Seagate FreeAgent GoFlex external hdd is working but fails all hdd tests?

I did not use my Seagate FreeAgent GoFlex extenal hdd for a long time after which I found it not working. Windows format utility prompts rise when I connect the drive. But did not work. "Unable to format".

Then I checked this Thread :
I checked if the device was detected in the BIOS. It was and then as I booted naturally, walla! It formatted and read/write had no problems. Everything seemed fine magically.

But I tested the Seagate external hdd using its utility.
//All tests failed
Long Generic - FAIL 3/15/2015 11:30:51 AM
SeaTools Test Code: D49A95D5
Identify - Started 3/15/2015 11:32:02 AM
Short DST - Started 3/15/2015 11:53:28 AM
Short DST - FAIL 3/15/2015 11:53:30 AM
SeaTools Test Code: D49A95E5
Short Generic - Started 3/15/2015 11:53:40 AM
Short Generic - FAIL 3/15/2015 11:53:59 AM
SeaTools Test Code: D49A95C5
Identify - Started 3/15/2015 11:58:41 AM

My question is though my device is "behaving" perfectly, do I need to repair it for bad sectors or sort? Pls Help! Thank you in advance

Here are some more data:
--------------- SeaTools for Windows v1.2.0.10 ---------------
3/15/2015 11:26:03 AM
Unit Serial: NA0CPE9F
Unit Model: Seagate FreeAgent GoFlex
Model: ST1500LM003-9YH148
Serial Number: Z110ZHFB
Firmware Revision: CC9F
Short DST - Started 3/15/2015 11:26:03 AM
Short DST - FAIL 3/15/2015 11:26:05 AM
SeaTools Test Code: D49A95E5
Long Generic - Started 3/15/2015 11:27:01 AM
Long Generic - Started 3/15/2015 11:27:32 AM
Bad LBA: 1129402 Not Repaired
Bad LBA: 1129404 Not Repaired
Bad LBA: 1149080 Not Repaired
Bad LBA: 1149081 Not Repaired
Bad LBA: 1149082 Not Repaired
Bad LBA: 1149083 Not Repaired
Bad LBA: 1149084 Not Repaired
Bad LBA: 1149085 Not Repaired
Bad LBA: 1149086 Not Repaired
Bad LBA: 1149087 Not Repaired
Bad LBA: 1149096 Not Repaired
Bad LBA: 1149097 Not Repaired
Bad LBA: 1149098 Not Repaired
Bad LBA: 1149099 Not Repaired
Bad LBA: 1149100 Not Repaired
Bad LBA: 1149101 Not Repaired
Bad LBA: 1149102 Not Repaired
Bad LBA: 1149103 Not Repaired
Bad LBA: 5222504 Not Repaired
Bad LBA: 5222505 Not Repaired
Bad LBA: 5222506 Not Repaired
Bad LBA: 5222507 Not Repaired
Bad LBA: 5222508 Not Repaired
Bad LBA: 5222509 Not Repaired
Bad LBA: 5222510 Not Repaired
Bad LBA: 5222511 Not Repaired
Bad LBA: 5222512 Not Repaired
Bad LBA: 5222513 Not Repaired
Bad LBA: 5222514 Not Repaired
Bad LBA: 5222515 Not Repaired
Bad LBA: 5222516 Not Repaired
Bad LBA: 5222517 Not Repaired
Bad LBA: 5222518 Not Repaired
Bad LBA: 5222519 Not Repaired
Bad LBA: 5222520 Not Repaired
Bad LBA: 5222521 Not Repaired
Bad LBA: 5222522 Not Repaired
Bad LBA: 5222523 Not Repaired
Bad LBA: 5222524 Not Repaired
Bad LBA: 5222525 Not Repaired
Bad LBA: 5222526 Not Repaired
Bad LBA: 5222527 Not Repaired
Bad LBA: 5222528 Not Repaired
Bad LBA: 5222529 Not Repaired
Bad LBA: 5222530 Not Repaired
Bad LBA: 5222531 Not Repaired
Bad LBA: 5222532 Not Repaired
Bad LBA: 5222533 Not Repaired
Bad LBA: 5222534 Not Repaired
Bad LBA: 5222535 Not Repaired
Bad LBA: 5222536 Not Repaired
Bad LBA: 5222537 Not Repaired
Bad LBA: 5222538 Not Repaired
Bad LBA: 5222539 Not Repaired
Bad LBA: 5222540 Not Repaired
Bad LBA: 5222541 Not Repaired
Bad LBA: 5222542 Not Repaired
Bad LBA: 5222543 Not Repaired
Bad LBA: 5222544 Not Repaired
Bad LBA: 5222545 Not Repaired
Bad LBA: 5222546 Not Repaired
Bad LBA: 5222547 Not Repaired
Bad LBA: 5222548 Not Repaired
Bad LBA: 5222549 Not Repaired
Bad LBA: 5222550 Not Repaired
Bad LBA: 5222551 Not Repaired
Bad LBA: 5222552 Not Repaired
Bad LBA: 5222553 Not Repaired
Bad LBA: 5222554 Not Repaired
Bad LBA: 5222555 Not Repaired
Bad LBA: 5222556 Not Repaired
Bad LBA: 5222557 Not Repaired
Bad LBA: 5222558 Not Repaired
Bad LBA: 5222559 Not Repaired
Bad LBA: 5222560 Not Repaired
Bad LBA: 5222561 Not Repaired
Bad LBA: 5222562 Not Repaired
Bad LBA: 5222563 Not Repaired
Bad LBA: 5222564 Not Repaired
Bad LBA: 5222565 Not Repaired
Bad LBA: 5222566 Not Repaired
Bad LBA: 5222567 Not Repaired
Bad LBA: 5222568 Not Repaired
Bad LBA: 5222569 Not Repaired
Bad LBA: 5222570 Not Repaired
Bad LBA: 5222571 Not Repaired
Bad LBA: 5222572 Not Repaired
Bad LBA: 5222573 Not Repaired
Bad LBA: 5222574 Not Repaired
Bad LBA: 5222575 Not Repaired
Bad LBA: 5222576 Not Repaired
Bad LBA: 5222577 Not Repaired
Bad LBA: 5222578 Not Repaired
Bad LBA: 5222579 Not Repaired
Bad LBA: 5222580 Not Repaired
Bad LBA: 5222581 Not Repaired
Bad LBA: 5222582 Not Repaired
Bad LBA: 5222583 Not Repaired
Bad LBA: 5222584 Not Repaired
Bad LBA: 5222585 Not Repaired
Bad LBA: 5222586 Not Repaired
Bad LBA: 5222587 Not Repaired
Bad LBA: 5222588 Not Repaired
Bad LBA: 5222589 Not Repaired
Bad LBA: 5222590 Not Repaired
Bad LBA: 5222591 Not Repaired
Bad LBA: 5222592 Not Repaired
Bad LBA: 5222593 Not Repaired
Bad LBA: 5222594 Not Repaired
Bad LBA: 5222595 Not Repaired
Bad LBA: 5222596 Not Repaired
Bad LBA: 5222597 Not Repaired
Bad LBA: 5222598 Not Repaired
Bad LBA: 5222599 Not Repaired
Bad LBA: 5222600 Not Repaired
Bad LBA: 5222601 Not Repaired
Bad LBA: 5222602 Not Repaired
Bad LBA: 5222603 Not Repaired
Bad LBA: 5222604 Not Repaired
Bad LBA: 5222605 Not Repaired
Bad LBA: 5222606 Not Repaired
Bad LBA: 5222607 Not Repaired
Bad LBA: 5222608 Not Repaired
Bad LBA: 5222609 Not Repaired
Bad LBA: 5222610 Not Repaired
Bad LBA: 5222611 Not Repaired
Bad LBA: 5222612 Not Repaired
Bad LBA: 5222613 Not Repaired
Bad LBA: 5222614 Not Repaired
Bad LBA: 5222615 Not Repaired
Bad LBA: 5222616 Not Repaired
Bad LBA: 5222617 Not Repaired
Bad LBA: 5222618 Not Repaired
Bad LBA: 5222619 Not Repaired
Bad LBA: 5222620 Not Repaired
Bad LBA: 5222621 Not Repaired
Bad LBA: 5222622 Not Repaired
Bad LBA: 5222623 Not Repaired
Bad LBA: 5222624 Not Repaired
Bad LBA: 5222625 Not Repaired
Bad LBA: 5222626 Not Repaired
Bad LBA: 5222627 Not Repaired
Bad LBA: 5222628 Not Repaired
Bad LBA: 5222629 Not Repaired
Bad LBA: 5222630 Not Repaired
Bad LBA: 5222631 Not Repaired
Bad LBA: 5222632 Not Repaired
Bad LBA: 5222633 Not Repaired
Bad LBA: 5222634 Not Repaired
Bad LBA: 5222635 Not Repaired
Bad LBA: 5222636 Not Repaired
Bad LBA: 5222637 Not Repaired
Bad LBA: 5222638 Not Repaired
Bad LBA: 5222639 Not Repaired
Bad LBA: 5222640 Not Repaired
Bad LBA: 5222641 Not Repaired
Bad LBA: 5222642 Not Repaired
Bad LBA: 5222643 Not Repaired
Bad LBA: 5222644 Not Repaired
Bad LBA: 5222645 Not Repaired
Bad LBA: 5222646 Not Repaired
Bad LBA: 5222647 Not Repaired
Bad LBA: 5222648 Not Repaired
Bad LBA: 5222649 Not Repaired
Bad LBA: 5222650 Not Repaired
Bad LBA: 5222651 Not Repaired
Bad LBA: 5222652 Not Repaired
Bad LBA: 5222653 Not Repaired
Bad LBA: 5222654 Not Repaired
Bad LBA: 5222655 Not Repaired
Bad LBA: 5222656 Not Repaired
Bad LBA: 5222657 Not Repaired
Bad LBA: 5222658 Not Repaired
Bad LBA: 5222659 Not Repaired
Bad LBA: 5222660 Not Repaired
Bad LBA: 5222661 Not Repaired
Bad LBA: 5222662 Not Repaired
Bad LBA: 5222663 Not Repaired
Bad LBA: 5222664 Not Repaired
Bad LBA: 5222665 Not Repaired
Bad LBA: 5222666 Not Repaired
Bad LBA: 5222667 Not Repaired
Bad LBA: 5222668 Not Repaired
Bad LBA: 5222669 Not Repaired
Bad LBA: 5222670 Not Repaired
Bad LBA: 5222671 Not Repaired
Bad LBA: 5222672 Not Repaired
Bad LBA: 5222673 Not Repaired
Bad LBA: 5222674 Not Repaired
Bad LBA: 5222675 Not Repaired
Bad LBA: 5222676 Not Repaired
Bad LBA: 5222677 Not Repaired
Bad LBA: 5222678 Not Repaired
Bad LBA: 5222679 Not Repaired
Bad LBA: 5222680 Not Repaired
Bad LBA: 5222681 Not Repaired
Bad LBA: 5222682 Not Repaired
Bad LBA: 5222683 Not Repaired
Bad LBA: 5222684 Not Repaired
Bad LBA: 5222685 Not Repaired
Long Generic - FAIL 3/15/2015 11:30:51 AM
SeaTools Test Code: D49A95D5
Identify - Started 3/15/2015 11:32:02 AM
Short DST - Started 3/15/2015 11:53:28 AM
Short DST - FAIL 3/15/2015 11:53:30 AM
SeaTools Test Code: D49A95E5
Short Generic - Started 3/15/2015 11:53:40 AM
Short Generic - FAIL 3/15/2015 11:53:59 AM
SeaTools Test Code: D49A95C5
Identify - Started 3/15/2015 11:58:41 AM
Model:
Serial Number:
SMART: Not Supported
48-bit Address feature set supported: False
Max LBA: 2930277168
Host Protected Area features: Not Supported
Mandatory Power Management: Not Supported
Security Mode: Not Supported
SET MAX security extension: Not Supported
Advanced Power Management: Not Supported
Download Firmware: False
SMART self-test supported: False
SMART error logging supported: False
Drive Temperature(C/F): 0/32
Power-On Hours: 0