These shadow sections show an important fact that in the process of RAID 5 recovery, if there appear any bad sectors, RAID 5 data will be half-baked and it may cause some data to be damaged, or severe damage to the system, depending on the location of "shadow sections".
Because RAID 6 can recover the lost data even when two hard disks are damaged, recovering the damaged hard disk will not be affected if there are bad sector(s) in other hard disk(s); however, if there are more than 2 bad sectors occurring in the same horizontal section, RAID 6 will meet same problem as RAID 5, but the potential is extremely low.
On magnetic storage disks, particle contamination can result in read-write errors, bad sectors
, and total disk failure.
Manufacturers of hard disks add extra space to their disks and "lock out" the faulty areas, technically known as "bad sectors
," thereby giving you the size you paid for.
The product also offers a diagnostic option that tests drives and diagnoses bad sectors
. It positions the first handheld disk drive duplication system as a complete tool for the IS professional in the educational, government, law enforcement and corporate markets, as well as for individual users.
The cloned data adds a layer of safety to the processes of recovering drives that have bad sectors
, recovering files that have been damaged and need to be restored, and performing a forensic analysis on a drive.
Symptoms of a hard drive crash can include clicking noises, inaccessible data, bad sectors
, logic board failures, firmware corruption, or the hard drive appearing empty to the operating system.
Both adapter families incorporate ADS[TM], while ExpressSAS RAID cards come standard with DriveAssure[TM], a technology which monitors the response time of slow drives and searches for and repairs bad sectors
extending the life of drives by allowing them to run longer, faster and smoother while preventing premature drive failures.