Now You Lot Know Analysis Of Difficult Disk Bad Sector - Operate 4/5

2. b. Bad sectors expanded has an regional pattern

Bad sectors regional pattern is very difficult to repair, because of bad sectors is a really wide area. Bad sectors expanded has an regional pattern, convey two types :

1. Bad sectors which is non accessible (can non read)

2. Bad sectors which can last accessed

1. Bad sectors which is non accessible (can non read)
Bad sectors which is non accessible because at that spot is a really severe bad sectors. Because many sectors that tin non be read on the disk. If this employment occurs, there volition last a SMART Failure Predicted on Hard Disk.

If we make a partition C = 50GB, D = 100GB, 100GB unallocation space. When done install a fresh copy of operating system, system can non function normally, and work hard disks are really slow. Low Level Format, can non repair SMART Failure.

Hard disk above, having SMART Failure Predicted on Hard Disk. So, one argue for the SMART failure is, there are sectors in the disk is unreadable. 

Process of SMART Failure Predicted on Hard Disk

Picture No.1 : Bad sectors beginning at LBA 321 500 268 position

Picture No.2 : Because of bad sectors is non repaired, bad sectors will extend to end sectors

Picture No.3a : SMART Failure Predicted on Hard Disk 

Picture No.3b : When done check disk, found that sectors can non last read.

2. Bad sectors which can last accessed

Bad sectors which can last accessed. There are 2 possibilities, information tin last recovered nether normal conditions, too information tin last recovered inwards a damaged condition

 See the painting below. Scale image HD Tune

Scale Legend
1 block = xv MB
1 block = 15,000,000 bytes
1 block = 15000000/512 = 29297 sectors

Scale Damage Blocks

Total block = l x l = 2500 block (vertical x horizontal)
Green block = 805 blocks
Red block = 1695 block
Damaged block = (1695 : 2500) x 100% = 67.8 %
 

If inwards i block (15 MB = 29297 sectors), at that spot are one or to a greater extent than bad sectors, block inwards the hard disk Tune volition last colored cherry

Based on higher upward analysis, it tin last concluded:

1. Damage blocks = 67.8%, does non hateful at that spot is harm to sectors, roofing 67.8%
2. Damage blocks (red), non all sectors damage.
3. Damage blocks (red), information tin last saved, inwards a normal condition/damaged.
4. Damage blocks (red), does non hateful at that spot is harm inwards sector ....... until destination sector.
5. Damage blocks (red), agency that at that spot are bad sectors really unopen intervals. (Bad sectors the which tin last accessed).
6. Damage block (gray), agency that at that spot are bad sectors of ....... sectors until destination sectors. Bad sectors which is non accessible (can non read)

SMART Failure Predicted on Hard Disk, is a warning if the hard disk damage is very severe. SMART Failure process, tin read here Analysis of Hard Disk Bad Sector - Part 5/5

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