Hello,

 

I just replaced 2 HDs with brand new Seagates ST33000650NS and both were precleared successfully and without errors but after I copied some data and invoke the mover, one of them dropped offline and both showing tons of errors.

Log attached. Can someone help decipher what is going on? TIA.

tower-diagnostics-20170130-0111.zip

Both Disk 4 and Disk 8 dropped off-line. As a result there is no SMART report for them. Power down, check the power and SATA cables to them, then restart and grab diagnostics again.

 

And CAREFULLY double check that all SATA data cable and SATA power cables are securely seated on every drive.  (This is a common problem as IT is very easy to 'loosen' SATA connectors when changing drives!)

Definitely check both data and power cables. Happened to me several times now. And also double check that your PSU has enough wattage. Drive spinning up actually creates a small surge.

I just rebooted and drive 4 came up but drive 8 doesn't appear to be online. These are new drives. I'm not sure what to make of it. Log file attached.

tower-diagnostics-20170130-1440.zip

The disks were all on-line at the time you grabbed the new diagnostics but Disk 8 was disabled and being emulated. The SMART reports for Disks 4 and 8 are good so you can rebuild Disk 8 onto the same physical disk. Stop array. Unassign Disk 8. Start array. Stop array. Re-assign Disk 8. Start array and let it rebuild.

 

Your motherboard SATA ports appear to be in IDE emulation mode. You should change them in your BIOS to AHCI mode.

 

You're running an old version of unRAID (6.2). You should upgrade to 6.2.4.

 

Thanks John. Not sure why it dropped offline. I rebuild disk 8 once before because of the exact same problem.

Thanks John. Not sure why it dropped offline. I rebuild disk 8 once before because of the exact same problem.

 

I have one disk in my Media server which fails to come on line if the BIOS is set to a 'fast boot'.  (It happened with two different MB's!)  I can remember having a similar issue about twenty years ago when I had to set a BIOS to do a full memory check to allow a hard disk to get up to speed so it would come on line before the boot process started.

Dropping off-line and being disabled are two different things. A disk drops off-line if the controller loses contact with it. unRAID disables a disk if a write operation fails and continues with the disk being emulated.

Checking the cables and cycling the power brought the disk back on-line (the evidence is the fact that a SMART report could be obtained from it) but it will remain disabled until you rebuild it.

 

Thanks John. Not sure why it dropped offline. I rebuild disk 8 once before because of the exact same problem.

 

I have one disk in my Media server which fails to come on line if the BIOS is set to a 'fast boot'.  (It happened with two different MB's!)  I can remember having a similar issue about twenty years ago when I had to set a BIOS to do a full memory check to allow a hard disk to get up to speed so it would come on line before the boot process started.

 

Dropping off-line and being disabled are two different things. A disk drops off-line if the controller loses contact with it. unRAID disables a disk if a write operation fails and continues with the disk being emulated.

Checking the cables and cycling the power brought the disk back on-line (the evidence is the fact that a SMART report could be obtained from it) but it will remain disabled until you rebuild it.

 

 

You are right.  Now, as I think back on it, The disk on my Media server was listed as 'missing' which I believe is another category from 'dropping off-line' or being 'disabled'.

Thanks guys. I'll check the BIOS.