Thecus RAID storage device - disk warnings!!

butterhook
butterhook used Ask the Experts™
on
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


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DavidPresident
Top Expert 2010

Commented:
No worries.   2 disks had a few bad sectors which were automatically replaced.  Aren't you glad you have it configured for RAID5? Had you configured for RAID0, then you would have partial data loss.  The disks have thousands of spare sectors, so don't worry.  Now if you had hundreds of bad sectors popping up all at once, then you would have something to worry about.

The system worked!

Commented:
Those are actually the SMART results from the drives. I would only worry if the Power On Hours wasnt what it is. Now if it was 24hrs with that many ECC Recovered Errors I would be worried.

Author

Commented:
So you guys both reckon that the errors are not worth worrying about?
President
Top Expert 2010
Commented:
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 :)

Author

Commented:
Cheers

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