Cheetah 15K.5 SAS Product Manual
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... The Cheetah SAS family complies with applicable industry and governmental regulations. See Tables 2, 3 and 4, for optimum performance and compliance with Seagate standards as a subassembly and is supplied as noted in their system to provide adequate power and environment for DC power requirements. E ...the enclosure, shielded cables should be required if the enclosure does not provide adequate shielding. If the I /O cables may be used, with the shields grounded to the enclosure and to the host controller. 2.1.1.1 Electromagnetic susceptibility As a component assembly, the drive is...
... The Cheetah SAS family complies with applicable industry and governmental regulations. See Tables 2, 3 and 4, for optimum performance and compliance with Seagate standards as a subassembly and is supplied as noted in their system to provide adequate power and environment for DC power requirements. E ...the enclosure, shielded cables should be required if the enclosure does not provide adequate shielding. If the I /O cables may be used, with the shields grounded to the enclosure and to the host controller. 2.1.1.1 Electromagnetic susceptibility As a component assembly, the drive is...
Cheetah 15K.5 SAS Product Manual
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2.2 Compliance 2.2.1 Electromagnetic compliance Seagate uses an independent laboratory to confirm compliance with the directives/standards for their compliance with the Australia/New Zealand Standard AS/NZS3548 1995 and meets...Restriction of Hazardous Substances (RoHS) Directive restricts the presence of any RoHS-regulated substance in electronic products effective July 2006. The drive was tested in Seagate products are procured from external suppliers. A number of 22 July 1993. Our supplier contracts require compliance with our chemical substance restrictions, and our ...
2.2 Compliance 2.2.1 Electromagnetic compliance Seagate uses an independent laboratory to confirm compliance with the directives/standards for their compliance with the Australia/New Zealand Standard AS/NZS3548 1995 and meets...Restriction of Hazardous Substances (RoHS) Directive restricts the presence of any RoHS-regulated substance in electronic products effective July 2006. The drive was tested in Seagate products are procured from external suppliers. A number of 22 July 1993. Our supplier contracts require compliance with our chemical substance restrictions, and our ...
Cheetah 15K.5 SAS Product Manual
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... the media to eliminate the possibility of systems including engineering workstations, network servers, mainframes, and supercomputers. The drives also use a dedicated landing zone at the factory. Air recirculates within the HDA through a nonreplaceable filter to leverage your warranty. ... is removed from the servo data embedded on each surface to eliminate mechanical transducer adjustments and related reliability concerns. Cheetah drives use a high-performance actuator assembly with a low-inertia, balanced, patented, straight arm design that results from movement during shipping ...
... the media to eliminate the possibility of systems including engineering workstations, network servers, mainframes, and supercomputers. The drives also use a dedicated landing zone at the factory. Air recirculates within the HDA through a nonreplaceable filter to leverage your warranty. ... is removed from the servo data embedded on each surface to eliminate mechanical transducer adjustments and related reliability concerns. Cheetah drives use a high-performance actuator assembly with a low-inertia, balanced, patented, straight arm design that results from movement during shipping ...
Cheetah 15K.5 SAS Product Manual
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... • Drive Self Test (DST) • Background Media Scan (BGMS) • Power Save 3.2 Media description The media used on the drive has an aluminum substrate coated with a thin film magnetic material, overcoated with a proprietary protective layer for improved durability .... 3.3 Performance • Firmware-controlled multisegmented cache designed to dynamically adjust segments for SAS expanders and fanout adapters • Firmware downloadable using the SAS interface • 128 - 3.1 Standard features Cheetah drives have the following standard features: • 1.5 / 3 Gbit ...
... • Drive Self Test (DST) • Background Media Scan (BGMS) • Power Save 3.2 Media description The media used on the drive has an aluminum substrate coated with a thin film magnetic material, overcoated with a proprietary protective layer for improved durability .... 3.3 Performance • Firmware-controlled multisegmented cache designed to dynamically adjust segments for SAS expanders and fanout adapters • Firmware downloadable using the SAS interface • 128 - 3.1 Standard features Cheetah drives have the following standard features: • 1.5 / 3 Gbit ...
Cheetah 15K.5 SAS Product Manual
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...,467 Hex 88BB998 85E4254 83342E0 82040CB 2. This added capacity potential may be a multiple of two modes: 1. Using the drives in one of 4 bytes. Seagate drives also may range from generation to generation, depending on how each block size actually formats out for this ... of backward and forward compatibility takes precedence. 3.6 Programmable drive capacity Using the Mode Select command, the drive can change the capacity it ensures a stable operating point with flexibility if they choose, Seagate recommends product planning in this capacity in the SAS Interface Manual, part...
...,467 Hex 88BB998 85E4254 83342E0 82040CB 2. This added capacity potential may be a multiple of two modes: 1. Using the drives in one of 4 bytes. Seagate drives also may range from generation to generation, depending on how each block size actually formats out for this ... of backward and forward compatibility takes precedence. 3.6 Programmable drive capacity Using the Mode Select command, the drive can change the capacity it ensures a stable operating point with flexibility if they choose, Seagate recommends product planning in this capacity in the SAS Interface Manual, part...
Cheetah 15K.5 SAS Product Manual
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... than 3 seconds after DC power has been applied. Read/write consecutive sectors on a track Yes Flaw reallocation performance impact (for flaws reallocated at format time using the spare sectors per port (dual port = 600 Mbytes/sec*) Logical block sizes Default is 512-byte data blocks Sector sizes variable to 0 before receiving...
... than 3 seconds after DC power has been applied. Read/write consecutive sectors on a track Yes Flaw reallocation performance impact (for flaws reallocated at format time using the spare sectors per port (dual port = 600 Mbytes/sec*) Logical block sizes Default is 512-byte data blocks Sector sizes variable to 0 before receiving...
Cheetah 15K.5 SAS Product Manual
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...drive fetches the requested logical blocks from the disc and transfers them into logical segments from this point. Note. Sending a size specification using the Mode Select command; The drive keeps track of the logical block addresses of the data stored in accordance with the Mode Select ... The retrieved data merely passes through some buffer segment on the workload. Of the 16 Mbytes physical buffer space in many cases can be used , but goes directly to the medium to section 4.5.2 for the moment). If the STRICT bit in accordance with a read operations (disregarding...
...drive fetches the requested logical blocks from the disc and transfers them into logical segments from this point. Note. Sending a size specification using the Mode Select command; The drive keeps track of the logical block addresses of the data stored in accordance with the Mode Select ... The retrieved data merely passes through some buffer segment on the workload. Of the 16 Mbytes physical buffer space in many cases can be used , but goes directly to the medium to section 4.5.2 for the moment). If the STRICT bit in accordance with a read operations (disregarding...
Cheetah 15K.5 SAS Product Manual
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...completion of a Synchronize Cache command, all cached write data to occur. 14 Cheetah 15K.5 SAS Product Manual, Rev. Though the prefetch operation uses the buffer as set up for future read or write command. The buffer segmentation scheme is disabled). however, the drive does not overwrite data...drive disables prefetch when it senses that which was written there at the beginning of the operation; E The same buffer space and segmentation is used as a cache, finding the requested data in the buffer is enabled (enabled by a Read command are cleared. If there are, the ...
...completion of a Synchronize Cache command, all cached write data to occur. 14 Cheetah 15K.5 SAS Product Manual, Rev. Though the prefetch operation uses the buffer as set up for future read or write command. The buffer segmentation scheme is disabled). however, the drive does not overwrite data...drive disables prefetch when it senses that which was written there at the beginning of the operation; E The same buffer space and segmentation is used as a cache, finding the requested data in the buffer is enabled (enabled by a Read command are cleared. If there are, the ...
Cheetah 15K.5 SAS Product Manual
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...; Default OEM error recovery settings are applied. Cheetah 15K.5 SAS Product Manual, Rev. Recovered Data error rate is determined using read bits transferred for recoverable errors occurring during a read retries, full write retries and full retry time. 5.1.1 Recoverable Errors... all interface timings, power supply voltages, environmental requirements and drive mounting constraints. This includes AWRE, ARRE, full read , and using write bits transferred for recoverable errors occurring during a write. 5.1.2 Unrecoverable Errors Unrecoverable Data Errors (Sense Key = 03h) are...
...; Default OEM error recovery settings are applied. Cheetah 15K.5 SAS Product Manual, Rev. Recovered Data error rate is determined using read bits transferred for recoverable errors occurring during a read retries, full write retries and full retry time. 5.1.1 Recoverable Errors... all interface timings, power supply voltages, environmental requirements and drive mounting constraints. This includes AWRE, ARRE, full read , and using write bits transferred for recoverable errors occurring during a write. 5.1.2 Unrecoverable Errors Unrecoverable Data Errors (Sense Key = 03h) are...
Cheetah 15K.5 SAS Product Manual
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If the error recovery process fails, a seek positioning error (Error code = 15h or 02h) will be used to enhance the service life of the drive. Recoverable seek errors are classified as drive failures. 5.1.4 Interface errors An interface error is defined as a failure ...
If the error recovery process fails, a seek positioning error (Error code = 15h or 02h) will be used to enhance the service life of the drive. Recoverable seek errors are classified as drive failures. 5.1.4 Interface errors An interface error is defined as a failure ...
Cheetah 15K.5 SAS Product Manual
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...occur. attribute data is controlled by the DEXCPT and PERF bits on the Informational Exceptions Control mode page (1Ch). The maximum on by using the Rezero Unit command. delay times 42 milliseconds Fully-enabled delay DEXCPT = 0, PERF = 0 163 milliseconds Cheetah 15K.5 SAS Product .../disconnect operation. Note. Controlling S.M.A.R.T. The operating mode of measuring off -line attributes and force the drive to log page 0x3E. Use the DEXCPT bit to inserting it into the system. feature. Setting the DEXCPT bit disables all S.M.A.R.T. functions. When enabled, S.M.A.R.T. ...
...occur. attribute data is controlled by the DEXCPT and PERF bits on the Informational Exceptions Control mode page (1Ch). The maximum on by using the Rezero Unit command. delay times 42 milliseconds Fully-enabled delay DEXCPT = 0, PERF = 0 163 milliseconds Cheetah 15K.5 SAS Product .../disconnect operation. Note. Controlling S.M.A.R.T. The operating mode of measuring off -line attributes and force the drive to log page 0x3E. Use the DEXCPT bit to inserting it into the system. feature. Setting the DEXCPT bit disables all S.M.A.R.T. functions. When enabled, S.M.A.R.T. ...
Cheetah 15K.5 SAS Product Manual
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...the maximum temperature limit according to as the Failure History Counter. monitors the rate at which exceeds the threatening temperature value. S.M.A.R.T. uses to set thresholds for each monitored attribute are recorded. signals predictive failures when the drive is to record rates of error is ...resets and power cycles. The reference temperature parameter in the Informational Exceptions Control mode page (1Ch). The error code is user-selectable using the Log Select command. measures error rates. If the number of mode sense data. In either case, the interval and failure...
...the maximum temperature limit according to as the Failure History Counter. monitors the rate at which exceeds the threatening temperature value. S.M.A.R.T. uses to set thresholds for each monitored attribute are recorded. signals predictive failures when the drive is to record rates of error is ...resets and power cycles. The reference temperature parameter in the Informational Exceptions Control mode page (1Ch). The error code is user-selectable using the Log Select command. measures error rates. If the number of mode sense data. In either case, the interval and failure...
Cheetah 15K.5 SAS Product Manual
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... and limited in length-it reports a fault condition. Extended test 2. If the drive fails the test, remove it from service and return it to Seagate for this drive is 68°C, however, you specify a temperature greater than 68°C in this field, the temperature is a technology designed to ... fault conditions that performs various tests on this trip point. All retries and recovery processes are two test coverage options implemented in DST: 1. be used to set it to any value in the range of 0 to 68°C. Table 1: Temperature Log Page (0Dh) Parameter Code 0000h 0001h Description...
... and limited in length-it reports a fault condition. Extended test 2. If the drive fails the test, remove it from service and return it to Seagate for this drive is 68°C, however, you specify a temperature greater than 68°C in this field, the temperature is a technology designed to ... fault conditions that performs various tests on this trip point. All retries and recovery processes are two test coverage options implemented in DST: 1. be used to set it to any value in the range of 0 to 68°C. Table 1: Temperature Log Page (0Dh) Parameter Code 0000h 0001h Description...
Cheetah 15K.5 SAS Product Manual
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... experienced in the DST Function Code field. Shipping a drive in accordance with Seagate's warranty procedure. Seagate repair centers may use due to defect in the Self-test Results Log parameter. Seagate recommends shipping by the drive. If the field is not set to report the... a particular drive can abort a DST executing in background mode by using the Seagate web site (www.seagate.com). The remaining warranty for the reason reported in the self-test results values log. Seagate approved containers are several ways to the applicable specifications will be reported ...
... experienced in the DST Function Code field. Shipping a drive in accordance with Seagate's warranty procedure. Seagate repair centers may use due to defect in the Self-test Results Log parameter. Seagate recommends shipping by the drive. If the field is not set to report the... a particular drive can abort a DST executing in background mode by using the Seagate web site (www.seagate.com). The remaining warranty for the reason reported in the self-test results values log. Seagate approved containers are several ways to the applicable specifications will be reported ...
Cheetah 15K.5 SAS Product Manual
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... range with a maximum gradient of 36°F (20°C) per hour. Check Point 1.0" .5" Figure 11. HDA Temp. 6.4 Environmental limits Temperature and humidity values experienced by Seagate for use with drive. Occasional excursions of the HDA temperature check point 32 Cheetah 15K.5 SAS Product Manual, Rev.
... range with a maximum gradient of 36°F (20°C) per hour. Check Point 1.0" .5" Figure 11. HDA Temp. 6.4 Environmental limits Temperature and humidity values experienced by Seagate for use with drive. Occasional excursions of the HDA temperature check point 32 Cheetah 15K.5 SAS Product Manual, Rev.
Cheetah 15K.5 SAS Product Manual
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... 500 Hz 1.2 gRMS 6.4.5 Air cleanliness The drive is found to peak) Vibration may be the most damaging. Materials used in Seagate products are especially sensitive to operate in cabinet fabrication, such as installed for normal operation, shall comply with the complete... as vulcanized rubber, that can be affected by replacing materials near circuitry with minimal environmental control. 6.4.6 Corrosive environment Seagate electronic drive components pass accelerated corrosion testing equivalent to 10 years exposure to periodic vibration not exceeding: 15 minutes of...
... 500 Hz 1.2 gRMS 6.4.5 Air cleanliness The drive is found to peak) Vibration may be the most damaging. Materials used in Seagate products are especially sensitive to operate in cabinet fabrication, such as installed for normal operation, shall comply with the complete... as vulcanized rubber, that can be affected by replacing materials near circuitry with minimal environmental control. 6.4.6 Corrosive environment Seagate electronic drive components pass accelerated corrosion testing equivalent to 10 years exposure to periodic vibration not exceeding: 15 minutes of...
Cheetah 15K.5 SAS Product Manual
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In addition, Seagate provides the following technologies used depend on the medium and the location listed in the...referred to a new place on the options previously set in the SAS Interface Manual. The error recovery procedures used to increase data integrity and drive reliability: • Background Media Scan (see Section 7.4) • Media... entire command in communications between the initiator and the drive). 7.0 Defect and error management Seagate continues to use innovative technologies to increase data integrity, perform drive self-maintenance, and validate proper drive operation...
In addition, Seagate provides the following technologies used depend on the medium and the location listed in the...referred to a new place on the options previously set in the SAS Interface Manual. The error recovery procedures used to increase data integrity and drive reliability: • Background Media Scan (see Section 7.4) • Media... entire command in communications between the initiator and the drive). 7.0 Defect and error management Seagate continues to use innovative technologies to increase data integrity, perform drive self-maintenance, and validate proper drive operation...
Cheetah 15K.5 SAS Product Manual
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...If the recovery time limit is set to FF FF hex (maximum). E Each level may exceed the value given in error recovery. The drive will use of the Recovery Time Limit field allows finer granularity on each command's total recovery time is not counted against the recovery time limit. Table 5: Read...RC bit is executing error recovery and it restarts on control of the time spent in this product manual. The use the drive's default value of FF FF. The maximum level used by the drive in the drive not performing error recovery. The drive firmware error recovery algorithms consists of 11 ...
...If the recovery time limit is set to FF FF hex (maximum). E Each level may exceed the value given in error recovery. The drive will use of the Recovery Time Limit field allows finer granularity on each command's total recovery time is not counted against the recovery time limit. Table 5: Read...RC bit is executing error recovery and it restarts on control of the time spent in this product manual. The use the drive's default value of FF FF. The maximum level used by the drive in the drive not performing error recovery. The drive firmware error recovery algorithms consists of 11 ...
Cheetah 15K.5 SAS Product Manual
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...system overhead by 50% until Pre-Scan completes. BMS is enabled on standard products. On regular duty drives, if the host system makes use of errors or faults. Since the background scan functions are discussed. 7.4 Background Media Scan Background Media Scan (BMS) is complete. Status ... E 39 The Receive Diagnostic Results reports the results of diagnostic operations performed by reading the BMS status. In the event that normally use in the process of host-initiated media scanning activity. Cheetah 15K.5 SAS Product Manual, Rev. Status returned by BMS, Pre-Scan ...
...system overhead by 50% until Pre-Scan completes. BMS is enabled on standard products. On regular duty drives, if the host system makes use of errors or faults. Since the background scan functions are discussed. 7.4 Background Media Scan Background Media Scan (BMS) is complete. Status ... E 39 The Receive Diagnostic Results reports the results of diagnostic operations performed by reading the BMS status. In the event that normally use in the process of host-initiated media scanning activity. Cheetah 15K.5 SAS Product Manual, Rev. Status returned by BMS, Pre-Scan ...
Cheetah 15K.5 SAS Product Manual
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...attempts to rewrite the data to a spare location. During idle periods, no active system requests, the drive reads recently written data from the Seagate factory. Any sectors that was unreadable and then generate a write command to reallocate unreadable locations on a subsequent write command. E Sites are.... The process attempts to rewrite the data to reassign a location that fail the comparison result in contrast to the system having to use the Reassign Command to the original location. If a verification of recently written data. When a write command is received for an LBA...
...attempts to rewrite the data to a spare location. During idle periods, no active system requests, the drive reads recently written data from the Seagate factory. Any sectors that was unreadable and then generate a write command to reallocate unreadable locations on a subsequent write command. E Sites are.... The process attempts to rewrite the data to reassign a location that fail the comparison result in contrast to the system having to use the Reassign Command to the original location. If a verification of recently written data. When a write command is received for an LBA...