Seagate ST3146855LW Cheetah 15K.6 SAS Product Manual
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- Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 1
Product Manual Cheetah 15K.6 SAS ST3450856SS ST3300656SS ST3146356SS ST3450056SS (FDE) ST3300056SS (FDE) ST3146756SS (FDE) 100466193 Rev. B September 2008 - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 2
trademarks are the property of their respective owners. One gigabyte, or GB, equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment and formatting. Quantitative usage examples for various applications are for illustrative - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 3
Seek errors 16 5.1.4 Interface errors 16 5.2 Reliability and service 16 5.2.1 Annualized Failrue Rate (AFR) and Mean time 16 5.2.3 Hot plugging the drive 16 5.2.4 S.M.A.R.T 17 5.2.5 Thermal monitor 18 5.2.6 Drive Self Test (DST 19 5.2.7 36 Cheetah 15K.6 SAS Product Manual, Rev. B i - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 4
8.0 Installation 47 8.1 Drive orientation 47 8.2 Cooling 47 8.3 Drive mounting 49 8.4 Grounding 49 9.0 Interface requirements 51 9.1 SAS features 51 9.1.1 task management functions 51 9.1.2 task management responses 51 9.2 Dual port support 52 9.3 SCSI commands supported 53 9.3.1 Inquiry - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 5
describes Seagate Technology® LLC, Cheetah® SAS (Serial Attached SCSI) disk drives. Cheetah 15K.6 drives support the SAS Protocol specifications to the extent described in this manual. The SAS Interface Manual (part number 100293071) describes the general SAS characteristics of Cheetah 15K.6 and - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 6
2 Cheetah 15K.6 SAS Product Manual, Rev. B - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 7
The Cheetah 15K.6 SAS family complies with Seagate standards as noted in the appropriate sections of this manual and the Seagate SAS Interface Manual, part number 100293071. The Cheetah 15K.6 disk drive is a UL recognized component per UL1950, CSA certified to CAN/CSA C22.2 No. 950-95, and VDE - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 8
CE Marking and C-Tick Marking. The drive was tested in a representative system for Compatibility (EMC) Framework requirements of Australia's Spectrum Management Agency (SMA). Korean MIC If this model for all parts and materials for the disk drives documented in this publication. Current supplier - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 9
procedures are complied with. 2.4 Reference documents SCSI Commands Reference Manual Seagate part number: 100293068 SAS Interface Manual Seagate part number: 100293071 Applicable ANSI SAS documents SFF-8323 3.5" Drive Form Factor with Serial Connector SFF-8460 HSS Backplane Design - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 10
6 Cheetah 15K.6 SAS Product Manual, Rev. B - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 11
support the Serial Attached SCSI Protocol as described in the ANSI specifications, this document, and the SAS Interface Manual (part number 100293071) which describes the general interface characteristics of this drive. Cheetah 15K.6 drives with either SAS or SATA hard disk drives. This allows you to - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 12
drives have the following standard features: • 1.5 / 3 Gbit Serial Attached SCSI (SAS) interface • Integrated dual port SAS controller supporting the SCSI protocol • Support (queue) • Supports up to 32 to the drive • data buffer • Drive Self Test • for a drive that will drive • Supports start and - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 13
size is selectable at format time and must be one of the supported sizes listed in the table below. Seagate designs specify capacity points table in the SAS Interface Manual, part number 100293071. A value of zero in the Number of Blocks field indicates that the drive will not change the capacity - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 14
10 Cheetah 15K.6 SAS Product Manual, Rev. B - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 15
equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment and formatting. 4.2 Seek time See Section 9.4.1, "SAS physical interface" on page 62 and the SAS Interface Manual (part number 100293071) for additional timing details - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 16
connect/disconnect). 4.2.3 General performance characteristics Sustainable disk transfer rate*: Minimum Maximum 112 Mbytes/sec support the rates listed and no cable loss. 1 MB/sec = 1,000,000 bytes/sec 4.3 Start/stop time The drive accepts the commands listed in the SAS Interface Manual - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 17
Mode Page 02h (disconnect/reconnect control) in the SAS Interface Manual. The following is a simplified description of the prefetch/cache operation is not in any segment of the cache: 1. The drive fetches the requested logical blocks from the disk and transfers them into a segment, and then from - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 18
, the drive responds as it does for drive does not overwrite data drive force the drive to write bit = 0 enables prefetch. The drive does not use the Max Prefetch field drive enables prefetch of contiguous blocks from the disk when it senses that a prefetch hit will likely occur. The drive - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 19
rates stated in this manual assume the following: • The drive is operated per this specification using DC power as defined in this manual (see Section 6.2). • Errors Recoverable errors are those detected and corrected by the drive, and do not require user intervention. Recoverable Data errors use - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 20
= 04h) are classified as drive failures. 5.1.4 Interface errors An service You can enhance the reliability of Cheetah disk drives by ensuring that the drive the drive looses sync, the drive initiated link reset. The drive will drive carrier prior to inserting it into the system. Caution. The drive - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 21
occur. Forcing S.M.A.R.T. with the RTZ command resets the timer. Performance impact S.M.A.R.T. attribute data is saved to the disk so that the events that caused a predictive failure can be recreated. The drive measures and saves parameters once every two hours subject to an idle period on the - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 22
the drive drives drive. 2. Signals the host if the temperature exceeds a user-specified value. 3. Saves a S.M.A.R.T. data frame on the drive which exceeds the threatening temperature value. A temperature sensor monitors the drive standard. The drive temperature is reported drive threatening drive - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 23
condition. If the drive fails the test, remove it from service and return it to Seagate for service. 5.2.6.1 DST failure definition The drive will present a " Ready condition also qualifies the drive to be returned to Seagate as a failed drive. Cheetah 15K.6 SAS Product Manual, Rev. B 19 - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 24
Drive cannot read configuration tables from the disk In these conditions, the drive much of the drive as possible drive. Extended test drive entries When the drive begins DST, it . The drive reports 20 drive will store the log page to non- drive drive. The self the drive passed - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 25
authorized Seagate distributor to purchase additional boxes. Seagate recommends shipping by an air-ride carrier experienced in handling computer equipment. Product repair and return information Seagate customer service centers are the only facilities authorized to service Seagate drives. Seagate - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 26
22 Cheetah 15K.6 SAS Product Manual, Rev. B - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 27
requirements The voltage and current requirements for a single drive are shown below. Values indicated apply at the drive connector. Table 12: ST3450856SS DC power requirements Notes 76 1.93 0.87 4.36 0.63 0.04 0.64 1.19 0.67 1.21 1.14 2.74 Cheetah 15K.6 SAS Product Manual, Rev. B 23 - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 28
3 Gbit mode (Amps) (Amps) +5V +12V [2] ±5% ±5% [2] 0.54 0.63 0.90 1.76 1.07 3.96 0.63 0.04 0.60 1.06 0.65 1.08 1.16 2.44 24 Cheetah 15K.6 SAS Product Manual, Rev. B - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 29
ST3146356SS 3 Gbit mode (Amps) (Amps) +5V +12V [2] ±5% ±5% [2] 0.54 0.53 0.68 1.74 0.88 3.82 0.63 0.04 0.61 0.95 0.64 0.96 1.16 2.38 Cheetah 15K.6 SAS Product Manual, Rev. B 25 - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 30
drive power requirements should be noted. Where multiple units are powered on simultaneously, the peak starting current must be available to each device. 4. Parameters, other than spindle start, are measured after a 10-minute warm up. 5. No terminator power. 26 Cheetah 15K.6 SAS Product Manual - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 31
a band from DC to 10 MHz. Maximum allowed noise values given below are peak-to-peak measurements and apply at the drive power connector. +5V = 250 mV pp from 0 to 100 kHz to 20 MHz. +12V = 800 mV pp Tables 12, 14, and 16 for maximum current requirements. Cheetah 15K.6 SAS Product Manual, Rev. B 27 - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 32
Figure 1. Typical 450GB current profiles Figure 2. Typical 300GB current profiles 28 Cheetah 15K.6 SAS Product Manual, Rev. B - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 33
Figure 3. Typical 146GB current profiles Cheetah 15K.6 SAS Product Manual, Rev. B 29 - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 34
operations, refer to the following I/O rate curve (see Figure 4). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the corresponding +5 volt current, +12 volt current, and power vs. input/output operations per second 30 Cheetah 15K.6 SAS Product Manual, Rev. B - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 35
, refer to the following I/O rate curve (see Figure 4). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the corresponding +5 volt current, +12 volt current, current and power vs. input/output operations per second Cheetah 15K.6 SAS Product Manual, Rev. B 31 - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 36
operations, refer to the following I/O rate curve (see Figure 4). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the corresponding +5 volt current, +12 volt current, and power vs. input/output operations per second 32 Cheetah 15K.6 SAS Product Manual, Rev. B - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 37
, refer to the following I/O rate curve (see Figure 4). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the corresponding +5 volt current, +12 volt current, current and power vs. input/output operations per second Cheetah 15K.6 SAS Product Manual, Rev. B 33 - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 38
operations, refer to the following I/O rate curve (see Figure 4). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the corresponding +5 volt current, +12 volt current, and power vs. input/output operations per second 34 Cheetah 15K.6 SAS Product Manual, Rev. B - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 39
, refer to the following I/O rate curve (see Figure 4). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the corresponding +5 volt current, +12 volt current, current and power vs. input/output operations per second Cheetah 15K.6 SAS Product Manual, Rev. B 35 - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 40
met, the drive meets all specifications over a 41°F to 131°F (5°C to 55°C) drive ambient temperature range and HDA case is provided, place the drive in its final mechanical configuration, perform that the drive is packaged in the shipping container designed by Seagate for use with drive. HDA Temp - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 41
to all conditions of handling and transportation. This includes both isolated drives and integrated drives. The drive subjected to nonrepetitive shock not exceeding the three values below, shall half sinewave) Shock may be applied in the X, Y, or Z axis. Cheetah 15K.6 SAS Product Manual, Rev. B 37 - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 42
d. Packaged disk drives shipped as loose load (not palletized) general freight will be packaged to withstand drops from heights as defined from 48 inches (1,070 mm) against a concrete floor or equivalent. Z Y X X Z Y Figure 11. Recommended mounting 38 Cheetah 15K.6 SAS Product Manual, Rev. B - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 43
will not be any discrete tones more than 10 dB above the masking noise on typical drives when measured according to Seagate specification 30553-001. There will not be any tones more than testing cannot duplicate every potential application environment. Cheetah 15K.6 SAS Product Manual, Rev. B 39 - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 44
2.1.1.1. 6.5 Mechanical specifications Refer to Figure 12 for detailed physical dimensions. See Section 8.3, "Drive mounting." Height: Width: Depth: 1.028 in 4.010 in 5.787 in 26.11 ST3300056SS ST3146356SS: 1.487 pounds 0.674 kilograms ST3146756SS 40 Cheetah 15K.6 SAS Product Manual, Rev. B - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 45
.17 (5.164) 85.60 (3.370) 41.15 (1.620) 2X 29.21 (2X 1.150) 4.57 MIN BLIND ( .18 MIN BLIND) 4.22 X 90 ( .166 X 90 ) 0.36 ( .014) DRIVE CENTER LINE 3.50 +/- .38 (.138 +/- .015) 0.13 (.005) 0.13 (.005) 0.25 (.010) Figure 12. Physical dimensions 36.37 (1.432) 0.99 (.039) 0.41 (.016) Cheetah 15K - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 46
42 Cheetah 15K.6 SAS Product Manual, Rev. B - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 47
mode page. Error recovery and defect management may involve using several SCSI commands described in the SAS Interface Manual. The drive implements selectable error recovery time limits required in video applications. The error recovery scheme supported by the drive provides a way to control the - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 48
the default setting could result in degradation of the unrecovered error rate which may exceed the value given in this product manual. A setting of zero (0) will result in the drive not performing error recovery. For example, suppose the read/write recovery page has the RC bit set to 0, read retry - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 49
drive. Status returned by the drive to the initiator is described in the SAS Interface Manual. Status reporting plays a role in systems error management BMS interrupts immediately to service host commands from the the data was properly written to the disk. Note. During Pre-Scan write verify - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 50
locations on a subsequent write command. Sites are marked for DAR during read operations performed by the drive. When a write command is received for an LBA marked for DAR, the auto-reallocation process is , the sector is re-mapped to a spare location. 46 Cheetah 15K.6 SAS Product Manual, Rev. B - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 51
system using the instructions provided by the host system. This connects the drive directly to your system Drive orientation The drive may be mounted in any orientation. All drive performance characterizations, however, have been done with the drive in horizontal (disks level) and vertical (drive - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 52
flows in the direction shown or in reverse direction (side to side) Figure 13. Air flow Above unit Under unit 48 Cheetah 15K.6 SAS Product Manual, Rev. B - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 53
you mount the drive using the bottom holes, ensure that you do not physically distort the drive by attempting to in the drive and cannot be separated by the user. The equipment in which the drive is mounted electrically isolating) method of mounting the drive in the host equipment. Increased - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 54
50 Cheetah 15K.6 SAS Product Manual, Rev. B - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 55
SAS Interface Manual (part number 100293071). 9.1 SAS features This section lists the SAS-specific features supported by Cheetah 15K.6 drives. 9.1.1 task management functions Table 19 lists the SAS task management functions supported. Table 19: SAS task management functions supported Task - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 56
support: • Concurrent port transfers-The drive supports receiving COMMAND, TASK management transfers on both ports at the same time. • Full duplex-The drive supports sending XFER_RDY, DATA and RESPONSE transfers while receiving frames on both ports. 52 Cheetah 15K.6 SAS Product Manual, Rev. B - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 57
by Cheetah 15K.6 drives. Table 21: Commands supported by Cheetah 15K.6 SAS family drives Command name Change Definition Compare Copy Copy and Verify Format Unit [1] DPRY bit supported DCRT bit supported STPF bit supported IP bit supported DSP bit supported IMMED bit supported VS (vendor specific - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 58
drives (continued) Command name Non-medium Error page (06h) Pages Supported disk Drive Geometry page (04h) Unit Attention page (00h) Verify Error Recovery page (07h) Xor Control page (10h) Command code 15h 55h 1Ah Supported modes 0, 2, 3, Ah and Bh supported) 3Ch Y Read Capacity 25h Y - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 59
(modes 5, 7, Ah and Bh supported) [3] Write Extended DPO bit Command code 07h 1Ch 17h 57h 03h 16h 56h 01h 31h 30h 32h 0Bh 2Bh 1Dh 33h 1Bh 35h 00h 2Fh 0Ah 2Eh 3Bh 2Ah Supported Y Y Y Y Y Y Y Y Y Y Y Y N Y Y N Y N N N Y Y Y Y Y N Y Y Y Y Y Y Y Y Y Y Y Y Cheetah 15K.6 SAS Product Manual, Rev. B 55 - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 60
XDWrite XPWrite Command code 3Fh 41h 52h 50h 51h Supported Y Y Y N N N N N [1] Cheetah 15K.6 drives can format to 512, 520, 524, or 528 drive inoperable. [3] Reference Mode Sense command 1Ah for mode pages supported. [4] Y = Yes. Command is supported. N = No. Command is not supported. A = Support - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 61
Inquiry command data that the drive should return to the initiator per the format given in the SAS Interface Manual. Table 22: Inquiry data 65 64 20 * Copyright year (changes with actual year). ** SCSI Revision support. Refer to the appropiate SPC release documentation for definitions. PP 10 = - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 62
installed from saved or default values after a power on reset, hard reset, or Bus Device Reset message. 4. Changeable values Changeable drive in response to the Mode Sense command pages for SCSI implementation (see the SAS Interface Manual ). Definitions: DEF = Default value. Standard OEM drives - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 63
c0 0f 00 00 00 READ CAPACITY DATA: READ BUFFER 0 1 2 3 4 5 6 7 8 9 A B C D E F ASCII 000000: 34 65 F8 6F 00 00 02 00 4e.o.... Cheetah 15K.6 SAS Product Manual, Rev. B 59 - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 64
c0 0f 00 00 00 READ CAPACITY DATA: READ BUFFER 0 1 2 3 4 5 6 7 8 9 A B C D E F ASCII 000000: 22 EC B2 5B 00 00 02 00 60 Cheetah 15K.6 SAS Product Manual, Rev. B - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 65
b7 c0 0f 00 00 00 READ CAPACITY DATA: READ BUFFER 0 1 2 3 4 5 6 7 8 9 A B C D E F ASCII 000000: 11 17 73 2F 00 00 02 00 s/.... Cheetah 15K.6 SAS Product Manual, Rev. B 61 - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 66
SMP = 1 in Mode Select command needed to save RPL and rotational offset bytes Table 24: Miscellaneous status Supported Y Y Y Y Y Y Y Y N N Status Good Check condition Condition met/good Busy Intermediate/ 16 provide the dimensions of the SAS device. 62 Cheetah 15K.6 SAS Product Manual, Rev. B - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 67
Details of the physical, electrical, and logical characteristics are provided within this section. The operational aspects of Seagate's SAS drives are provided in the SAS Interface Manual.. SAS Interface connector Figure 14. Physical interface Cheetah 15K.6 SAS Product Manual, Rev. B 63 - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 68
(6X) 5.08 B 0.84 0.05 (22X) 0.15 B 4.90 0.08 P15 P1 S1 S7 CL OF DATUM B Figure 15. SAS connector dimensions 64 Cheetah 15K.6 SAS Product Manual, Rev. B - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 69
dimensions SECTION B - B 9.4.2 Physical characteristics This section defines physical interface connector. 9.4.3 Connector requirements The SAS connector on the drive complies with SFF-8482. Contact your preferred connector manufacturer for mating part information. The SAS device connector - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 70
Port B_out Diff output pair S13* +Port B_out S14 Port B Ground * - Short pin to support hot plugging NC - No connection in the drive. Pin Signal name Signal type P1* NC (reserved 3.3Volts) P2* NC (reserved 3.3Volts) P3 * 12 Volts P15* 12 Volts 66 Cheetah 15K.6 SAS Product Manual, Rev. B - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 71
type and signal name information. 9.5.1 Ready LED Out The Ready LED Out signal is driven by the drive as indicated in Table 26. Table 26: Ready LED Out conditions Normal command activity Ready LED Meaning 0.5 seconds) Toggles on/off Toggles on/off Cheetah 15K.6 SAS Product Manual, Rev. B 67 - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 72
Output voltage -100 µA < IOH < 100 µA 0 ≤ VOL ≤ 0.225 V 9.5.2 Differential signals The drive SAS differential signals comply with the intra-enclosure (internal connector) requirements of the SAS standard. Table 28 defines of ± 7 standard deviations. 68 Cheetah 15K.6 SAS Product Manual, Rev. B - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 73
of eye mask before adding sinusoidal jitter Outline of eye mask after adding sinusoidal jitter Figure 19. Receive tolerance eye mask Cheetah 15K.6 SAS Product Manual, Rev. B 69 - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 74
= 1.5 x 10 9 for 1.5 Gbps FNOM = 3.0 x 10 9 for 3.0 Gbps 1.0 0.1 0 FNOM / 25,000 FNOM / 1,667 Frequency (in kHz) Figure 20. Sinusoidal jitter mask 70 Cheetah 15K.6 SAS Product Manual, Rev. B - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 75
measurements. The OOB sequence is performed at signal voltage levels corresponding to the lowest supported transfer rate. Table 29 specifies the signal characteristics. Table 29: Transmitter signal times and the idle times of an OOB signal. Cheetah 15K.6 SAS Product Manual, Rev. B 71 - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 76
average of the individual events is the measure of the asymmetry. Jitter peak-to-peak measured < (maximum total jitter - |Asymmetry|). 72 Cheetah 15K.6 SAS Product Manual, Rev. B - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 77
test pattern (CJTPAT) The CJTPAT within a compliant protocol frame is used for all jitter testing unless otherwise specified. See the SAS Interface Manual for definition of the required pattern on the physical link and information regarding special considerations for scrambling and running disparity - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 78
to homogenous ground applications (e.g., between devices within an enclosure or rack, or between enclosures interconnected by a common ground return or ground plane). 9.5.2.4.1 Transmitter characteristics The drive are D.C. coupled. 74 Cheetah 15K.6 SAS Product Manual, Rev. B - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 79
nF 50 ohm Tx+ TCTF Probe points 10 nF 50 ohm Tx- SAS internal connector Figure 21. Compliance interconnect test load Cheetah 15K.6 SAS Product Manual, Rev. B 75 - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 80
for 1.5 Gbps ISI loss > 2.0 dB -5.4 dB 0.15 0.75 Sample compliance interconnect Frequency (GHz) 1.5 Figure 24. ISI loss example at 1.5 Gbps 76 Cheetah 15K.6 SAS Product Manual, Rev. B - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 81
9.5.2.5 Receiver characteristics The drive receiver is A.C. coupled. The receive network terminates the TxRx connection by a 100 ohm equivalent impedance as specified in table phy. The additional jitter reduces the eye opening in both voltage and time. Cheetah 15K.6 SAS Product Manual, Rev. B 77 - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 82
78 Cheetah 15K.6 SAS Product Manual, Rev. B - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 83
www.seagate.com/support/service/index.html mySeagate my.seagate.com is the industry's first Web portal designed specifically for OEMs and distributors. It provides self-service access to critical applications, personalized content and the tools that allow our partners to manage their Seagate account - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 84
Operations Warranty Service Seagate offers worldwide customer support for Seagate products. Seagate distributors, OEMs and other direct customers should contact their Seagate Customer Service Operations (CSO) representative for warrantyrelated issues. Resellers or end users of drive products should - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 85
CRC error 16 Current profiles 27 customer service 21 D DAR 46 data heads read management 43 defects 43 Deferred Auto-Reallocation 46 deferred error handling 62 description 7 dimensions 40 disc rotation speed 11 drive 39 drive characteristics 11 drive mounting 40, 49 drive select 66 dual port support - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 86
write data 11 heat removal 47 heat source 47 host equipment 49 hot plugging the drive 16 humidity 37 humidity limits 36 I Idle Read After Write 46 inquiry data 57 installation 47 interface commands supported 53 error rate 15 errors 16 illustrated 63 physical 62 requirements 51 intermediate/condition - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 87
37 Cheetah 15K.6 SAS Product Manual, Rev. B reliability 9 specifications 15 reliability and service 16 repair and return information 21 66 physical interface 62 task management functions 51 SAS documents 5 SAS Interface Manual 3, 5 SCSI interface commands supported 53 seek error defined 16 rate - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 88
task set 51 Clear ACA 51 Clear task set 51 terminate task 51 task management response codes 51 Function complete 00 51 Function not supported 05 51 Function reject 04 51 task set full status 62 technical support services 79 temperature 36, 47 limits 36 non-operating 36 regulation 3 See also cooling - Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 89
- Seagate ST3146855LW | Cheetah 15K.6 SAS Product Manual - Page 90
Seagate Technology LLC 920 Disc Drive, Scotts Valley, California 95066-4544, USA Publication Number: 100466193, Rev. B, Printed in USA
Product Manual
Cheetah 15K.6 SAS
100466193
Rev. B
September 2008
ST3450856SS
ST3300656SS
ST3146356SS
ST3450056SS (FDE)
ST3300056SS (FDE)
ST3146756SS (FDE)