C]Net reports that IBM has quietly issued a patch to fix a problem with Hitachi hard disks on some of its ThinkPad models.

The problem affects ThinkPad models R50, R50p, T41, T41p that have the Hitachi 60GB 7200 rpm hard disk drive, model HTS726060M9AT00 with ASM part number 92P6550 and FRU part number 92P6551.