Seagate 100620418 manuale d’uso

Product Manual Constellation.2 TM SAS 100620418 Rev. H April 2012 Standard Models ST91000640SS ST9500620SS Self-Encrypting Drive Models ST91000641SS ST9500621SS SED FIPS 140-2 Models ST91000642SS ST9500622SS[...]

Revision history © 2012, Seagate Technology LLC All rights reserved. Publication number: 100620418, Rev. H April 2012 Seagate, Seagate Technology and the Wave logo are registered trademarks of Seagate Technology LLC in the United States and/or other countries. Constellation and SeaTools are either trademarks or registered trademarks of Seagate Tec[...]

Constellation.2 SAS Product Manual, Rev. H i Contents 1.0 Seagate Technology support services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2.0 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 3.0 Appl[...]

ii Constellation.2 SAS Product Manual, Rev. H 7.4 Power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 7.5 Environmental limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 7.5.1 Temperature . . . . . . .[...]

Constellation.2 SAS Product Manual, Rev. H iii 12.4.2 Physical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 12.4.3 Connector requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 12.4.4 Electrical description . . . . . . . . . . . . . . . . . [...]

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Constellation.2 SAS Product Manual, Rev. H v List of Figures Figure 1. 1TB model current profiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Figure 2. 500GB model current profiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [...]

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Constellation.2 SAS Product Manual, Rev. H 1 1.0 Seagate Technology support services SEAGATE ONLINE SUPPORT and SERVICES For information regarding products and services, visit http://www.seagate.com/www/en-us/about/contact_us/ Available services include: Presales & Technical support Global Support Services telephone numbers & business hours[...]

2 Constellation.2 SAS Product Manual, Rev. H 2.0 Scope This manual describes Seagate Technology ® LLC, Constellation.2 TM SAS (Serial Attached SCSI) disk drives. Constellation.2 SAS drives support the SAS Protocol specifications to the extent described in this manual. The SAS Interface Manual (part number 100293071) describes the general SAS chara[...]

Constellation.2 SAS Product Manual, Rev. H 3 3.0 Applicable standards and reference documentation The drives documented in this manual have been developed as system peripherals to the highest standards of design and construction. The drives depends on host equipment to provide adequate power and environment for optimum performance and compliance wi[...]

4 Constellation.2 SAS Product Manual, Rev. H 3.1.2 Electromagnetic compliance Seagate uses an independent laboratory to confirm compliance with the directives/standards for CE Marking and C-Tick Marking. The drive was tested in a representative system for typical applications and comply with the Electromagnetic Interference/Electromagnetic Suscepti[...]

Constellation.2 SAS Product Manual, Rev. H 5 3.1.3 European Union Restriction of Hazardous Substances (RoHS) The European Union Restriction of Hazardous Substances (RoHS) Directive, restricts the presence of chemi- cal substances, including Lead, Cadmium, Mercury, Hexavalent Chromium, PBB and PBDE, in electronic prod- ucts, effective July 2006. Thi[...]

6 Constellation.2 SAS Product Manual, Rev. H 3.2 Reference documents SAS Interface Manual Seagate part number: 100293071 SCSI Commands Reference Manual Seagate part number: 100293068 Self-Encrypting Drives Reference Manual Seagate part number: 100515636 ANSI SAS Documents SFF-8223 2.5” Drive Form Factor with Serial Connector SFF-8460 HSS Backplan[...]

Constellation.2 SAS Product Manual, Rev. H 7 4.0 General description Constellation.2 drives provide high performance, high capacity data storage for a variety of systems including engineering workstations, network servers, mainframes, and supercomputers. The Serial Attached SCSI inter- face is designed to meet next-generation computing demands for [...]

8 Constellation.2 SAS Product Manual, Rev. H 4.1 Standard features Constellation.2 drives have the following standard features: • Perpendicular recording technology • 1.5 / 3 / 6 Gb Serial Attached SCSI (SAS) interface • Integrated dual port SAS controller supporting the SCSI protocol • Support for SAS expanders and fanout adapters • Firm[...]

Constellation.2 SAS Product Manual, Rev. H 9 4.3 Performance • Programmable multi-segmentable cache buffer • 600 MB/s maximum instantaneous data transfers. • 7200 RPM spindle. Average latency = 4.16ms • Background processing of queue • Supports start and stop commands (spindle stops spinning) • Adaptive seek velocity; improved seek perf[...]

10 Constellation.2 SAS Product Manual, Rev. H 4.7 Factory-installed options You may order the following items which are incorporated at the manufacturing facility during production or packaged before shipping. Some of the options available are (not an exhaustive list of possible options): • Other capacities can be ordered depending on sparing sch[...]

Constellation.2 SAS Product Manual, Rev. H 11 5.0 Performance characteristics This section provides detailed information concerning performance-related characteristics and features of Con- stellation.2 drives. 5.1 Internal drive characteristics ST91000640SS ST9500620SS ST91000641SS ST9500621SS ST91000642SS ST9500622SS Drive capacity 1000 500 Gbytes[...]

12 Constellation.2 SAS Product Manual, Rev. H 5.2.2 Format command execution time for 512-byte sectors (minutes) 1TB models 500GB models Maximum (with verify) 384 188 Maximum (without verify) 192 94 Execution time measured from receipt of the last byte of the Command Descriptor Block (CDB) to the request for a Status Byte Transfer to the Initiator [...]

Constellation.2 SAS Product Manual, Rev. H 13 5.4 Prefetch/multi-segmented cache control The drive provides a prefetch (read look-ahead) and multi-segmented cache control algorithms that in many cases can enhance system performance. Cache refers to the drive buffer storage space when it is used in cache operations. To select this feature, the host [...]

14 Constellation.2 SAS Product Manual, Rev. H 5.5.1 Caching write data Write caching is a write operation by the drive that makes use of a drive buffer storage area where the data to be written to the medium is stored while the drive performs the Write command. If read caching is enabled (RCD=0), then data written to the medium is retained in the c[...]

Constellation.2 SAS Product Manual, Rev. H 15 6.0 Reliability specifications The following reliability specifications assume correct host and drive operational interface, including all inter- face timings, power supply voltages, environmental requirements and drive mounting constraints. 6.1 Error rates The error rates stated in this manual assume t[...]

16 Constellation.2 SAS Product Manual, Rev. H 6.1.3 Seek errors A seek error is defined as a failure of the drive to position the heads to the addressed track. After detecting an initial seek error, the drive automatically performs an error recovery process. If the error recovery process fails, a seek positioning error (Error code = 15h or 02h) wil[...]

Constellation.2 SAS Product Manual, Rev. H 17 Caution. The drive motor must come to a complete stop prior to changing the plane of operation. This time is required to insure data integrity. 6.2.4 S.M.A.R.T. S.M.A.R.T. is an acronym for Self-Monitoring Analysis and Reporting Technology. This technology is intended to recognize conditions that indica[...]

18 Constellation.2 SAS Product Manual, Rev. H S.M.A.R.T. measures error rates. All errors for each monitored attribute are recorded. A counter keeps track of the number of errors for the current interval. This counter is referred to as the Failure Counter. Error rate is the number of errors per operation. The algorithm that S.M.A.R.T. uses to recor[...]

Constellation.2 SAS Product Manual, Rev. H 19 6.2.6 Drive Self Test (DST) Drive Self Test (DST) is a technology designed to recognize drive fault conditions that qualify the drive as a failed unit. DST validates the functionality of the drive at a system level. There are two test coverage options implemented in DST: 1. Extended test 2. Short test T[...]

20 Constellation.2 SAS Product Manual, Rev. H 6.2.6.2.3 Short and extended tests DST has two testing options: 1. short 2. extended These testing options are described in the following two subsections. Each test consists of three segments: an electrical test segment, a servo test segment, and a read/verify scan segment. Short test (Function Code: 00[...]

Constellation.2 SAS Product Manual, Rev. H 21 6.2.7 Product warranty See Section 1.0 for warranty contact information. Shipping When transporting or shipping a drive, use only a Seagate-approved container. Keep your original box. Sea- gate approved containers are easily identified by the Seagate Approved Package label. Shipping a drive in a non-app[...]

22 Constellation.2 SAS Product Manual, Rev. H 7.0 Physical/electrical specifications This section provides information relating to the physical and electrical characteristics of the drive. 7.1 PowerChoice TM power management Drives using the load/unload architecture provide programmable power management to tailor systems for per- formance and great[...]

Constellation.2 SAS Product Manual, Rev. H 23 7.1.1 PowerChoice reporting methods PowerChoice TM provides these reporting methods for tracking purposes: Request Sense command reports • Current power condition • Method of entry Note. Processing the Request Sense command does not impact the drive’s power save state. Mode Sense command reports ([...]

24 Constellation.2 SAS Product Manual, Rev. H Table 2: 1000GB drive (Standard & SED model) DC power requirements[...]

Constellation.2 SAS Product Manual, Rev. H 25 Table 3: 500GB drive (Standard & SED model) DC power requirements [1] Measured with average reading DC ammeter. [2] Instantaneous +12V current peaks will exceed these values. [3] Power supply at nominal voltage. N (number of drives tested) = 6, 35 Degrees C ambient. [4] For +12 V, a –10% tolerance[...]

26 Constellation.2 SAS Product Manual, Rev. H General DC power requirement notes. 1. Minimum current loading for each supply voltage is not less than 1.7% of the maximum operating current shown. 2. The +5V and +12V supplies should employ separate ground returns. 3. Where power is provided to multiple drives from a common supply, careful considerati[...]

Constellation.2 SAS Product Manual, Rev. H 27 7.3.3 Current profiles The +12V (top) and +5V (bottom) current profiles for the Constellation drives are shown below. Figure 1. 1TB model current profiles[...]

28 Constellation.2 SAS Product Manual, Rev. H Note: All times and currents are typical. See Table 2 and 3 for maximum current requirements. Figure 2. 500GB model current profiles[...]

Constellation.2 SAS Product Manual, Rev. H 29 7.4 Power dissipation 1TB model drive in 3Gb operation Please refer to Table 2 for power dissipation numbers. To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 5). Locate the typical I/O rate for a drive in your system on the horizontal axis [...]

30 Constellation.2 SAS Product Manual, Rev. H 1TB model drive in 6Gb operation Please refer to Table 2 for power dissipation numbers. To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 6.). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the correspo[...]

Constellation.2 SAS Product Manual, Rev. H 31 500GB model drive in 3Gb operation Please refer to Table 3 for power dissipation numbers. To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 5). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the corresp[...]

32 Constellation.2 SAS Product Manual, Rev. H 500GB model drive in 6Gb operation Please refer to Table 3 for power dissipation numbers. To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 6.). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the corres[...]

Constellation.2 SAS Product Manual, Rev. H 33 7.5 Environmental limits Temperature and humidity values experienced by the drive must be such that condensation does not occur on any drive part. Altitude and atmospheric pressure specifications are referenced to a standard day at 58.7°F (14.8°C). Maximum wet bulb temperature is 82°F (28°C). 7.5.1 [...]

34 Constellation.2 SAS Product Manual, Rev. H 7.5.3 Effective altitude (sea level) a. Operating –200 to +10,000 feet (–61 to +3,048 meters) b. Non-operating –200 to +40,000 feet (–61 to +12,210 meters) 7.5.4 Shock and vibration Shock and vibration limits specified in this document are measured directly on the drive chassis. If the drive is [...]

Constellation.2 SAS Product Manual, Rev. H 35 d. Packaged Seagate finished drive bulk packs are designed and tested to meet or exceed applicable ISTA and ASTM standards. Volume finished drives will be shipped from Seagate factories on pallets to minimize freight costs and ease material handling. Seagate finished drive bulk packs may be shipped indi[...]

36 Constellation.2 SAS Product Manual, Rev. H 7.5.4.2 Vibration a. Operating—normal The drive as installed for normal operation, shall comply with the complete specified performance while subjected to continuous vibration not exceeding 5 - 500 Hz 0.5 Gs Vibration may be applied in the X, Y, or Z axis. Operating normal translational random flat pr[...]

Constellation.2 SAS Product Manual, Rev. H 37 chloride, and nitrate contaminants. Sulfur is found to be the most damaging. In addition, electronic components should never be exposed to condensing water on the surface of the printed circuit board assembly (PCBA) or exposed to an ambient relative humidity greater than 95%. Materials used in cabinet f[...]

38 Constellation.2 SAS Product Manual, Rev. H 7.6 Mechanical specifications Refer to Figure 9 for detailed mounting configuration dimensions. See Section 11.3, “Drive mounting.” Note. These dimensions conform to the Small Form Factor Standard documented in SFF-8201 and SFF-8223 found at www.sffcommittee.org . in mm in mm in mm Figure 9. Mountin[...]

Constellation.2 SAS Product Manual, Rev. H 39 8.0 About FIPS The Federal Information Processing Standard (FIPS) Publication 140-2 is a U.S. Government Computer Security Standard used to accredit cryptographic modules. It is titled 'Security Requirements for Cryptographic Modules (FIPS PUB 140-2)' and is issued by the National Institute of[...]

40 Constellation.2 SAS Product Manual, Rev. H Figure 10. Example of FIPS tamper evidence labels. Note. Image is for reference only, may not represent actual drive.[...]

Constellation.2 SAS Product Manual, Rev. H 41 9.0 About self-encrypting drives Self-encrypting drives (SEDs) offer encryption and security services for the protection of stored data, com- monly known as “protection of data at rest.” These drives are compliant with the Trusted Computing Group (TCG) Enterprise Storage Specifications as detailed i[...]

42 Constellation.2 SAS Product Manual, Rev. H 9.2.3 Default password When the drive is shipped from the factory, all passwords are set to the value of MSID. This 32-byte random value can only be read by the host electronically over the interface. After receipt of the drive, it is the responsi- bility of the owner to use the default MSID password as[...]

Constellation.2 SAS Product Manual, Rev. H 43 Three conditions must be met before the drive will allow the download operation: 1. The download must be an SED file. A standard (base) drive (non-SED) file will be rejected. 2. The download file must be signed and authenticated. 3. As with a non-SED drive, the download file must pass the acceptance cri[...]

44 Constellation.2 SAS Product Manual, Rev. H 10.0 Defect and error management Seagate continues to use innovative technologies to manage defects and errors. These technologies are designed to increase data integrity, perform drive self-maintenance, and validate proper drive operation. SCSI defect and error management involves drive internal defect[...]

Constellation.2 SAS Product Manual, Rev. H 45 The drive firmware error recovery algorithms consist of 20 levels for read recoveries and five levels for write. Each level may consist of multiple steps, where a step is defined as a recovery function involving a single re- read or re-write attempt. The maximum level used by the drive in LBA recovery i[...]

46 Constellation.2 SAS Product Manual, Rev. H 10.4 Background Media Scan Background Media Scan (BMS) is a self-initiated media scan. BMS is defined in the T10 document SPC-4 available from the T10 committee. BMS performs sequential reads across the entire pack of the media while the drive is idle. In RAID arrays, BMS allows hot spare drives to be s[...]

Constellation.2 SAS Product Manual, Rev. H 47 10.7 Idle Read After Write Idle Read After Write (IRAW) utilizes idle time to verify the integrity of recently written data. During idle periods, no active system requests, the drive reads recently written data from the media and compares it to valid write command data resident in the drives data buffer[...]

48 Constellation.2 SAS Product Manual, Rev. H 10.8.3 Identifying a Protection Information drive The Standard Inquiry provides a bit to indicate if PI is support by the drive. Vital Product Descriptor (VPD) page 0x86 provides bits to indicate the PI Types supported and which PI fields the drive supports checking. Note. For further details with respe[...]

Constellation.2 SAS Product Manual, Rev. H 49 11.0 Installation Constellation.2 disk drive installation is a plug-and-play process. There are no jumpers, switches, or termina- tors on the drive. SAS drives are designed to be used in a host system that provides a SAS-compatible backplane with bays designed to accommodate the drive. In such systems, [...]

50 Constellation.2 SAS Product Manual, Rev. H 11.2 Cooling Cabinet cooling must be designed by the customer so that the ambient temperature immediately surrounding the drive will not exceed temperature conditions specified in Section 7.5.1, "Temperature." The rack, cabinet, or drawer environment for the drive must provide heat removal fro[...]

Constellation.2 SAS Product Manual, Rev. H 51 11.3 Drive mounting Mount the drive using the bottom or side mounting holes. If you mount the drive using the bottom holes, ensure that you do not physically distort the drive by attempting to mount it on a stiff, non-flat surface. The allowable mounting surface stiffness is 80 lb/in (14.0 N/mm). The fo[...]

52 Constellation.2 SAS Product Manual, Rev. H 12.0 Interface requirements This section partially describes the interface requirements as implemented on Constellation.2 drives. Addi- tional information is provided in the SAS Interface Manual (part number 100293071). 12.1 SAS features This section lists the SAS-specific features supported by Constell[...]

Constellation.2 SAS Product Manual, Rev. H 53 12.2 Dual port support Constellation.2 SAS drives have two independent ports. These ports may be connected in the same or differ- ent SCSI domains. Each drive port has a unique SAS address. The two ports have the capability of independent port clocking (e.g. both ports can run at 6Gb/s or the first port[...]

54 Constellation.2 SAS Product Manual, Rev. H 12.3 SCSI commands supported Table 7 lists the SCSI commands supported by Constellation.2 drives. Table 7: Supported commands Command name Command code Supported Change Definition 40h N Compare 39h N Copy 18h N Copy and Verify 3Ah N Format Unit [1] [5] 04h Y DCRT bit supported Y DPRY bit supported N DSP[...]

Constellation.2 SAS Product Manual, Rev. H 55 Last n Deferred Errors or Asynchronous Events page (0Bh) N Last n Error Events page (07h) N Non-medium Error page (06h) Y Pages Supported list (00h) Y Read Error Counter page (03h) Y Read Reverse Error Counter page (04h) N Self-test Results page (10h) Y Start-stop Cycle Counter page (0Eh) Y Temperature [...]

56 Constellation.2 SAS Product Manual, Rev. H Read Capacity (16) 9Eh/10h Y Read Defect Data (10) 37h Y Read Defect Data (12) B7h Y Read Long 3Eh Y (non-SED drives only) Read Long (16) 9Eh/11h Y Reassign Blocks 07h Y Receive Diagnostic Results 1Ch Y Supported Diagnostics pages (00h) Y Translate page (40h) Y Release 17h Y Release (10) 57h Y Report LU[...]

Constellation.2 SAS Product Manual, Rev. H 57 [1] Constellation.2 drives can format to 512, 520 or 528 bytes per logical block. [2] Warning. Power loss during flash programming can result in firmware corruption. This usually makes the drive inoperable. [3] Reference Mode Sense command 1Ah for mode pages supported. [4] Y = Yes. Command is supported.[...]

58 Constellation.2 SAS Product Manual, Rev. H 12.3.1 Inquiry data Table 8 lists the Inquiry command data that the drive should return to the initiator per the format given in the SAS Interface Manual . Table 8: Constellation.2 inquiry data Bytes Data (hex) 0-15 00 00 xx** 12 8B 00 PP 0A 53 45 41 47 41 54 45 20 Vendor ID 16-31 [53 54 39 35 30 30 36 [...]

Constellation.2 SAS Product Manual, Rev. H 59 When power is applied to the drive, it takes saved values from the media and stores them as current val- ues in volatile memory. It is not possible to change the current values (or the saved values) with a Mode Select command before the drive achieves operating speed and is “ready.” An attempt to do[...]

60 Constellation.2 SAS Product Manual, Rev. H Table 9: Mode Sense data changeable and default values for 1TB model drives MODE DATA HEADER: 01 9a 00 10 01 00 00 10 BLOCK DESCRIPTOR: 00 00 00 00 74 70 6d b0 00 00 00 00 00 00 02 00 MODE PAGES: DEF 81 0a c0 14 ff 00 00 00 05 00 ff ff CHG 81 0a ff ff 00 00 00 00 ff 00 ff ff DEF 82 0e 00 00 00 00 00 00 [...]

Constellation.2 SAS Product Manual, Rev. H 61 Table 10: Mode Sense data changeable and default values for 500GB model drives MODE DATA HEADER: 01 9a 00 10 01 00 00 10 BLOCK DESCRIPTOR: 00 00 00 00 3a 38 60 30 00 00 00 00 00 00 02 00 MODE PAGES: DEF 81 0a c0 14 ff 00 00 00 05 00 ff ff CHG 81 0a ff ff 00 00 00 00 ff 00 ff ff DEF 82 0e 00 00 00 00 00 [...]

62 Constellation.2 SAS Product Manual, Rev. H 12.4 Miscellaneous operating features and conditions Table 11 lists various features and conditions. A “Y” in the support column indicates the feature or condition is supported. An “N” in the support column indicates the feature or condition is not supported. Table 11: Miscellaneous features Sup[...]

Constellation.2 SAS Product Manual, Rev. H 63 12.4.1 SAS physical interface Figure 13 shows the location of the SAS device connector J1. Figures 14 and 15 provide the dimensions of the SAS connector. Details of the physical, electrical, and logical characteristics are provided within this section. The operational aspects of Seagate’s SAS drives a[...]

64 Constellation.2 SAS Product Manual, Rev. H Figure 14. SAS device plug dimensions C OF DATUM B L 5.08 1.27 (6X) 1.27 (14X) 15.875 0.35MIN 15.875 33.43 0.05 B 4.90 0.08 0.84 0.05 (22X) 0.15 B P15 P1 S7 S1 SEE Detail1 0.30 0.05 (4X) 4.00 0.08 0.15 D 0.30 0.05 (2X) 41.13 0.15 B B C C A A 0.20 B 42.73 REF. C OF DATUM D L 1.10 R0.30 0.08 (4X) 2.00 (3X[...]

Constellation.2 SAS Product Manual, Rev. H 65 Figure 15. SAS device plug dimensions (detail) 6.10 Detail A 0.30 0.05 x 45 (5X) 0.40 0.05 X 45 (3X) CORING ALLOWED IN THIS AREA. 2.25 0.05 4.85 0.05 0.10 B E S14 S8 4.40 0.15 SEE Detail 2 3.90 0.15 SECTION A - A SECTION C - C A 0.35 0.05 45 R0.30 0.08 C 1.95 0.08 0.08 0.05 1.23 0.05 0.08 0.05 Detail 2 [...]

66 Constellation.2 SAS Product Manual, Rev. H 12.4.2 Physical characteristics This section defines physical interface connector. 12.4.3 Connector requirements Contact your preferred connector manufacturer for mating part information. Part numbers for SAS connectors will be provided in a future revision of this publication when production parts are [...]

Constellation.2 SAS Product Manual, Rev. H 67 12.4.6 SAS transmitters and receivers A typical SAS differential copper transmitter and receiver pair is shown in Figure 16. The receiver is AC cou- pling to eliminate ground shift noise. Figure 16. SAS transmitters and receivers 12.4.7 Power The drive receives power (+5 volts and +12 volts) through the[...]

68 Constellation.2 SAS Product Manual, Rev. H The Ready LED Out signal is designed to pull down the cathode of an LED. The anode is attached to the proper +3.3 volt supply through an appropriate current limiting resistor. The LED and the current limiting resis- tor are external to the drive. See Table 15 for the output characteristics of the LED dr[...]

Constellation.2 SAS Product Manual, Rev. H 69 Index Numerics 12 volt pins 67 5 volt pins 67 6 Gbps 68 A abort task set function 52 AC coupling 67 AC power requirements 23 ACA active status 62 ACA active, faulted initiator status 62 acoustics 36 active LED Out signal 67 actuator 9 assembly design 7 adaptive caching 62 Admin SP 41 AES-128 data encryp[...]

70 Constellation.2 SAS Product Manual, Rev. H description 7 DFE 68 dimensions 38 disk rotation speed 11 drive 36 drive characteristics 11 drive failure 16 Drive Locking 42 drive mounting 38 , 51 drive select 66 dual port support 53 E electrical description of connector 66 signal characteristics 67 specifications 22 electromagnetic compatibility 3 E[...]

Constellation.2 SAS Product Manual, Rev. H 71 L latency average rotational 11 , 12 Locking SP 41 LockOnReset 42 logical block address 13 logical block reallocation scheme 8 logical block size 8 , 12 logical segments 13 M maintenance 15 Makers Secure ID 41 mean time between failure. See MTBF media description 8 Media Pre-Scan 46 minimum sector inter[...]

72 Constellation.2 SAS Product Manual, Rev. H R radio interference regulations 3 Random number generator 42 RCD bit 13 read error rates 15 , 44 read/write data heads 11 receivers 67 recommended mounting 35 Recoverable Errors 15 recovered media data 15 reference documents 6 relative humidity 33 reliability 9 specifications 15 reliability and service[...]

Constellation.2 SAS Product Manual, Rev. H 73 U unformatted 9 Unrecoverable Errors 15 unrecovered media data 15 V vibration 34 , 36 W warranty 21 Z zero latency read 62 zone bit recording (ZBR) 8[...]

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