Davo,
A new e-mail notification was sent this morning which does indicate which drive is failing(but has not failed yet).
So I guess that is why the led for that drive is not red. It must turn red after a drive has failed.
It also looks like it is important not to replace a drive that has a green LED while the terastation is powered on, which mine still does.
Instructions indicate to unmount the drive first or shut it down and then swap out the drive. Does this sound correct?
fyi here was the email I received, and thanks for the help.
Drive 1 [Normal]: No errors occurred.
Drive 2 [Normal]: No errors occurred.
Drive 3 [Notice]: Bad sectors have been detected.
Drive 4 [Normal]: No errors occurred.
Bad sectors have been detected on drive 3. Replacing the original drive with a new drive is recommended before the drive malfunctions.
Refer to the following page for information on drive replacement.
http://buffalo.jp/support_s/guide2/manual/path/help/index.html?&model=ts3410d®ion=US&version=4.00&lang=en&ref=109[TeraStation Information]
TeraStation Name: TS3410D002 (TS3410D)
Serial Number: 40386370700138
Time: 2018/10/17 04:10:21
Settings:
http://x.x.x.x/[Drive Error Status]
Drive 1: 0
Drive 2: 0
Drive 3: 0
Drive 4: 0
Drive 1 Model: ST2000VN004-2E4164
+-----+------------------------+--------+---------------+-------------+-----------------+-----+
| ID | Attribute | Status | Current Value | Worst Value | Threshold Value | RAW |
+-----+------------------------+--------+---------------+-------------+-----------------+-----+
| 5 | Reallocated_Sector_Ct | OK | 100 | 100 | 010 | 0 |
| 197 | Current_Pending_Sector | OK | 100 | 100 | 000 | 0 |
| 198 | Offline_Uncorrectable | OK | 100 | 100 | 000 | 0 |
+-----+------------------------+--------+---------------+-------------+-----------------+-----+
Drive 2 Model: ST2000VN004-2E4164
+-----+------------------------+--------+---------------+-------------+-----------------+-----+
| ID | Attribute | Status | Current Value | Worst Value | Threshold Value | RAW |
+-----+------------------------+--------+---------------+-------------+-----------------+-----+
| 5 | Reallocated_Sector_Ct | OK | 100 | 100 | 010 | 0 |
| 197 | Current_Pending_Sector | OK | 100 | 100 | 000 | 0 |
| 198 | Offline_Uncorrectable | OK | 100 | 100 | 000 | 0 |
+-----+------------------------+--------+---------------+-------------+-----------------+-----+
Drive 3 Model: WDC WD30EZRX-00DC0B0
+-----+------------------------+--------+---------------+-------------+-----------------+-----+
| ID | Attribute | Status | Current Value | Worst Value | Threshold Value | RAW |
+-----+------------------------+--------+---------------+-------------+-----------------+-----+
| 5 | Reallocated_Sector_Ct | OK | 200 | 200 | 140 | 0 |
| 197 | Current_Pending_Sector | OK | 200 | 200 | 000 | 17 |
| 198 | Offline_Uncorrectable | OK | 200 | 200 | 000 | 14 |
+-----+------------------------+--------+---------------+-------------+-----------------+-----+
Drive 4 Model: ST2000VN004-2E4164
+-----+------------------------+--------+---------------+-------------+-----------------+-----+
| ID | Attribute | Status | Current Value | Worst Value | Threshold Value | RAW |
+-----+------------------------+--------+---------------+-------------+-----------------+-----+
| 5 | Reallocated_Sector_Ct | OK | 100 | 100 | 010 | 0 |
| 197 | Current_Pending_Sector | OK | 100 | 100 | 000 | 0 |
| 198 | Offline_Uncorrectable | OK | 100 | 100 | 000 | 0 |
+-----+------------------------+--------+---------------+-------------+-----------------+-----+