Question : Thecus RAID storage device - disk warnings!!

Hello

Two of the drives in my Thecus 2TB RAID (4 * 500gb) device display a warning.

The device is a Thecus 1U4500 IP Storage Server, firmware version 2.00.12

Upon clicking through the Warnings about each drive, the results are as follows:

Tray 1

Tray Number      1
Model      ST3500320NS
Power On Hours      18573 Hours
Temperature Celsius       36
Reallocated Sector Count      1
Current Pending Sector       0
Raw Read Error Rate       11717515
Seek Error Rate       N/A
Hardware ECC Recovered       11717515

Tray 3

Tray Number      3
Model      ST3500320NS
Power On Hours      15648 Hours
Temperature Celsius       35
Reallocated Sector Count      4
Current Pending Sector       0
Raw Read Error Rate       150702080
Seek Error Rate       N/A
Hardware ECC Recovered       150702080

Should I be worried?

I have two spare drives... but I'm concerned about taking the array down - in case it doesn't come back up again....

What would be the best plan of action?

Out of interest, here is similar information for one of the drives which isn't displaying a warning:

Tray 2 - No Warning on this tray

Tray Number      2
Model      ST3500320NS
Power On Hours      18573 Hours
Temperature Celsius       35
Reallocated Sector Count      0
Current Pending Sector       0
Raw Read Error Rate       78871122
Seek Error Rate       157228388
Hardware ECC Recovered       78871122

Answer : Thecus RAID storage device - disk warnings!!

Nothing to worry about. Like I said, the system worked.  A few sectors were reallocated.  In fact, only 5 reallocated sectors in 15,000+ hours.  Not too shabby :)