Seagate ST9500420AS Momentus 7200.4 SATA Product Manual - Page 34

Word 27-46 47 48 49 50 51 52 53 54 55 56 57-58 59 60-61 62 63 64 65 66 67 68 69-74 75 Description Drive model number: (40 ASCII characters, padded with blanks to end of string) (Bits 7-0) Maximum sectors per interrupt on Read multiple and Write multiple (16) Reserved Standard Standby timer, IORDY supported and may be disabled ATA-reserved PIO data-transfer cycle timing mode Retired Words 54-58, 64-70 and 88 are valid Number of current logical cylinders Number of current logical heads Number of current logical sectors per logical track Current capacity in sectors Number of sectors transferred during a Read Multiple or Write Multiple command Total number of user-addressable sectors This field contains a value that is one greater than the total number of user-addressable sectors. The maximum value that shall be placed in this field is 0FFFFFFFh. The 0FFFFFFFh value applies to all capacities over 137Gbytes (see Section 2.2 and 2.3 for related information). Retired Multiword DMA active and modes supported (see note following this table) Advanced PIO modes supported (modes 3 and 4 supported) Minimum multiword DMA transfer cycle time per word (120 nsec) Recommended multiword DMA transfer cycle time per word (120 nsec) Minimum PIO cycle time without IORDY flow control (240 nsec) Minimum PIO cycle time with IORDY flow control (120 nsec) ATA-reserved Queue depth Value ST9500420AS ST9500420ASG ST9320423AS ST9320423ASG ST9250410AS ST9250410ASG ST9160412AS ST9160412ASG ST9120410AS ST9120410ASG 8010H 0000H 2F00H 0000H 0200H 0200H 0007H xxxxH xxxxH xxxxH xxxxH xxxxH ST9500420AS = 0FFFFFFFh ST9500420ASG = 0FFFFFFFh ST9320423AS = 0FFFFFFFh ST9320423ASG = 0FFFFFFFh ST9250410AS = 0FFFFFFFh ST9250410ASG = 0FFFFFFFh ST9160412AS = 0FFFFFFFh ST9160412ASG = 0FFFFFFFh ST9120410AS = 234,441,648 ST9120410ASG = 234,441,648 0000H xx07H 0003H 0078H 0078H 00F0H 0078H 0000H 0000H 28 Momentus 7200.4 SATA Product Manual, Rev. A