Can I use ADDS to shield bad blocks?

If you just want to mark the bad sectors, why don't you run chkdsk /r on the partition?

DD isn't going to protect you from bad sectors or a failing drive. If the bad sector count continues to increase you should replace the drive -- it's not going to get better and could fail. Hopefully, you have current backups.

Thank you, MudCrab.
Changing a new hard disk would be a best way, but as the current one 1.5TB WD is still half empty, I wanna use it till it is full.
I guess there is bad sector's location in the report, but I really don't know how to read that and, don't you know any program to shield bad sectors?
Thanks.

You need to run chkdsk /r on the partition. This will mark the bad sectors so they don't get used. For example, if your partition is J:, you would run a Command Prompt, type chkdsk J: /r at the prompt and press ENTER. Windows may say it will sechedule it to be run on the next reboot if it can't process it while Windows is running.

The problem with drives that start having bad sectors show up is that they are failing and have been for some time. The drive has spare sectors that it uses to replace bad sectors. This happens automatically and you aren't normally aware of it. When you start seeing sector errors in normal use the drive has used up all of the spare sectors.

Usually, when a drive gets to this state the increase in bad sectors keeps going. You would need to check for bad sectors daily/weekly and see if they continue increasing. If they don't then the drive may still last a while. Make sure you have backups of any important data on the drive in case it fails or a sector goes bad on an important file.

If the drive is still under warranty, you may be able to have it replaced.

Thanks, I see now.
I check through Chinese internet and find some method that maybe useful to continue using this disk with some loss of capacity.
1. backup data on problem drive.
2. use diskgen to locate the bad sectors, BADSECT.TXT will record info. on bad sectors.
3. delete that drive with problem sectors, create 2 or 3 drives, one of them containing bad sectors with 10-20mb more space on both sides, then hide this dirve.
it's a pity that ADDS won't have info. on bad sectors so I need to run diskgen additionally.

Would you have any comment?

Have it changed with a new hard disk maybe the best way, for bad sectors emerge in another drive today.
What brand and type hard disk would you suggest, Mudcrab?
Thank you.

I really couldn't say. The last few times I've purchased new hard drives they were WD and Seagate. Both brands had problems. The WD wouldn't work where I installed it so I ended up moving it to another computer. One of the Seagate drives failed and had to be replaced via warranty. I suspect another Seagate is going to fail before long since it's started clicking. I tried the WD drives because I was having problems with Seagate, but when the WD drive had problems I switched back.

I normally just look for the cost, specs, and a three or five year warranty. It seems that most current drives just don't hold up as well as the older ones.

Thanks a lot, Mud!