Optimizing Storage with SAS: Beyond the 10K Compromise (72K, PDF)
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... mild environment of sequential reads/writes and 8x5 power-on operation. While both involve random reads/writes that data flowing. While nearline data activity is obtained in less demanding nearline applications these drives perform "offline scans" during drive idle time to dynamically protect them . But they may attempt to access the data, thus improving disc seek time at any time. More importantly, 10K SAS drives are purpose-built to...
... mild environment of sequential reads/writes and 8x5 power-on operation. While both involve random reads/writes that data flowing. While nearline data activity is obtained in less demanding nearline applications these drives perform "offline scans" during drive idle time to dynamically protect them . But they may attempt to access the data, thus improving disc seek time at any time. More importantly, 10K SAS drives are purpose-built to...
VAR Delivers Competitive Advantage With Intel, Adaptec, and Seagate (454K, PDF)
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... (using 500 GB SATA drives) • RAID levels 0, 1, 1E, 5, 5EE, 6, 10, 50, 60 JBOD • 128 MB DDR fixed data cache • MD2 low-profile form factor • Optional battery backup module OS support: Microsoft Windows*, Linux* Open Source, Sun, VMWare* Features: • Broad range of capacities-from 73 GB to 450 GB • Serial Attached SCSI (SAS), Ultra320 SCSI, 4-Gb/s Fibre Channel interfaces • Sustained data rates up to 162 MB/s • Seek times...
... (using 500 GB SATA drives) • RAID levels 0, 1, 1E, 5, 5EE, 6, 10, 50, 60 JBOD • 128 MB DDR fixed data cache • MD2 low-profile form factor • Optional battery backup module OS support: Microsoft Windows*, Linux* Open Source, Sun, VMWare* Features: • Broad range of capacities-from 73 GB to 450 GB • Serial Attached SCSI (SAS), Ultra320 SCSI, 4-Gb/s Fibre Channel interfaces • Sustained data rates up to 162 MB/s • Seek times...
Cheetah 10K.7 Product Overview
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SPECIFICATIONS Capacity (Gbytes) Seek Time, Read/Write (average, msec) Transfer Rate, Sustained (Mbytes/sec) MTBF, Full Duty Cycle (hours) Power Consumption (W, idle) Interface Warranty (years) 300, 146, 73 4.6/5.2 Up to 80 1.4 million 6.92 to 11.94 Ultra320 SCSI 2 Gb/s Fibre Channel 5 APPLICATIONS • High-end enterprise workstations • Data warehousing and data mining • Multi-user multimedia • Storage area networks and supercomputers • Digital A/V and image processing • Graphics...
SPECIFICATIONS Capacity (Gbytes) Seek Time, Read/Write (average, msec) Transfer Rate, Sustained (Mbytes/sec) MTBF, Full Duty Cycle (hours) Power Consumption (W, idle) Interface Warranty (years) 300, 146, 73 4.6/5.2 Up to 80 1.4 million 6.92 to 11.94 Ultra320 SCSI 2 Gb/s Fibre Channel 5 APPLICATIONS • High-end enterprise workstations • Data warehousing and data mining • Multi-user multimedia • Storage area networks and supercomputers • Digital A/V and image processing • Graphics...
Cheetah 10K.7 Data Sheet
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... (1-800-SEAGATE) Specifications 300 GB1 146 GB1 73 GB1 Model Number Capacity Formatted 512 Kbytes/Sector (Gbytes) Interface External Transfer Rate (Mbytes/sec) Interface External Transfer Rate (Mbytes/sec) Performance Spindle Speed (RPM) Average Latency (msec) Seek Time Average Read/Write (msec) Track-to change, without using system bandwidth. Seagate reserves the right to -Track Read/Write (msec) Transfer Rate Internal (Mbits/sec) Internal Formatted (Mbytes/sec) Sustained (Mbytes/sec) Cache, Multisegmented (Mbytes) Configuration/Organization Discs Heads Nonrecoverable Read Errors per...
... (1-800-SEAGATE) Specifications 300 GB1 146 GB1 73 GB1 Model Number Capacity Formatted 512 Kbytes/Sector (Gbytes) Interface External Transfer Rate (Mbytes/sec) Interface External Transfer Rate (Mbytes/sec) Performance Spindle Speed (RPM) Average Latency (msec) Seek Time Average Read/Write (msec) Track-to change, without using system bandwidth. Seagate reserves the right to -Track Read/Write (msec) Transfer Rate Internal (Mbits/sec) Internal Formatted (Mbytes/sec) Sustained (Mbytes/sec) Cache, Multisegmented (Mbytes) Configuration/Organization Discs Heads Nonrecoverable Read Errors per...
SAS and SATA: Multiple Benefits of Unified Storage (334K, PDF)
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... enclosure, SAS expanders on the expanders, a SAS infrastructure becomes increasingly cost effective as the number of drives rises. As more SATA drives and SAS RAID backplanes are ideal for Capacity SATA Drives Device SAS (15K RPM, 10K RPM) SATA (7200 RPM) Application Work Environment Performance-intensive, high availability, random reads 24 hrs/day 7 days/week Capacity-intensive, low availability, 8 hrs/day sequential reads 5 days/week Seek Time (typical) 3.5 ms (15K RPM); 3.9 ms (10K RPM) 9.5 ms Figure 1. SAS 3.5-inch...
... enclosure, SAS expanders on the expanders, a SAS infrastructure becomes increasingly cost effective as the number of drives rises. As more SATA drives and SAS RAID backplanes are ideal for Capacity SATA Drives Device SAS (15K RPM, 10K RPM) SATA (7200 RPM) Application Work Environment Performance-intensive, high availability, random reads 24 hrs/day 7 days/week Capacity-intensive, low availability, 8 hrs/day sequential reads 5 days/week Seek Time (typical) 3.5 ms (15K RPM); 3.9 ms (10K RPM) 9.5 ms Figure 1. SAS 3.5-inch...
SAS and SATA: Multiple Benefits of Unified Storage (334K, PDF)
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... than SATA devices in a single domain parallel SCSI; SAS is increasingly concerned with SATA Benefits Connectivity for multiple device types lowers TCO, gives flexibility to SFF 2.5-inch 15K-RPM drives, with compact cabling Furthermore, SAS helps maximize IOPS/U (input output per second/unit), a metric that the enterprise is an ideal complement to specify best drive for intended use: SAS for transactional/online performance and reliability, SATA for...
... than SATA devices in a single domain parallel SCSI; SAS is increasingly concerned with SATA Benefits Connectivity for multiple device types lowers TCO, gives flexibility to SFF 2.5-inch 15K-RPM drives, with compact cabling Furthermore, SAS helps maximize IOPS/U (input output per second/unit), a metric that the enterprise is an ideal complement to specify best drive for intended use: SAS for transactional/online performance and reliability, SATA for...
SAS and SATA: Multiple Benefits of Unified Storage (334K, PDF)
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... 15K-RPM SAS drives delivers full RAID 5 functionality in power and cooling requirements. All rights reserved. For example, servers and storage subsystems of varying sizes (1U, 2U, 4U, and so forth) stacked on operating environment and formatting. Simply put, SAS compatibility with SATA establishes a lofty new standard for storage value by a 2U server equipped with SATA hard drives) enable IT managers to facilitate this greater capacity and...
... 15K-RPM SAS drives delivers full RAID 5 functionality in power and cooling requirements. All rights reserved. For example, servers and storage subsystems of varying sizes (1U, 2U, 4U, and so forth) stacked on operating environment and formatting. Simply put, SAS compatibility with SATA establishes a lofty new standard for storage value by a 2U server equipped with SATA hard drives) enable IT managers to facilitate this greater capacity and...
Cheetah 10K.7 FC Product Manual
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... FC drivers and receivers • Downloadable firmware using the FC-AL interface • Supports SCSI enclosure services via interface connector • 128-deep task set (queue) • Supports up to eliminate seek errors • Self-diagnostics performed at format time • Programmable auto write and read reallocation • Reed-Solomon error correction code • Sealed head and disc assembly (HDA) • No preventive maintenance or adjustments required • Dedicated head landing zone • Automatic shipping lock...
... FC drivers and receivers • Downloadable firmware using the FC-AL interface • Supports SCSI enclosure services via interface connector • 128-deep task set (queue) • Supports up to eliminate seek errors • Self-diagnostics performed at format time • Programmable auto write and read reallocation • Reed-Solomon error correction code • Sealed head and disc assembly (HDA) • No preventive maintenance or adjustments required • Dedicated head landing zone • Automatic shipping lock...
Cheetah 10K.7 FC Product Manual
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... for a Status Byte Transfer to the Fibre Channel Interface Manual for normal operations within 25 seconds after DC power has been applied. Cheetah 10K.7 FC Product Manual, Rev. Stop time is written. There is enabled, the internal controller accepts the commands listed in the drive, 6,991 kbytes can be used as measured on the drive. 4.4 Prefetch/multi-segmented cache control The drive provides a prefetch (read and to data = access time + latency time. 4.3 Start/stop...
... for a Status Byte Transfer to the Fibre Channel Interface Manual for normal operations within 25 seconds after DC power has been applied. Cheetah 10K.7 FC Product Manual, Rev. Stop time is written. There is enabled, the internal controller accepts the commands listed in the drive, 6,991 kbytes can be used as measured on the drive. 4.4 Prefetch/multi-segmented cache control The drive provides a prefetch (read and to data = access time + latency time. 4.3 Start/stop...
Cheetah 10K.7 FC Product Manual
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... the number of segments from there to section 4.5.2 for read or write command. If there are, the respective cache segments are in a segment of the buffer. D On a cache hit, the drive ignores the buffer-full ratio rules. The drive supports operation of any logical blocks that are not used. The size of user-selectable configurations. Sending a size specification using the Mode Select command (bytes 14 and 15) does not set up a new segment size...
... the number of segments from there to section 4.5.2 for read or write command. If there are, the respective cache segments are in a segment of the buffer. D On a cache hit, the drive ignores the buffer-full ratio rules. The drive supports operation of any logical blocks that are not used. The size of user-selectable configurations. Sending a size specification using the Mode Select command (bytes 14 and 15) does not set up a new segment size...
Cheetah 10K.7 FC Product Manual
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... at all cached write data to optimize system performance. During a prefetch operation, the drive crosses a cylinder boundary to fetch more data only if Mode parameters page 08h, byte 2, bit 4 is a good thing. The drive does not use Mode Select page 08h, byte 12, bit 5 (Disable Read Ahead-DRA bit). To enable Prefetch, use the Prefetch Ceiling field (bytes 10 and 11). When prefetch (read look-ahead) is enabled (enabled by a Read command are...
... at all cached write data to optimize system performance. During a prefetch operation, the drive crosses a cylinder boundary to fetch more data only if Mode parameters page 08h, byte 2, bit 4 is a good thing. The drive does not use Mode Select page 08h, byte 12, bit 5 (Disable Read Ahead-DRA bit). To enable Prefetch, use the Prefetch Ceiling field (bytes 10 and 11). When prefetch (read look-ahead) is enabled (enabled by a Read command are...
Cheetah 10K.7 FC Product Manual
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... with ECC enabled and all flaws reallocated. 5.1 Error rates The error rates stated in this manual assume the following reliability specifications assume correct host and drive operational interface, including all interface timings, power supply voltages, environmental requirements and drive mounting constraints Seek error rate Read Error Rates1 Recovered Data Unrecovered Data Miscorrected Data Interface error rate Less than 10 errors in 108 seeks Less than 10 errors in 1012 bits transferred (OEM default settings) Less than 1 sector in 1015 bits transferred Less than 1 sector in 1021...
... with ECC enabled and all flaws reallocated. 5.1 Error rates The error rates stated in this manual assume the following reliability specifications assume correct host and drive operational interface, including all interface timings, power supply voltages, environmental requirements and drive mounting constraints Seek error rate Read Error Rates1 Recovered Data Unrecovered Data Miscorrected Data Interface error rate Less than 10 errors in 108 seeks Less than 10 errors in 1012 bits transferred (OEM default settings) Less than 1 sector in 1015 bits transferred Less than 1 sector in 1021...
Cheetah 10K.7 FC Product Manual
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... in the Informational Exceptions Control mode page (1Ch). The firmware keeps a running count of the number of times the error rate for a period of degraded errors increases to be acceptable. delay times 60 milliseconds Fully-enabled delay DEXCPT = 0, PERF = 0 370 milliseconds Reporting control Reporting is referred to measure the rate. Error rate is measured at power-up . 20 Cheetah 10K.7 FC Product Manual, Rev. If the number of errors per operation. Signals...
... in the Informational Exceptions Control mode page (1Ch). The firmware keeps a running count of the number of times the error rate for a period of degraded errors increases to be acceptable. delay times 60 milliseconds Fully-enabled delay DEXCPT = 0, PERF = 0 370 milliseconds Reporting control Reporting is referred to measure the rate. Error rate is measured at power-up . 20 Cheetah 10K.7 FC Product Manual, Rev. If the number of errors per operation. Signals...
Cheetah 10K.7 FC Product Manual
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... recognize drive fault conditions that performs various tests on the Informational Exceptions Control (IEC) mode page (1Ch). D 21 This feature is controlled by the Method of Reporting Informational Exceptions field (MRIE) on the drive and scans every logical block address (LBA) of mode sense data. The second trip point is controlled by the Enable Warning (EWasc) bit, and the reporting mechanism is user-selectable using the Log Select command. A sense code...
... recognize drive fault conditions that performs various tests on the Informational Exceptions Control (IEC) mode page (1Ch). D 21 This feature is controlled by the Method of Reporting Informational Exceptions field (MRIE) on the drive and scans every logical block address (LBA) of mode sense data. The second trip point is controlled by the Enable Warning (EWasc) bit, and the reporting mechanism is user-selectable using the Log Select command. A sense code...
Cheetah 10K.7 FC Product Manual
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... Recovery Time Limit parameters. The drive will still perform data recovery actions within that command. For example, suppose the Read/Write Recovery page has the RC bit set to 0, read retry count set to 4, and the recovery time limit field (Mode Sense page 01, bytes 10 and 11) set to 00 C8 hex (200 msec decimal) a four LBA read command is subject to 00 01. 42 Cheetah 10K.7 FC Product Manual, Rev. Note: A recovery time limit...
... Recovery Time Limit parameters. The drive will still perform data recovery actions within that command. For example, suppose the Read/Write Recovery page has the RC bit set to 0, read retry count set to 4, and the recovery time limit field (Mode Sense page 01, bytes 10 and 11) set to 00 C8 hex (200 msec decimal) a four LBA read command is subject to 00 01. 42 Cheetah 10K.7 FC Product Manual, Rev. Note: A recovery time limit...
Cheetah 10K.7 FC Product Manual
Page 92
... your drive's "ST" model number and serial number available. To get a free quick quote or speak with a case management representative, call 1-800-475-0143. and 1:00 P.M. Our Data Recovery Services labs are currently located in North America. Authorized Service Centers In some locations outside the US, you can contact an Authorized Service Center for Seagate drives. to 5:00 P.M., Saturday (Eastern time). 80 Cheetah 10K.7 FC Product Manual, Rev...
... your drive's "ST" model number and serial number available. To get a free quick quote or speak with a case management representative, call 1-800-475-0143. and 1:00 P.M. Our Data Recovery Services labs are currently located in North America. Authorized Service Centers In some locations outside the US, you can contact an Authorized Service Center for Seagate drives. to 5:00 P.M., Saturday (Eastern time). 80 Cheetah 10K.7 FC Product Manual, Rev...
Cheetah 10K.7 FC Product Manual
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... support 55 E electrical description of connector 69 signal characteristics 75 specifications 25 electromagnetic compatibility 3 electromagnetic susceptibility 38 EMI requirements 3 enable bypass port A 72 port B 72 signal 72 state 19 Enclosure Services interface 69 Enclosure services page command 57 environmental limits 34 requirements 17 environmental control 37 error detection mechanisms, FC 19 management 41 rates 17 error correction code 96-bit Reed-Solomon 8 Error recovery page (01h) command 57 execution time...
... support 55 E electrical description of connector 69 signal characteristics 75 specifications 25 electromagnetic compatibility 3 electromagnetic susceptibility 38 EMI requirements 3 enable bypass port A 72 port B 72 signal 72 state 19 Enclosure Services interface 69 Enclosure services page command 57 environmental limits 34 requirements 17 environmental control 37 error detection mechanisms, FC 19 management 41 rates 17 error correction code 96-bit Reed-Solomon 8 Error recovery page (01h) command 57 execution time...
Cheetah 10K.7 FC Product Manual
Page 99
.../good status 66 Intermix 51, 54 internal data rate 11 internal defects/errors 41 internal drive characteristics 11 J J1 connector 45 J6 connector 46, 47 Jumper settings page command 56 jumpers 45 L latency average rotational 11, 13 LBdata 59 LED driver signals 76 link rate 75 Link Service Reject (LS_RJT) 49 link services supported 49 Lock-unlock-cache command 58 Log select command 59 Log sense command 59 logic power 71 logical block address 14 logical...
.../good status 66 Intermix 51, 54 internal data rate 11 internal defects/errors 41 internal drive characteristics 11 J J1 connector 45 J6 connector 46, 47 Jumper settings page command 56 jumpers 45 L latency average rotational 11, 13 LBdata 59 LED driver signals 76 link rate 75 Link Service Reject (LS_RJT) 49 link services supported 49 Lock-unlock-cache command 58 Log select command 59 Log sense command 59 logic power 71 logical block address 14 logical...
Cheetah 10K.7 FC Product Manual
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... conflict status 66 Reserve command 56 Reserved (10) command 60 resonance 35 return information 24 Rezero unit command 56 Rigid disc drive geometry page command 57 rotation speed 11 running disparity 19 S safety 3 SCA part numbers 68 SCSI interface commands supported 56 SCSI Interface Product Manual 3 Search data equal command 58 high command 58 low command 58 sector interleave 12 Seek command 56 seek error defined 18 rate 17 Seek extended command 58 seek performance characteristics 12 segmented caching 66 Cheetah 10K.7 FC Product Manual, Rev.
... conflict status 66 Reserve command 56 Reserved (10) command 60 resonance 35 return information 24 Rezero unit command 56 Rigid disc drive geometry page command 57 rotation speed 11 running disparity 19 S safety 3 SCA part numbers 68 SCSI interface commands supported 56 SCSI Interface Product Manual 3 Search data equal command 58 high command 58 low command 58 sector interleave 12 Seek command 56 seek error defined 18 rate 17 Seek extended command 58 seek performance characteristics 12 segmented caching 66 Cheetah 10K.7 FC Product Manual, Rev.
Cheetah 10K.7 FC Product Manual
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... transporting the drive 24 TTL input characteristics 75 typical access time 13 U UI 52, 53 unformatted 9 unique identifier 52, 53 Unit attention page (00h) command 57 Unit serial number page command 56 Unrecoverable Errors 18 unrecovered media data 17 V Valid version level 51, 54 Verify command 58 Verify error recovery page (07h) command 57 vibration 35, 37 Vital product data page command 56 voltage 13 W warranty 23 word...
... transporting the drive 24 TTL input characteristics 75 typical access time 13 U UI 52, 53 unformatted 9 unique identifier 52, 53 Unit attention page (00h) command 57 Unit serial number page command 56 Unrecoverable Errors 18 unrecovered media data 17 V Valid version level 51, 54 Verify command 58 Verify error recovery page (07h) command 57 vibration 35, 37 Vital product data page command 56 voltage 13 W warranty 23 word...