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....10 Address Offset Feature (Vendor Specific 79 12.11 Seek Overlap ...80 12.12 Write Cache Function ...80 12.13 Reassign Function ...81 12.14 48-bit Address Feature Set... 14.24 Read Verify Sector(s) EXT (42h)...132 14.25 Recalibrate (1xh)...133 4/188 Travelstar 5K160 (PATA) Hard Disk Drive Specification 9 DEVIATIONS FROM STANDARD ...57 10 PHYSICAL INTERFACE ...57 11 REGISTERS ...58 11.1 ...11.5 Drive Address Register ...59 11.6 Device Register ...59 11.7 Error Register ...60 11.8 Features Register ...60 11.9 LBA High Register ...60 11.10 LBA Low Register ...60 11.11 LBA Mid Register...60 11...
....10 Address Offset Feature (Vendor Specific 79 12.11 Seek Overlap ...80 12.12 Write Cache Function ...80 12.13 Reassign Function ...81 12.14 48-bit Address Feature Set... 14.24 Read Verify Sector(s) EXT (42h)...132 14.25 Recalibrate (1xh)...133 4/188 Travelstar 5K160 (PATA) Hard Disk Drive Specification 9 DEVIATIONS FROM STANDARD ...57 10 PHYSICAL INTERFACE ...57 11 REGISTERS ...58 11.1 ...11.5 Drive Address Register ...59 11.6 Device Register ...59 11.7 Error Register ...60 11.8 Features Register ...60 11.9 LBA High Register ...60 11.10 LBA Low Register ...60 11.11 LBA Mid Register...60 11...
Specifications
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Travelstar 5K160 (PATA) Hard Disk Drive Specification List of temperature and humidity...24 Figure 2. Limits of Figures Figure ...Set Feature 79 Figure 37 Seek overlap...80 Figure 38 Command set ...90 Figure 39 Command Set - Continued 106 Figure 55 Identify device information --- System reset timings...42 Figure 5. Drive address setting ...53 Figure 16 Register Set...Status Register ...58 Figure 18 Device Control Register ...59 Figure 19 Drive Address Register...59 Figure 20 Device Register...59 Figure 21 Error Register...60 Figure 22 Status Register ...61 Figure 23 Reset Response Table...62 ...
Travelstar 5K160 (PATA) Hard Disk Drive Specification List of temperature and humidity...24 Figure 2. Limits of Figures Figure ...Set Feature 79 Figure 37 Seek overlap...80 Figure 38 Command set ...90 Figure 39 Command Set - Continued 106 Figure 55 Identify device information --- System reset timings...42 Figure 5. Drive address setting ...53 Figure 16 Register Set...Status Register ...58 Figure 18 Device Control Register ...59 Figure 19 Drive Address Register...59 Figure 20 Device Register...59 Figure 21 Error Register...60 Figure 22 Status Register ...61 Figure 23 Reset Response Table...62 ...
Specifications
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...Command (E2h/96h) ...165 Figure 120 Standby Immediate Command (E0h/94h 166 Figure 121 Write Buffer Command (E8h)...167 7/188 Travelstar 5K160 (PATA) Hard Disk Drive Specification Figure 60 Number of cylinders/heads/sectors by models for HTS5416XXJ9AT00 112 Figure 61 Idle Command (E3h/97h) ...113 Figure 62 Idle Immediate ...Figure 77 Read Multiple Command (C4h) ...125 Figure 78 Read Multiple EXT (29h)...126 Figure 79 Read Native Max ADDRESS (F8h)...127 Figure 80 Read Native Max ADDRESS EXT (29h 128 Figure 81 Read Sector(s) Command (20h/21h 129 Figure 82 Read Sector(s) EXT Command (24h 130...
...Command (E2h/96h) ...165 Figure 120 Standby Immediate Command (E0h/94h 166 Figure 121 Write Buffer Command (E8h)...167 7/188 Travelstar 5K160 (PATA) Hard Disk Drive Specification Figure 60 Number of cylinders/heads/sectors by models for HTS5416XXJ9AT00 112 Figure 61 Idle Command (E3h/97h) ...113 Figure 62 Idle Immediate ...Figure 77 Read Multiple Command (C4h) ...125 Figure 78 Read Multiple EXT (29h)...126 Figure 79 Read Native Max ADDRESS (F8h)...127 Figure 80 Read Native Max ADDRESS EXT (29h 128 Figure 81 Read Sector(s) Command (20h/21h 129 Figure 82 Read Sector(s) EXT Command (24h 130...
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... page 7 defines the hardware functional specification. General Travelstar 5K160 (PATA) Hard Disk Drive Specification 1 Introduction This document describes the specifications of the Hitachi Travelstar 5K160, a 2.5-inch hard disk drive with ATA/IDE interface: Drive name Travelstar 5K160-160 Travelstar 5K160-120 Travelstar 5K160-80 Travelstar 5K160-60 Travelstar 5K160-40 Model Number HTS541616J9AT00 HTS541612J9AT00 HTS541680J9AT00 HTS541660J9AT00 HTS541640J9AT00 Capacity (GB) 160 120 80 60 40 Height (mm) 9.5 9.5 9.5 9.5 9.5 Rotation speed (rpm...
... page 7 defines the hardware functional specification. General Travelstar 5K160 (PATA) Hard Disk Drive Specification 1 Introduction This document describes the specifications of the Hitachi Travelstar 5K160, a 2.5-inch hard disk drive with ATA/IDE interface: Drive name Travelstar 5K160-160 Travelstar 5K160-120 Travelstar 5K160-80 Travelstar 5K160-60 Travelstar 5K160-40 Model Number HTS541616J9AT00 HTS541612J9AT00 HTS541680J9AT00 HTS541660J9AT00 HTS541640J9AT00 Capacity (GB) 160 120 80 60 40 Height (mm) 9.5 9.5 9.5 9.5 9.5 Rotation speed (rpm...
Specifications
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Travelstar 5K160 (PATA) Hard Disk Drive Specification 2 Outline of the drive 2.5-inch, 9.5-mm Height Perpendicular Recording Formatted capacities of 160GB,120GB, 80GB, 60GB and 40GB 512 bytes/sector AT Interface (Enhanced IDE) conforming to ready 3.5 sec ... Mb/s Average seek time: 11 ms for read Closed-loop actuator servo (Embedded Sector Servo) Rotary voice coil motor actuator Load/Unload mechanism Mechanical latch 0.60 Watts at idle state Power on to ATA/ATAPI-7 Integrated controller No-ID recording format Coding : 100/106 Multi zone recording Enhanced ECC 10 bit...
Travelstar 5K160 (PATA) Hard Disk Drive Specification 2 Outline of the drive 2.5-inch, 9.5-mm Height Perpendicular Recording Formatted capacities of 160GB,120GB, 80GB, 60GB and 40GB 512 bytes/sector AT Interface (Enhanced IDE) conforming to ready 3.5 sec ... Mb/s Average seek time: 11 ms for read Closed-loop actuator servo (Embedded Sector Servo) Rotary voice coil motor actuator Load/Unload mechanism Mechanical latch 0.60 Watts at idle state Power on to ATA/ATAPI-7 Integrated controller No-ID recording format Coding : 100/106 Multi zone recording Enhanced ECC 10 bit...
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... Description HTS541680J9AT00 Physical Layout Bytes per Sector Sectors per Track 512 480-1272 Number of Heads 2 Number of Disks 1 Logical Layout Number of Heads 16 Number of Sectors/ Track Number of Cylinders Number of zones Table 2. Travelstar 5K160 (PATA) Hard Disk Drive Specification 4 Drive characteristics ...4.1 Formatted capacity by model number. Max) Number of Sectors 63 16,383 156,301,488 Total Logical Data Bytes 80,026,361,856 Table 1. HTS541660J9AT00 512 480-1272 2 1 16 63 16,383 117,210,240 60,011,642,880...
... Description HTS541680J9AT00 Physical Layout Bytes per Sector Sectors per Track 512 480-1272 Number of Heads 2 Number of Disks 1 Logical Layout Number of Heads 16 Number of Sectors/ Track Number of Cylinders Number of zones Table 2. Travelstar 5K160 (PATA) Hard Disk Drive Specification 4 Drive characteristics ...4.1 Formatted capacity by model number. Max) Number of Sectors 63 16,383 156,301,488 Total Logical Data Bytes 80,026,361,856 Table 1. HTS541660J9AT00 512 480-1272 2 1 16 63 16,383 117,210,240 60,011,642,880...
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...80 70 60 Non Operating 50 Operating 40 30 20 10 0 -45 -35 -25 -15 -5 5 15 25 35 45 55 65 Temperature (degC) Figure 1. The maximum storage period in the shipping package is responsible for providing sufficient air movement to maintain surface temperatures below 60...condition 5 to 55°C (See note below 63°C at the center of temperature and humidity 24/188 Travelstar 5K160 (PATA) Hard Disk Drive Specification 6 Specification 6.1 Environment 6.1.1 Temperature and humidity Operating conditions Temperature Relative humidity Maximum wet bulb temperature Maximum temperature ...
...80 70 60 Non Operating 50 Operating 40 30 20 10 0 -45 -35 -25 -15 -5 5 15 25 35 45 55 65 Temperature (degC) Figure 1. The maximum storage period in the shipping package is responsible for providing sufficient air movement to maintain surface temperatures below 60...condition 5 to 55°C (See note below 63°C at the center of temperature and humidity 24/188 Travelstar 5K160 (PATA) Hard Disk Drive Specification 6 Specification 6.1 Environment 6.1.1 Temperature and humidity Operating conditions Temperature Relative humidity Maximum wet bulb temperature Maximum temperature ...
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Travelstar 5K160 (PATA) Hard Disk Drive Specification 6.1.2 Corrosion test The hard disk drive must be functional and show no signs of corrosion after being exposed to a temperature humidity stress of 50°C/90%RH (relative humidity) for one week followed by a temperature and humidity drop to 25'C/40%RH in 2 hours. 6.1.3 Radiation noise The disk drive... two of the mounting screw holes of the drive when an AC current of the soft error rate under the following magnetic flux density limits at the enclosure surface. Frequency (KHz) Limits (uT RMS) 0-60 500 61-100 250 101-200 100 201-...
Travelstar 5K160 (PATA) Hard Disk Drive Specification 6.1.2 Corrosion test The hard disk drive must be functional and show no signs of corrosion after being exposed to a temperature humidity stress of 50°C/90%RH (relative humidity) for one week followed by a temperature and humidity drop to 25'C/40%RH in 2 hours. 6.1.3 Radiation noise The disk drive... two of the mounting screw holes of the drive when an AC current of the soft error rate under the following magnetic flux density limits at the enclosure surface. Frequency (KHz) Limits (uT RMS) 0-60 500 61-100 250 101-200 100 201-...
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...;0.25 6.4.2 Mounting hole locations The mounting hole locations and size of the drive are included in section 7.10, "Drive address setting" on page 41. 30/188 Model Height (mm) 160 GB, 120 GB models 9.5±0.2 80 GB, 60 GB, 40 GB models 9.5±0.2 Table 15. Travelstar 5K160 (PATA) Hard Disk Drive Specification 6.4 Mechanical specifications 6.4.1 Physical dimensions and weight The following figure lists...
...;0.25 6.4.2 Mounting hole locations The mounting hole locations and size of the drive are included in section 7.10, "Drive address setting" on page 41. 30/188 Model Height (mm) 160 GB, 120 GB models 9.5±0.2 80 GB, 60 GB, 40 GB models 9.5±0.2 Table 15. Travelstar 5K160 (PATA) Hard Disk Drive Specification 6.4 Mechanical specifications 6.4.1 Physical dimensions and weight The following figure lists...
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...Duration of 2 ms 3185 m/sec2 (325 G) The input level shall be a minimum delay of 3 seconds between shock pulses. 6.5.6 6.5.7 Travelstar 5K160 (PATA) Hard Disk Drive Specification Swept sine vibration 49 m/ sec2 (5 G) (zero-to-peak), 5 to 500 to 10 Hz sine wave 0.5 oct/min sweep ...drive withstands the following half-sine shock pulse without a hard error while subjected to 5 Hz Operating shock The hard disk drive meets the criteria in the table below while operating under these conditions: The shock test consists of 10 shock inputs in each direction of the drive for a total of 60...
...Duration of 2 ms 3185 m/sec2 (325 G) The input level shall be a minimum delay of 3 seconds between shock pulses. 6.5.6 6.5.7 Travelstar 5K160 (PATA) Hard Disk Drive Specification Swept sine vibration 49 m/ sec2 (5 G) (zero-to-peak), 5 to 500 to 10 Hz sine wave 0.5 oct/min sweep ...drive withstands the following half-sine shock pulse without a hard error while subjected to 5 Hz Operating shock The hard disk drive meets the criteria in the table below while operating under these conditions: The shock test consists of 10 shock inputs in each direction of the drive for a total of 60...
Specifications
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...ns) (ns) (ns) (ns) (ns) (ns) tSR DSTROBE to - 75 - 70 - 60 final DSTROBE time Figure 8. to - 50 - 30 - 20 HDMARDY- 7.9.2 Travelstar 5K160 (PATA) Hard Disk Drive Specification Host Pausing Read DMA DMARQ DMACK- Ultra DMA cycle timings (Host Pausing Read) MODE3 MIN MAX ...(ns) (ns) - - - 60 MODE4 MIN MAX (ns) (ns) - - - 60 MODE5 MIN MAX (ns) (ns) - - - 50 Note...
...ns) (ns) (ns) (ns) (ns) (ns) tSR DSTROBE to - 75 - 70 - 60 final DSTROBE time Figure 8. to - 50 - 30 - 20 HDMARDY- 7.9.2 Travelstar 5K160 (PATA) Hard Disk Drive Specification Host Pausing Read DMA DMARQ DMACK- Ultra DMA cycle timings (Host Pausing Read) MODE3 MIN MAX ...(ns) (ns) - - - 60 MODE4 MIN MAX (ns) (ns) - - - 60 MODE5 MIN MAX (ns) (ns) - - - 50 Note...
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...20 - 20 - 20 before releasing IORDY Figure 9. time at device tACK Hold time 20 - 20 - 20 - DMACK- 7.9.3 Travelstar 5K160 (PATA) Hard Disk Drive Specification Host Terminating Read DMA DMARQ tLI tMLI DMACKtRP tACK STOP tACK HDMARDYDSTROBE DD(15:0) tRFS tLI tIORDYZ tDH tAZ tDS xxx RD ... output tMLI Interlock time 20 - 20 - 20 - Ultra DMA cycle timings (Host Terminating Read) MODE 3 MIN MAX (ns) (ns) - 60 100 - 0 100 - 10 20 - 20 - 7 - 5 - 20 - - 20 MODE 4 MIN MAX (ns) (ns) - 60 100 - 0 100 - 10 20 - 20 - 5 - 5 - 20 - - 20 MODE5 MIN MAX (ns) (ns) - 50 85 - ...
...20 - 20 - 20 before releasing IORDY Figure 9. time at device tACK Hold time 20 - 20 - 20 - DMACK- 7.9.3 Travelstar 5K160 (PATA) Hard Disk Drive Specification Host Terminating Read DMA DMARQ tLI tMLI DMACKtRP tACK STOP tACK HDMARDYDSTROBE DD(15:0) tRFS tLI tIORDYZ tDH tAZ tDS xxx RD ... output tMLI Interlock time 20 - 20 - 20 - Ultra DMA cycle timings (Host Terminating Read) MODE 3 MIN MAX (ns) (ns) - 60 100 - 0 100 - 10 20 - 20 - 7 - 5 - 20 - - 20 MODE 4 MIN MAX (ns) (ns) - 60 100 - 0 100 - 10 20 - 20 - 5 - 5 - 20 - - 20 MODE5 MIN MAX (ns) (ns) - 50 85 - ...
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... MODE0 MODE1 MODE2 DESCRIPTION MIN MAX MIN MAX MIN MAX (ns) (ns) (ns) (ns) (ns) (ns) tSR HSTROBE to - 75 - 70 - 60 final HSTROBE time Figure 12. 7.9.6 Travelstar 5K160 (PATA) Hard Disk Drive Specification Device Pausing Write DMA DMARQ DMACK- is ready to receive two more data words after DDMARDY- Ultra DMA cycle timings...
... MODE0 MODE1 MODE2 DESCRIPTION MIN MAX MIN MAX MIN MAX (ns) (ns) (ns) (ns) (ns) (ns) tSR HSTROBE to - 75 - 70 - 60 final HSTROBE time Figure 12. 7.9.6 Travelstar 5K160 (PATA) Hard Disk Drive Specification Device Pausing Write DMA DMARQ DMACK- is ready to receive two more data words after DDMARDY- Ultra DMA cycle timings...
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...10 - 7 - time at device tDH CRC word hold 5 - 5 - 5 - Ultra DMA cycle timings (Device Terminating Write) MODE3 MIN MAX (ns) (ns) - 60 100 - 0 100 20 - 7 - 5 - 20 - - 20 MODE4 MIN MAX (ns) (ns) - 60 100 - 0 100 20 - 5 - 5 - 20 - - 20 MODE5 MIN MAX (ns) (ns) - 50 85 - 0 75 20 - 4 - 4.6 ...for 20 - 20 - 20 - negation tIORDYZ Maximum time - 20 - 20 - 20 before releasing IORDY Figure 13. 7.9.7 Travelstar 5K160 (PATA) Hard Disk Drive Specification Device Terminating Write DMA DMARQ DMACKSTOP DDMARDYHSTROBE DD(15:0) tRP tLI tMLI tACK tIORDYZ tRFS tLI tACK tDH tDS xxx WT ...
...10 - 7 - time at device tDH CRC word hold 5 - 5 - 5 - Ultra DMA cycle timings (Device Terminating Write) MODE3 MIN MAX (ns) (ns) - 60 100 - 0 100 20 - 7 - 5 - 20 - - 20 MODE4 MIN MAX (ns) (ns) - 60 100 - 0 100 20 - 5 - 5 - 20 - - 20 MODE5 MIN MAX (ns) (ns) - 50 85 - 0 75 20 - 4 - 4.6 ...for 20 - 20 - 20 - negation tIORDYZ Maximum time - 20 - 20 - 20 before releasing IORDY Figure 13. 7.9.7 Travelstar 5K160 (PATA) Hard Disk Drive Specification Device Terminating Write DMA DMARQ DMACKSTOP DDMARDYHSTROBE DD(15:0) tRP tLI tMLI tACK tIORDYZ tRFS tLI tACK tDH tDS xxx WT ...
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..., these bits are used , the "most recently written" content contains LBA Bits 8-15, and the "previous content" contains Bits 32-39. 60/188 Bit Definitions ICRCE (CRC) Interface CRC Error. CRC=1 indicates a CRC error has occurred on , a reset, or completion of the command... Set Features command, S.M.A.R.T. UNC=1 indicates an uncorrectable data error has been encountered. UNC Uncorrectable Data Error. HS3,HS2,HS1,HS0 Travelstar 5K160 (PATA) Hard Disk Drive Specification selected. IDNF (IDN) ID Not Found. This bit is obsolete. 11.8 Features Register This register is used , the ...
..., these bits are used , the "most recently written" content contains LBA Bits 8-15, and the "previous content" contains Bits 32-39. 60/188 Bit Definitions ICRCE (CRC) Interface CRC Error. CRC=1 indicates a CRC error has occurred on , a reset, or completion of the command... Set Features command, S.M.A.R.T. UNC=1 indicates an uncorrectable data error has been encountered. UNC Uncorrectable Data Error. HS3,HS2,HS1,HS0 Travelstar 5K160 (PATA) Hard Disk Drive Specification selected. IDNF (IDN) ID Not Found. This bit is obsolete. 11.8 Features Register This register is used , the ...
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...timer are unloaded on the users recent behavior. The IDENTIFY DEVICE response word 83, bit 3 indicates that Advanced Power Management is 60%-65% less than the value calculated from this mode to Active mode is about 20ms. 12.6.3 Low Power Idle mode Power... power but need more recovery time switching from the specified level by Set Feature Enable Advanced Power Management command. 12.6 Travelstar 5K160 (PATA) Hard Disk Drive Specification Advanced Power Management (Adaptive Battery Life Extender 3) Feature This feature provides power saving without servoing. This technology has ...
...timer are unloaded on the users recent behavior. The IDENTIFY DEVICE response word 83, bit 3 indicates that Advanced Power Management is 60%-65% less than the value calculated from this mode to Active mode is about 20ms. 12.6.3 Low Power Idle mode Power... power but need more recovery time switching from the specified level by Set Feature Enable Advanced Power Management command. 12.6 Travelstar 5K160 (PATA) Hard Disk Drive Specification Advanced Power Management (Adaptive Battery Life Extender 3) Feature This feature provides power saving without servoing. This technology has ...
Specifications
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...cylinders/heads/sectors by models for Number of cylinders/heads/sectors by models for number of sectors 60-61 Note.2 Total Number of User Addressable Sectors Word 60 specifies the low word of the number FFFFFFFh=The 48-bit native max address is Valid ...Current capacity in 'Content' field indicates the use of the capacity 59 0xxxH Current Multiple setting. Figure 53 Identify device information --- Travelstar 5K160 (PATA) Hard Disk Drive Specification 48 0000H * Capable of double word I/O, '0000'= cannot perform 49 0F00H Capabilities, bit assignments: 15-14 (=0) Reserved ...
...cylinders/heads/sectors by models for Number of cylinders/heads/sectors by models for number of sectors 60-61 Note.2 Total Number of User Addressable Sectors Word 60 specifies the low word of the number FFFFFFFh=The 48-bit native max address is Valid ...Current capacity in 'Content' field indicates the use of the capacity 59 0xxxH Current Multiple setting. Figure 53 Identify device information --- Travelstar 5K160 (PATA) Hard Disk Drive Specification 48 0000H * Capable of double word I/O, '0000'= cannot perform 49 0F00H Capabilities, bit assignments: 15-14 (=0) Reserved ...
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Travelstar 5K160 (PATA) Hard Disk Drive Specification Model Number in ASCII Number of cylinders Number of heads Buffer size Total number of user addressable sectors (word 60-61) Maximum user LBA address for 48-bit Address feature set (word 100-103) Hitachi HTS541616J9AT00 3FFFh 10h 3AB0h FFFFFFFh 12A19EB0h Hitachi HTS541612J9AT00 3FFFh 10h 3AB0h DF94BB0h DF94BB0h Model Number...
Travelstar 5K160 (PATA) Hard Disk Drive Specification Model Number in ASCII Number of cylinders Number of heads Buffer size Total number of user addressable sectors (word 60-61) Maximum user LBA address for 48-bit Address feature set (word 100-103) Hitachi HTS541616J9AT00 3FFFh 10h 3AB0h FFFFFFFh 12A19EB0h Hitachi HTS541612J9AT00 3FFFh 10h 3AB0h DF94BB0h DF94BB0h Model Number...
Specifications
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...the max address shall be changed to issuing Set Max ADDRESS command. After a successful command completion, Identify Device response words (61:60) shall reflect the maximum address set via this LBA as the max LBA of the device. Sector Count -------- Otherwise this command...the Set Max ADDRESS command is executed, this command is used for selection whether nonvolatile or volatile. When 146/188 Travelstar 5K160 (PATA) Hard Disk Drive Specification 14.35 Set Max ADDRESS (F9h) Command Block Output Registers Register 76543210 Data -------- B=0 is supported, the ...
...the max address shall be changed to issuing Set Max ADDRESS command. After a successful command completion, Identify Device response words (61:60) shall reflect the maximum address set via this LBA as the max LBA of the device. Sector Count -------- Otherwise this command...the Set Max ADDRESS command is executed, this command is used for selection whether nonvolatile or volatile. When 146/188 Travelstar 5K160 (PATA) Hard Disk Drive Specification 14.35 Set Max ADDRESS (F9h) Command Block Output Registers Register 76543210 Data -------- B=0 is supported, the ...
Specifications
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...the device in Address Offset mode. LBA Low Current Set Max LBA (7:0). LBA Low Previous Set Max LBA (31:24). Travelstar 5K160 (PATA) Hard Disk Drive Specification 14.36 Set Max ADDRESS EXT (37h) Command Block Output Registers Register 76543210 Data Low -------- Data High -------- V ... Error ...See Below... When the address requested is not supported, the maximum value to reflect the requested value, but words (61:60) shall not modified. B=0 is in Address Offset mode receives this command, all accesses beyond that Address are rejected with the nonvolatile ...
...the device in Address Offset mode. LBA Low Current Set Max LBA (7:0). LBA Low Previous Set Max LBA (31:24). Travelstar 5K160 (PATA) Hard Disk Drive Specification 14.36 Set Max ADDRESS EXT (37h) Command Block Output Registers Register 76543210 Data Low -------- Data High -------- V ... Error ...See Below... When the address requested is not supported, the maximum value to reflect the requested value, but words (61:60) shall not modified. B=0 is in Address Offset mode receives this command, all accesses beyond that Address are rejected with the nonvolatile ...