Re: 2.6.26-rc1 ata2 problems????

[Rik van Riel <riel@xxxxxxxxxxx>]

On Sat, 24 May 2008 23:45:24 +0800
"Peter Teoh" <htmldeveloper@xxxxxxxxx> wrote:

> Just out of curiosity.....when OS build the list of inodes....it scan
> and identify all the corrupted blocks, and so the outcome of mkfs will
> be all the uncorrupted blocks on the harddisk - right?  

No, mkfs just writes and hopes that the blocks it wrote
can be read in again later. I do not believe it does any
testing by default.

> so possibly there are many other corrupted blocks on the harddisk

Yes.

> Is there any tools that can allow me to see / identify all these
> corrupted blocks?

badblocks

Read the man page carefully, you probably want the "-n" option.
 
> And given that there are many corrupted blocks, when I do a mkfs to
> create a new filesystem, all the corrupted blocks will be marked away,
> and therefore the new filesystem should have less total space, but
> guaranteed NOT TO HAVE any corrupted blocks, right?

No, mkfs does not scan the disk for bad blocks by default.

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