The UBE -LRB- Unrecoverable Bit Error -RRB- rate is typically specified at NUMBER@1 bit in NUMBER@2 for enterprise class disk drives -LRB- SCSI , ORGANIZATION@1 , ORGANIZATION@2 -RRB- , and NUMBER@1 bit in NUMBER@3 for desktop class disk drives -LRB- IDE/ATA/PATA , SATA -RRB- .

This happens at about NUMBER@1 bit in NUMBER@2 in enterprise-class disk drives , and NUMBER@1 bit in NUMBER@3 in ordinary disk drives .
