ok.
So I RMA-ed the drive and got a new one yesterday.
I've got 3 drives in the machine, all the same WD 2tb green drives.
I decided to preclear them all again.
I started them all off at the same time.
The 2 old drives finished preclearing in about 16 hours but the new drive is still preclearing after 25 hours and showing no signs of finishing anytime soon.
Here is the current status : note the read speed is 468 kB/s
unRAID server Pre-Clear disk /dev/sdd
= cycle 1 of 1, partition start on sector 64
= Disk Pre-Clear-Read completed DONE
= Step 1 of 10 - Copying zeros to first 2048k bytes DONE
= Step 2 of 10 - Copying zeros to remainder of disk to clear it DONE
= Step 3 of 10 - Disk is now cleared from MBR onward. DONE
= Step 4 of 10 - Clearing MBR bytes for partition 2,3 & 4 DONE
= Step 5 of 10 - Clearing MBR code area DONE
= Step 6 of 10 - Setting MBR signature bytes DONE
= Step 7 of 10 - Setting partition 1 to precleared state DONE
= Step 8 of 10 - Notifying kernel we changed the partitioning DONE
= Step 9 of 10 - Creating the /dev/disk/by* entries DONE
= Step 10 of 10 - Verifying if the MBR is cleared. DONE
= Post-Read in progress: 2% complete.
( 40,265,318,400 of 2,000,398,934,016 bytes read ) 468 kB/s
Disk Temperature: 23C, Elapsed Time: 25:57:43
Surely this drive cant be faulty as well?
I tried changing the cables and the sata port on the old drive and it made no difference
Any ideas what might be going on here?