I'm having problems with one of my external hdd, I started noticing problems with it when I was transfering files where at the beginning of the transfer it was the normal speed then about half way through it slowed down pretty bad, about 10 times slower. So I did a diagnostic using CrystalDiskInfo and I have these caution messages in bold:
Does anyone know how to fix this? If it's even posssible?
I need to recover some data from another of my external hdd, do you think there might be a temporary fix so I could use this hdd temporarily just to transfer data to it so I can transfer it back to my other hdd?
You can find the answer here: http://forums.whirlpool.net.au/archive/1480430
if not than move all files from that HDD to another HDD/storage than do a full format(not a quick) do full format so all sector get format as well instead of just cleaning the space...
Open a cmpd prompt, Run chkdsk /F (F= Check disk for errors) OR
Chkdsk /R (R= Locates bad sectors and reovers readable information)
D3 = 211 sectors (108,320 Bytes). These sectors were found bad and remapped to the "reserve" area of the Drive.
HDDs are manuf with a "reserve area". This is very few HDDs are perfect and initially the drive is tested and any bad sectors are remapped to this reserved area and the drive has the specified size. When the user put the drive into use and then develops additional bad sectors they can then be remapped.
A HDD sector also contains alignment data and when a write has troble with a sector it will attempt to Rewite the data (hense the slow down).
When you do the "Full" Format each sector is tested, if it has a problem with the sector it will attempt to correct it by adjusting the alignment of the sector, if this does not fix it it is then marked BAD and relocated (mapped) to the reserve area. Once the reserved area has been used, you will then start to see the drive size shrink.
There should be a program that will do this without doing a full format. If a bad sector that has data on it, it will attempt to relocate the data, mark the sector as bad. It should notify you which file that is effect as you will have to check that file to make sure it was not corrupted. (ie Chkdsk).
If you continue to find additional bad sectors - BACKUP the Drive and REPLACE!!!