Western Digital ATA100 40.0GB WD400JB Hard Drive Western Digital ATA100 40.0GB WD400JB Pictures × Previous Next SpecificationsCapacity 40 GBInterface ATA100 RPM: 7200 Cache: 8 MB Read Seek: 8.9 ms Write Seek: 10.9 ms Latency: 4.2 ms ManufacturerSpecifications