hddgorilla wrote:
mediaman wrote:
i'll take a newbie guess at helping, feel free to shoot me when i'm wrong:
I assume "green blocks" are what MHDD is showing you, readable but slowish.
"healing" as I understand will just move these blocks to the Plist so as to "hide" them. Those blocks won't re-appear unless you flush the list (that won't happen by it self)
what will happen is that more duff blocks will appear as time goes on.
If you doubt the disk why put important data on it? use it as a backup of backups, in a second location, and buy a new one.
shoot away
Hi mediaman.
Yes, green blocks are just slow blocks.
No, as I understand it, when I secure-erased the disk, these slow sectors were not hidden. Just got faster. I am asking if they will eventually get slower again.
Yes, if I don't return it, I will use it as backup, at least at the beginning.
Buy a new drive? No, I don't have money for another new drive.
Hi for all!
Healing the slow block in mhdd is only mean overwrite its contents to new one (like zero).
It is a destructive option, don't use it on important data filled drive!!!This procedure refresh the contents, and the block have 2 choice:
1. be faster again
2. be UNC(orrectable). If the remap is ON, the drive can "hide" this block, reallocate it. (goes to G-list).
The slowness caused by hyperparamagnetic effect.
The corruption can be corrected by ECC circuit in the pcb, but takes more time.
Additionally sometimes the corrector code try to read again and again, try to read a little off-track.
This causes the slowness, sometimes make strange noises as well.
If the content is rewritten, the block can be correctly readable again.
If the part of the surface is weaker than the others, the slowness will come again sooner or later....
Regards,
Janos