I updated to unraid v6.1.6 a few days ago. Everything seems to have gone fine.

 

Two days ago  I started to preclear a new 4 TB drive using the preclear plug-in. All was going fine until about 23 hours into it, about 22% into the post-read cycle. At that point it just stopped. I looked at a few things that I didn't really understand, and decided to just start over with a traditional preclear using screen and the command line.

 

It just stalled again at 25 plus hours, 51% into the post-read

 

If I go to Unassigned Devices and click on the drive in question, I see that it's telling me that the disk must be spun up before getting a "Last SMART test result". But when I try to spin it up it won't let me.

 

I'm attaching a syslog which appears to start throwing errors at about 15:33 on Dec 21st, right about when the preclear froze.

 

I'm also attaching two smart reports. One is a report that appears to terminate early is taken before a system reboot.

The second is taken after a reboot and appears ok to me.

 

Can someone help me understand what's going on here. Do I have a defective disk, if so I can easily return it as it was bought via Amazon. If not, what's going on, and what do I need to do?

 

Thanks in advance.

 

 

 

 

syslog.zip

ST4000DM000-1F2168_Z303KBBL-20151221-1630.txt

ST4000DM000-1F2168_Z303KBBL-20151221-1638.txt

Disk dropped offline, as there are a couple of crc errors it could be a bad sata cable, change cables/backplane and try again, if it still fails to preclear replace disk.

Disk dropped offline, as there are a couple of crc errors it could be a bad sata cable, change cables/backplane and try again, if it still fails to preclear replace disk.

 

Thanks.

 

I'm using a Norco 4220. The bay that this disk is in is attached via an SAS backplane to one of the SATA ports on the motherboard. I believe the cable I'm using is a SAS to SATA Reverse Breakout Cable. I can replace that but certainly don't have a spare around.

 

Here's my plan:

I just reseated the drive in the bay and made sure the bay was secure in the chassis. I pushed on all the connectors just in case one was loose, and started the pre-clear again. If it completes, then all is well.

 

If it fails again, I'm going to try to preclear it again in a different slot. I still have plenty of empty bays including several that are attached to IBM M015 cards. If it fails there, I'll send the disk back. If it passes I'll replace the cable on the problematic bay and then preclear the drive again in the original bay. I usually make several cycles through preclear and as this is in service of a hot spare, I don't have to rush as nothing in the array is depending on this drive being cleared.

 

I'll report back how it goes.

 

Thanks again for your help.