I can't get it to access my WD My Book?

There was an unintended SHUT-DOWN and since that I've check the DISK UTILITY and I get this info.

FIRST HARD DRIVE

Verifying volume “Macintosh HD”

Checking HFS Plus volume.

Checking Extents Overflow file.

Checking Catalog file.

Illegal name

Illegal name

Checking multi-linked files.

Checking Catalog hierarchy.

%)

Checking Extended Attributes file.

Checking volume bitmap.

Checking volume information.

The volume Macintosh HD needs to be repaired.

Error: The underlying task reported failure on exit

1 HFS volume checked

Volume needs repair

SECOND HARD DRIVE

Verifying volume “Macintosh HD”

Checking HFS Plus volume.

Checking Extents Overflow file.

Checking Catalog file.

Illegal name

Illegal name

Checking multi-linked files.

Checking multi-linked files.

g Catalog hierarchy.",0)

Checking Extended Attributes file.

Checking volume bitmap.

Checking volume information.

ed.",1)

Macintosh HD

Error: The underlying task reported failure on exit

1 HFS volume checked

Volume needs repair

WHAT CAN I POSSIBLY DO TO FIX IT?

Armando.