Re: [CentOS] OT - Offline uncorrectable sectors

William L. Maltby ha scritto:

Yep. Only a few copies of the superblock and the i-node tables are written by the file system make process. That's why it's important for files systems in critical applications to be created with the check forced. Folks should also keep in mind that the default check, read only, is really not sufficient for critical situations. The full write/read check should be forced on *new* partitions/disks.

So again my question is: can I use dd to "test" the disk? what about

dd if=/dev/sda of=/dev/sda bs=512

Is this safe on a full running system? Has to be done at runlevel 1 or with a live cd? I think this is "better" than the manufactureur way, as dd is always present and works with any brand.

Lorenzo