Perfectly good drive being wrongfully accused as dead?

Users do have problems with "green" drives and although some are on the HCL they are not recommended.
Tested with seatools extended tests? In your other thread you say you used "generic" testing software?
What size is the drive?
How many drives in the array?
Are the drives all the same model?
Is this on a NV, and what firmware?
Have you tried it in a different slot - to do this safely you would need to backup, rearrange your drives and restore from backup. I don't think you can just reorder the drives without creating a problem.

I have mixed green/red drives and 7200 rpm drives in the same RAID array and not seen any issues. This was on a pro-6 though, not an NV+, and the 7200 RPM were seagates, the slower were WDC.

You might try removing power from the NAS for a while (15 minutes maybe) and then restarting.

If that doesn't resolve it perhaps try powering down, removing all drives, and putting just the LP drive in a different slot. Then see if the install works. If it does, try moving the LP to the current slot (NAS powered down) and see if it works there. You could potentially have bad slot.

miogpsrocks, you have recently said you tried seatools and it was failing drives when connected to USB, is this one of the drives you had tested like this and did you use seatools with a sata connection as advised?

viewtopic.php?f=24&t=81152

vandermerwe wrote:
miogpsrocks, you have recently said you tried seatools and it was failing drives when connected to USB, is this one of the drives you had tested like this and did you use seatools with a sata connection as advised? viewtopic.php?f=24&t=81152

Maybe also run the (destructive) write test - I've found it sometimes finds issues that the non-destructive tests miss.

vandermerwe wrote:
miogpsrocks, you have recently said you tried seatools and it was failing drives when connected to USB, is this one of the drives you had tested like this and did you use seatools with a sata connection as advised? viewtopic.php?f=24&t=81152

That was an entirely different raid system using an entirely different drive. That was for an old X6 using a Western Digital green drive.

This is for a newer 6-bay system, RAID 2 readynas pro using a seagate LP drive which I believe its seagate's version of a green drive.

StephenB wrote:
vandermerwe wrote: miogpsrocks, you have recently said you tried seatools and it was failing drives when connected to USB, is this one of the drives you had tested like this and did you use seatools with a sata connection as advised? viewtopic.php?f=24&t=81152 Maybe also run the (destructive) write test - I've found it sometimes finds issues that the non-destructive tests miss.

What software can run these" destructive write test"?

vandermerwe wrote:

Users do have problems with "green" drives and although some are on the HCL they are not recommended. Tested with seatools extended tests? In your other thread you say you used "generic" testing software? What size is the drive? How many drives in the array? Are the drives all the same model? Is this on a NV, and what firmware? Have you tried it in a different slot - to do this safely you would need to backup, rearrange your drives and restore from backup. I don't think you can just reorder the drives without creating a problem.

The drive is 2TB, there are 6 drives in the array, they are all the Seagate LP model except the drive that was flagged as dead and I replaced it with a new Hitichi however the old drive has passed Seatools extended test and basic test(using internal sata connectors which was a real pain by the way)
I also tested it as a generic drive using the Hitichi drive fitness test which is their version of seatools.

Model: ReadyNAS Pro Business Edition [X-RAID2]
Firmware: RAIDiator 4.2.27
Disk 1 Hitachi HDS722020ALA330 1863 GB , 34 C / 93 F , Write-cache ON
Disk 2 Seagate ST32000542AS 1863 GB , 33 C / 91 F , Write-cache ON
Disk 3 Seagate ST32000542AS 1863 GB , 31 C / 87 F , Write-cache ON
Disk 4 Seagate ST32000542AS 1863 GB , 32 C / 89 F , Write-cache ON
Disk 5 Seagate ST32000542AS 1863 GB , 33 C / 91 F , Write-cache ON
Disk 6 Seagate ST32000542AS 1863 GB , 30 C / 86 F , Write-cache ON

I have not tried a different slot as this system has like 98% filled with data. I could probably try it out on a different readynas system.

StephenB wrote:

I have mixed green/red drives and 7200 rpm drives in the same RAID array and not seen any issues. This was on a pro-6 though, not an NV+, and the 7200 RPM were seagates, the slower were WDC. You might try removing power from the NAS for a while (15 minutes maybe) and then restarting. If that doesn't resolve it perhaps try powering down, removing all drives, and putting just the LP drive in a different slot. Then see if the install works. If it does, try moving the LP to the current slot (NAS powered down) and see if it works there. You could potentially have bad slot.

Are you saying there might be a way for the readynas to put put the hard drive flagged as bad back inside the array?

Since the system has a lot of data on it and is not a new install, I don't think I can just switch the drives for testing purposes but perhaps I would try the drive in a future readynas and see if it causes issues.

I did run seatools from inside the computer using the short and long test and it passes both of them.

I think at one point, the Raidar software showed the drive with a " +" and it said spare when I put the mouse over the icon. It seem like it had kicked it off the array then was treating it like a good drive afterwards.

vandermerwe wrote:
miogpsrocks, you have recently said you tried seatools and it was failing drives when connected to USB, is this one of the drives you had tested like this and did you use seatools with a sata connection as advised? viewtopic.php?f=24&t=81152

I used the sata for the seatools which way not easy by the way. It passed both short and long test.

It also passed the hitichi drive fitness test as well as crystal disk info test. The drive shows as green light good to go without any warning.

Seatools can do a Full Erase, which is essentially a destructive write test.
Your data volume is very full, could have something to do with it.
Is the data backed up? If so you could try to swap out one of the other LP disks with the problematic one.
Try the disk in another system first perhaps.