ReadyNAS Duo v1 HDD replacement problems

Sorry it's taken so long to respond to your reply! I had other higher-priority things to attend to and my frustration level with this was too high.

Yes, the system status was shown to be redundant. I tried rebooting from the admin console, but it wouldn't reboot. When I finally did a manual reboot, the unit did reboot, but then other problems started. Below is the sequence of events (via email) with a few comments to help clarify...

Seagate 1TB HDD is original disk. (Channel 1)
WD 2TB HDD #1 is redundant disk added a few months back. (Channel 2)
WD 2TB HDD #2 is recently purchased disk to replace Seagate HDD.

RAIDiator 4.1.13 was running. Previous attempts at updating failed. Not sure why, but figured I'd wait until after getting both disks in unit with good status before addressing it.
[Wed Feb 11 15:12:04 CST 2015] New ReadyNAS firmware available
Name: RAIDiator
Version: 4.1.14
Date: Thu Oct 2 13:08:21 2014
Size: 57583104
[Wed Feb 11 15:12:04 CST 2015] New SMART disk errors detected!
This was the ongoing failure with Seagate HDD.
[Wed Feb 11 15:12:04 CST 2015] Disk failure detected
Disk fail event occurred on SATA channel 1.
If the failed disk is used in a RAID level 1, 5, or X-RAID volume, please note that volume is now unprotected, and an additional disk failure may render that volume dead.
removed Seagate 1TB HDD from Channel 1
[Wed Feb 11 15:12:04 CST 2015] Hotplug disk event detected
Disk remove event occurred on SATA channel 1.
added WD 2TB HDD #2 to Channel 1
[Wed Feb 11 15:35:08 CST 2015] Hotplug disk event detected
Disk add event occurred on SATA channel 1.
[Wed Feb 11 15:35:16 CST 2015] RAID event detected
Disk initialization started.
[Wed Feb 11 20:11:27 CST 2015] RAID event detected
RAID sync started on volume C.
[Wed Feb 11 20:11:28 CST 2015] RAID event detected
Disk initialization successfully finished.
[Thu Feb 12 00:20:49 CST 2015] RAID event detected
RAID sync finished on volume C. The volume is now fully redundant.
[Thu Feb 12 07:30:52 CST 2015] RAID event detected
RAID sync started on volume C.
[Thu Feb 12 07:31:21 CST 2015] Disk usage warning
Volume is approaching capacity: 100% used, 832k available.
[Thu Feb 12 07:31:?? CST 2015] Volume expansion requires reboot
The first stage of the in-place volume expansion is done. Please reboot the device to complete the volume expansion.
[Thu Feb 12 07:31:?? CST 2015] System Update Status
Your ReadyNAS device has been updated with a new firmware image. (RAIDiator 4.1.14)
[Thu Feb 12 11:58:?? CST 2015] Disk capacity expansion error. pvcreate /dev/hdc5 /dev/hdc6


At this point, the unit would not properly boot and could not be detected by RAIDar. Therefore, I did an OS reinstall from the Boot Menu. Now, RAIDar detects the unit, shows both HDD present (green LEDs) and shows RAIDiator v4.1.13. However, I cannot view FrontView in a web browser nor access any shares despite the fact that they appear in a file explorer. I also received an email alert that missing shares are detected. I can also ping the unit.

I'm at a complete loss at this point as to what to do to either resolve the problems all together or even further diagnose the problems. Since I can't afford to lose any more hair, any and all help is greatly appreciated! ;-)

John