirements, where no new actions are allowed until previous actions have been acknowledged. This is required to maintain consistent file systems and be able to recover to a stable state in case of a power loss.

 

You might have a bad USB cable. Or a bad power supply for the external disk. Or maybe the disk isn't in a good state.

I have no problem using that specific unassigned device before i add the wd hard drive

3 minutes ago, TheBlueKingLP said:

I have no problem using that specific unassigned device before i add the wd hard drive

 

2.5" or 3.5" USB drive?

5 hours ago, pwm said:

 

2.5" or 3.5" USB drive?

2.5, works fine, i think to many drive is the problem (does not exceed the license limit)

2 hours ago, TheBlueKingLP said:

2.5, works fine, i think to many drive is the problem (does not exceed the license limit)

 

If 2.5" drive, then I assume it's powered over USB. Maybe interference from USB is affecting the system. I have seen several systems where USB communication - especially with 2.5" drives - can be clearly heard in the loudspeakers.

 

Or maybe the new WD disk is the first disk to use a different controller on the motherboard, and the USB host is sharing an interrupt with this SATA controller.

5 hours ago, pwm said:

 

If 2.5" drive, then I assume it's powered over USB. Maybe interference from USB is affecting the system. I have seen several systems where USB communication - especially with 2.5" drives - can be clearly heard in the loudspeakers.

 

Or maybe the new WD disk is the first disk to use a different controller on the motherboard, and the USB host is sharing an interrupt with this SATA controller.

Not really sure, at least i have got a temporary solution, unplug the usb drive.

But no long term solutions yet, don't know how to add more drive without lag. I moved three sata cable by 1 slot because the cable is in the way when i install the wd harddrive.