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68

Barracuda 2LP Product Manual, Rev. D

11.6

DC cable and connector

Note. This section applies only to N/ND/W/WD models. WC and DC models

do not have a 4-pin power connector and do not use DC power cables.

The drive receives DC power through a 4-pin connector mounted at the rear
of the main PCB. Recommended part numbers of the mating connector are
listed below, but equivalent parts may be used.

Table 13. Mating connector parts

Type of cable

Connector

Contacts (20-14 AWG)

14 AWG

AMP 1-480424-0

AMP 60619-4 (loose piece)
AMP 61117-4 (strip)

Note. The output of a power supply must meet SELV (safety extra low

voltage) as defined in IEC 950.

Pins

1

+12V DC

2

+12V DC return

3

+5V DC return

4

+5V DC

11.7

SCSI physical interface

Figures 26, 27, and 28 illustrate the physical interface on Barracuda 2LP
drives. Locations of the DC power connector, the SCSI interface connector,
and the drive select and option select headers are shown.

Details of the physical, electrical, and logical characteristics are given below.
The SCSI operational aspects of Seagate drive interfaces are provided in the
SCSI-2 Interface Product Manual.

J2

J4

SCSI I/O

Connector

DC Power
Connector

ST31250N and
ST32550N
J1 Connector

ST31250ND and
ST32550ND
J1 Connector

Figure 26. ST31250N/ND and ST32550N/ND physical interface

1

2

3

4

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Содержание BARRACUDA 2LP

Страница 1: ...Barracuda 2LP Disc Drive ST31250N ND ST31250W WD ST31250WC DC ST32550N ND ST32550W WD ST32550WC DC Product Manual Volume 1...

Страница 2: ......

Страница 3: ...Barracuda 2LP Disc Drive ST31250N ND ST31250W WD ST31250WC DC ST32550N ND ST32550W WD ST32550WC DC Product Manual Volume 1...

Страница 4: ...demarks of Seagate Technology Inc Barracuda is a trademark of Seagate Technology Inc Other product names are registered trademarks or trademarks of their owners Seagate reserves the right to change wi...

Страница 5: ...79 Revision status summary sheet Sheets Revision Date Writer Engineer Affected A 7 14 94 L Newman J Olson All B 9 21 94 L Newman J Olson 36 37 43 51 57 61 64 66 C 3 20 95 L Newman J Olson 1 9 12 14 24...

Страница 6: ......

Страница 7: ...me 13 5 2 2 Format drive command execution time 13 5 3 General performance characteristics 14 5 4 Start stop time 15 5 5 Prefetch multi segmented cache control 15 5 6 Caching write data 16 5 7 Synchro...

Страница 8: ...42 8 0 Media characteristics 43 8 1 Media description 43 9 0 Defect and error management 45 9 1 Defects and errors 45 10 0 Option configuration headers 47 10 1 Drive ID option select headers 47 10 1...

Страница 9: ...nt locations 25 Figure 9 JYHX temperature measurement locations 26 Figure 10 KYHX temperature measurement locations 27 Figure 11 ZYHX temperature measurement locations 28 Figure 12 PYJX temperature me...

Страница 10: ...a ST32550 default values ASA I SCSI 1 implementation 63 Table 7 Mode sense data ST31250 default values ASA I SCSI 2 implementation 64 Table 8 Mode sense data ST32550 default values ASA I SCS 2 impleme...

Страница 11: ...drivessupportthesmallcomputersysteminterface 2 SCSI 2 as describedintheANSISCSI andSCSI 2interfacespecificationstotheextent describedinthismanual TheSCSI 2InterfaceProductManual part number 77738479 d...

Страница 12: ...2 Barracuda 2LP Product Manual Rev D...

Страница 13: ...ive 93 68 EEC of 22 July 1993 Seagateusesanindependentlaboratorytoconfirmcompliancetotheabove directives Drives are tested in representative systems for typical applica tions The selected system repre...

Страница 14: ...4 Barracuda 2LP Product Manual Rev D...

Страница 15: ...al characteristics of the targets logical block addressing is used The head and disc assembly HDA is sealed at the factory Air circulates within the HDA through a non replaceable filter to maintain a...

Страница 16: ...tic shipping lock prevents potential damage to the heads and discs The shipping lock disengages when power is applied to the drive and the head load process begins Barracuda drives decode track 0 loca...

Страница 17: ...s required Dedicated head landing zone Automatic shipping lock Automatic thermal compensation Embedded Grey Code track address to eliminate seek errors Self diagnostics performed at power on 1 1 inter...

Страница 18: ...anel green lens part number 73497151 Thestandardfrontpanelisblackplastic Youmayorderothercolors Each panel has a single rectangular green LED indicator lens that when glowing indicates the drive is se...

Страница 19: ...ith a jumper see Section 10 1 External terminators are required for ST31250ND ST31250WD ST31250WC ST31250DC ST32550ND ST32550WD ST32550WC and ST32550DC drives These external terminators must be provid...

Страница 20: ...10 Barracuda 2LP Product Manual Rev D...

Страница 21: ...2 2 provides drive format execution times Refer to Table 22 in Section 11 10 and to the SCSI 2 Interface Product Manual part number 77738479 for additional timing details ASA I thermal calibration All...

Страница 22: ...riodafterthepower up resetcalibrationbeforeinitiating subsequent thermal calibrations H Number of heads in the drive After the drive has cycled once through all of the heads H at the N1 time interval...

Страница 23: ...ete command Seek to TCAL cyl and select next head Hold wait for next command Write Read Miss command Read Sequential command Independent 10 Minute Periodic Abortive Read Lookahead Timer Figure 3 ASA I...

Страница 24: ...ST31250W WD WC DC and ST32550W WD WC DC Sector sizes Default 512 byte data blocks Variable in even sector sizes 180 to 4 096 bytes Read write consecutive sectors on a track Yes Flaw reallocation perf...

Страница 25: ...nterface Product Manual Default is prefetch and cache operation enabled Of the 512 Kbytes physical buffer space approximately 480 Kbytes can be used as a cache The cache can be divided into logical se...

Страница 26: ...erred During a prefetch the drive crosses a cylinder boundary to fetch data only if the Discontinuity DISC bit is set to1in bit 4 of byte 2 of the Mode Select parameters page 8h Default is zero for bi...

Страница 27: ...Drive n 5V RT Sync Interface System Interface J4 Pin 1 on N ND drives J4 Pin 6 on WC DC drives SSREF J5 Pin 11 on W WD drives J4 Pin 2 on N ND drives J5 Pin 12 on W WD drives J4 Pin 1 on N ND drives...

Страница 28: ...se error while synchronized Figure 5 Synchronized reference signal characteristics SCSI interface factors The Rotational Position Locking RPL field in byte 17 bits 0 and 1 of the Rigid Disc Drive Geom...

Страница 29: ...cts 40h FFh or 1 4 of a revolution lagging skew 80h selects 1 2 of a revolution lagging skew etc Since the drive supports all offset values from 0 to 255 values sent by the initiator are not rounded o...

Страница 30: ...20 Barracuda 2LP Product Manual Rev D...

Страница 31: ...1 Environmental interference When evaluating system operation under conditions of electromagnetic interference EMI the performance of the drive within the system is considered acceptable if the drive...

Страница 32: ...average local disc drive ambient temperature of 95 F 35 C or less Short term excursions up to the specification limits 122 F 50 C of the operating environment will not affect MTBF performance The foll...

Страница 33: ...t Under unit Note Air flows in the direction shown back to front or in reverse direction front to back Above unit Under unit Note Air flows in the direction shown or in reverse direction side to side...

Страница 34: ...extended periods of time Doing so will reduce product reliability Air flow cooling ST31250N and ST32550N single ended drives MTBF 800k hours Card Component Reference case temperature C WYGX ADC 1 49...

Страница 35: ...57 The air flow pattern with which the temperature guidelines above were generated is shown in Figure 6 opposite direction Local average air velocity was 0 61 msec 120 lfpm and inlet air temperature...

Страница 36: ...4 57 The air flow pattern with which the temperature guidelines above were generated is shown in Figure 6 opposite direction Local average air velocity was 0 61 msec 120 lfpm and inlet air temperatur...

Страница 37: ...4 57 The air flow pattern with which the temperature guidelines above were generated is shown in Figure 6 opposite direction Local average air velocity was 0 61 msec 120 lfpm and inlet air temperatur...

Страница 38: ...er 4 57 The air flow pattern with which the temperature guidelines above were generated is shown in Figure 6 opposite direction Local average air velocity was 0 61 msec 120 lfpm and inlet air temperat...

Страница 39: ...s above were generated is shown in Figure 6 opposite direction Local average air velocity was 0 61 msec 120 lfpm and inlet air temperature to the drive was 30 C 86 F plus a 5 C temperature rise in the...

Страница 40: ...een low level formatted at the factory and does not need to be reformatted 6 2 7 Service tools No special tools are required for site installation or recommended for site maintenance Refer to Section...

Страница 41: ...s connector Maintain these ground connections during and after con necting the device to the bus b If you are removing the device maintain its power ground and logic ground connection for at least 1 m...

Страница 42: ...32 Barracuda 2LP Product Manual Rev D...

Страница 43: ...ent Typical DC X 1 10 0 91 0 57 1 13 0 57 Maximum DC 3 1 0 93 0 60 1 17 0 60 Maximum peak AC 3 1 0 1 56 1 95 1 56 Track following at OD DC X 1 0 91 0 5 0 99 0 50 ID DC X 1 0 88 0 51 0 96 0 51 Read tra...

Страница 44: ...See Section 11 7 3 4 12 All power saving features enabled ASA II code only 13 Seeking is defined as a third stroke seek at OD A command is issued every 20 msec 14 Read track is defined as repeat reads...

Страница 45: ...ME S 12V CURRENT A T6 1 9 Figure 14 Barracuda 2LP drives typical 12V current profiles T0 Power is applied to the drive T1 Controller self tests are performed T2 Thespindlebeginstoaccelerateundercurren...

Страница 46: ...is based on operating at a local ambient temperature of 95 F 35 C Occasional excursions to drive ambient temperatures of 122 F 50 C may occur without impact to specifiedMTBF Theenclosureforthedrivesh...

Страница 47: ...ration does not incur physical damage while subjected to intermittent shock not exceeding 10 Gs at a maximum duration of 11 msec half sinewave Shockoccurringatabnormallevelsmaydegradeoperatingperforma...

Страница 48: ...Non operating The limits of non operating vibration apply to all conditions of handling and transportation This includes both isolated drives and integrated drives The drive does not incur physical d...

Страница 49: ...4 000 0 250 2 375 3 750 2 370 1 750 0 181 0 340 0 190 0 015 1 100 4 100 146 05 101 60 25 40 15 87 101 60 6 35 60 32 95 25 60 20 44 45 4 59 8 64 4 83 0 381 27 94 104 14 A B C D E F G H J K L M N P R S...

Страница 50: ...5 50 13 13 25 25 25 50 38 38 25 25 25 50 max T Notes 1 2 3 4 Mounting holes three on each side 6 32 UNC Max screw length into side of drive 0 15 in 3 81 mm Screw tightening torque 6 0 in lb 675 NM max...

Страница 51: ...25 25 25 max Notes 1 2 3 4 5 Mounting holes three on each side 6 32 UNC Max screw length into side of drive 0 15 in 3 81 mm Screw tightening torque 6 0 in lb 675 NM max with minimum thread engagement...

Страница 52: ...inted circuit boards PCBs to meet the requirements of Section 6 2 2 7 6 3 Drive Mounting Mount the drive using the bottom or side mounting holes If you are mounting the drive using the bottom holes en...

Страница 53: ...the media used in Barracuda 2LP disc drives 8 1 Media description The media used on the drive has a diameter of approximately 95 mm 3 7 inches The aluminum substrate is coated with a thin film magnet...

Страница 54: ...44 Barracuda 2LP Product Manual Rev D...

Страница 55: ...briefly outlined in this section References to other sections are provided when necessary 9 1 Defects and errors Identified defects are recorded on the drive s defects list referred to as the primary...

Страница 56: ...46 Barracuda 2LP Product Manual Rev D...

Страница 57: ...re19illustratesST31250N NDandST32550N ND jumperconnectors J2 J4 ST31250N and ST32550N J1 Connector ST31250ND and ST32550ND J1 Connector SCSI ID 1 SCSI ID 2 SCSI ID 3 SCSI ID 4 SCSI ID 5 SCSI ID 6 SCSI...

Страница 58: ...D and ST32550ND J1 1 3 Terminator power to the SCSI bus ST31250N ND and J2 1 2 Reserved ST32550N ND 3 4 Reserved 5 6 Disable SCSI parity 7 8 Write protect 9 10 Enable motor start Jumper installed caus...

Страница 59: ...Barracuda 2LP Product Manual Rev D 49 7 8 SCSI ID bit 0 9 10 SCSI ID bit 1 11 12 SCSI ID bit 2 13 14 Reserved 15 16 Reserved 17 18 Reserved 19 20 Reserved See Figure 19 to set the SCSI ID...

Страница 60: ...able Motor Start Pin 2 Delay Motor Start Term power from drive default J1 Pin 1 Pin 2 Pin 6 Pin 4 Pin 2 Pin 1 Pin 3 Pin 1 ST31250WD and ST32550WD ST31250W and ST32550W Term power to SCSI Bus default T...

Страница 61: ...r to the SCSI bus ST31250W WD and J2 1 2 Reserved ST32550W WD 3 4 Reserved 5 6 Disable SCSI parity 7 8 Write protect 9 10 Enable motor start Jumper installed causes the drive to wait for the Start Uni...

Страница 62: ...ST32550W drives 10 Ground 11 5 volts 12 No connection 13 20 Reserved J5 1 2 SCSI ID bit 0 3 4 SCSI ID bit 1 5 6 SCSI ID bit 2 7 8 SCSI ID bit 3 9 10 Remote unit active LED connector Pin 9 cathode pin...

Страница 63: ...in 2 Disable SCSI Parity Write Protect J2 Pin 1 Enable Motor Start Pin 2 Delay Motor Start Reserved No connection Reserved SCSI I O Connector SCA Pin 1 Pin 1 Pin 1 End Figure 21 ST31250WC DC and ST325...

Страница 64: ...5 16 Reserved 17 18 Reserved J4 1 SCSI ID bit 0 no jumper 0 yes jumper 1 2 Fault LED pin 3 SCSI ID bit 1 no jumper 0 yes jumper 1 4 Vendor unique 5 SCSI ID bit 2 no jumper 0 yes jumper 1 6 SSREF spind...

Страница 65: ...nal SSREF is an output if the drive is configured as a master and is an input otherwise The reference index signal is connected from drive to drive in a daisy chain fashion as shown in Figure 4 10 2 1...

Страница 66: ...dertypeconnector Onlypins5and6areused for connecting the reference index signal cable as shown in Figure 19 Pin 6 is SSREF and pin 5 is ground 787 19 99 mm 079 2 mm 079 2 mm 708 17 983 mm J4 Figure 23...

Страница 67: ...and ST32550WC DC configuration select header 10 3 Grounding Signal ground PCB and HDA ground are connected together in the Barracuda 2LP family drives Do not separate this connection Maximizing the co...

Страница 68: ...58 Barracuda 2LP Product Manual Rev D...

Страница 69: ...06h Y Y Y Abort tag 0Dh Y Y Y Bus device reset 0Ch Y Y Y Clear queue 0Eh N Y Y Command complete 00h Y Y Y Continue I O Process 12h N N Y Disconnect 04h Y Y Y Extended messages 01h Y Y Y Identify 80h F...

Страница 70: ...ented Operating Def Page N Y Y Jumper Settings Page N Y Y Unit Serial Number Page N Y Y Vital Product Data Page N Y Y Lock Unlock Cache 36h N N N Log Select 4Ch N N N Log Sense 4Dh N N N Mode Select 1...

Страница 71: ...ation N N N Third Party Reserve Y Y Y Reserve 10 56h N Y Y Rezero Unit 01h Y Y Y Search Data Equal 31h N N N Search Data High 30h N N N Search Data Low 32h N N N Seek 0Bh Y Y Y Seek Extended 2Bh Y Y Y...

Страница 72: ...00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 64 79 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 80 95 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 96 111 00 43 6F 70 79 72 69 67 68 74 20 28...

Страница 73: ...04 84 12 00 0E 80 05 00 00 00 00 00 00 00 00 00 00 00 00 00 00 CHG 04 84 12 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 03 FF 00 DEF 08 88 12 10 00 FF FF 00 00 00 4F 01 3C 80 03 00 00 00 00 00 00 CHG...

Страница 74: ...00 00 10 00 CHG 0C 8C 16 40 00 00 00 FF FF 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 DEF 00 80 02 00 00 CHG 00 80 02 77 00 Table 8 Mode sense data ST32550 default values ASA I SCSI 2 implementat...

Страница 75: ...00 01 00 08 00 10 40 00 00 00 CHG 03 83 16 FF FF FF FF 00 00 FF FF 00 00 00 00 00 00 00 00 00 00 00 00 00 00 DEF 04 84 16 00 0D B7 0B 00 00 00 00 00 00 00 00 00 00 00 00 00 00 1C 20 00 00 CHG 04 84 1...

Страница 76: ...Y Y Y Disconnect reconnect Y Y Y Asynchronous data transfer Y Y Y Synchronous data transfer Y Y Y Synchronized locked spindle operation Y Y Y Differential interface circuits available Y Y Y Segmented...

Страница 77: ...Interface Product Manual 11 5 1 Synchronous data transfer periods supported Table 12 lists the synchronous data transfer periods supported by the drives Table 12 Synchronous data transfer periods M Tr...

Страница 78: ...tput of a power supply must meet SELV safety extra low voltage as defined in IEC 950 Pins 1 12V DC 2 12V DC return 3 5V DC return 4 5V DC 11 7 SCSI physical interface Figures 26 27 and 28 illustrate t...

Страница 79: ...or DC Power Connector ST31250W and ST32550W J1 Connector ST31250WD and ST32550WD J1 Connector J5 Pin 1 Pin 1 Figure 27 ST31250W WD and ST32550W WD physical interface J2 J4 SCSI I O Connector SCA Pin 1...

Страница 80: ...2 Cable requirements Sections 11 7 1 2 1 11 7 1 2 2 and 11 7 1 2 3 describe the single ended differential and general cable requirements for Barracuda 2LP drives 11 7 1 2 1 Single ended I O circuits S...

Страница 81: ...discontinuitiesandsignalreflections cablesofdifferentimpedancesshould not be used in the same bus Your specific setup may require tradeoffs in shielding effectiveness cable length number of loads tran...

Страница 82: ...e SCSI termination ST31250ND ST31250WD ST32550NDandST32550WDdrivesusediffer entialinterfacesignals Eachofthesesignalsmustbeterminatedateachend of the total cable with 330 ohms to 5V and 330 ohms to gr...

Страница 83: ...een input and output signals is due to losses in the cable 2 ANSI SCSI compatible circuits 3 Total interface cable length should not exceed that specified in Section 11 7 1 2 1 4 Source of drive termi...

Страница 84: ...m to EIA RS 485 1983 Input characteristics Eachsignalreceivedbydifferentialinterfacedrivesshouldhavethefollowing input characteristics when measured at the disc drive s SCSI connector Input current on...

Страница 85: ...e Provide external active terminators when termination is required ST31250ND ST31250WD ST32550ND and ST32550WD drives Differential I O Barracuda drives do not have provisions to add terminator sockets...

Страница 86: ...p 3 051 1 30 16 4 06 100 2 54 025 64 Sq Contact 50 Places C L 040 1 02 Ref 335 010 8 50 001 002 Dia 083 2 1 Trifurcated Pin 4 places 26 6 60 Typ 065 1 65 x 45 Chamfer Typ 20 5 08 Typ 60 15 24 42 10 67...

Страница 87: ...B 7 16 MSG 42 DB P 18 SEL 44 GROUND 20 C D 46 GROUND 22 REQ 48 GROUND 24 I O 50 TERMPWR 26 Notes 1 All odd pins except pin 25 are connected to ground Pin 25 is left open Caution Do not connect pin 25...

Страница 88: ...2 DB 3 9 10 DB 3 DB 4 11 12 DB 4 DB 5 13 14 DB 5 DB 6 15 16 DB 6 DB 7 17 18 DB 7 DB P 19 20 DB P DIFFSENS 21 22 GROUND GROUND 23 24 GROUND TERMPWR 25 26 TERMPWR GROUND 27 28 GROUND ATN 29 30 ATN GROUN...

Страница 89: ...tion 1 Position 1 4 Position Power Header Commercial Mate N Lock 12 Position Auxiliary Shrouded Post Header AMPMODU 2mm 68 Position SCSI Receptacle AMPLIMITE 050 Series 403 10 24 033 84 Typ 010 25 Typ...

Страница 90: ...GROUND 15 49 GROUND GROUND 16 50 GROUND TERMPWR 17 51 TERMPWR TERMPWR 18 52 TERMPWR RESERVED 19 53 RESERVED GROUND 20 54 GROUND GROUND 21 55 ATN GROUND 22 56 GROUND GROUND 23 57 BSY GROUND 24 58 ACK...

Страница 91: ...9 DB P DIFFSENS 16 50 GROUND TERMPWR 17 51 TERMPWR TERMPWR 18 52 TERMPWR RESERVED 19 53 RESERVED ATN 20 54 ATN GROUND 21 55 GROUND BSY 22 56 BSY ACK 23 57 ACK RST 24 58 RST MSG 25 59 MSG SEL 26 60 SEL...

Страница 92: ...87 2 278 Y 0 15 M Y M 0 15 M Y M 0 0 15 000 006 62 15 2 447 0 15 005 Housing X X PCB Contacts 0 3 012 M Y M 1 27 05 Typ C L of Datum Y 0 50 020 Pin 1 Pin 1 Side View Front View Contacts are recessed a...

Страница 93: ...O 11 51 GROUND REQ 12 52 GROUND C D 13 53 GROUND SEL 14 54 GROUND MSG 15 55 GROUND RST 16 56 GROUND ACK 17 57 GROUND BSY 18 58 GROUND ATN 19 59 GROUND DB P0 20 60 GROUND DB 7 21 61 GROUND DB 6 22 62...

Страница 94: ...DB P0 DB 7 21 61 DB 7 DB 6 22 62 DB 6 DB 5 23 63 DB 5 DB 4 24 64 DB 4 DB 3 25 65 DB 3 DB 2 26 66 DB 2 DB 1 27 67 DB 1 DB 0 28 68 DB 0 DB P1 29 69 DB P1 DB 15 30 70 DB 15 DB 14 31 71 DB 14 DB 13 32 72...

Страница 95: ...SG to data media T16 4 5 11 Command dependent Data to status T17 4 5 15 Command dependent Status to command complete MSG T18 4 5 5 8 15 1 0 s Command complete MSG to bus free T19 4 5 5 8 15 0 75 s Dat...

Страница 96: ...0 09 s 0 04 s 4 5 8 14 15 MSG OUT byte transfer T33 4 5 2 0 04 s STATUS byte transfer T34 4 5 5 8 0 04 s 4 5 15 Synchronous data transfer characteristics Request signal transfer period 3 various 800 n...

Страница 97: ...control 15 caching write data 16 capacities formatted 8 unformatted 8 conducted noise immunity 34 connector parts DC power connection 68 contact assignments differential P cable 81 SCA 84 single ende...

Страница 98: ...nquiry data 62 installation 30 instructions 9 plug in and play 30 service tools 30 interface physical 56 requirements 59 interleave 7 minimum sector 14 internal data rate 11 J J1 jumper connector 48 J...

Страница 99: ...locking 18 skew operating the drive with 19 S safety agencies certification 3 safety regulatory agency compliance 3 SCA contact assignments for DC drives 84 contact assignments for WC drives 83 physi...

Страница 100: ...iption 55 synchronous data transfer periods supported 67 protocol 7 spindle 7 T temperature operating 36 terminating differential drivers receivers 72 SCSI devices 70 single ended drivers receivers 72...

Страница 101: ...Barracuda 2LP Product Manual Rev D 91...

Страница 102: ...92 Barracuda 2LP Product Manual Rev D Seagate Technology Inc 920 Disc Drive Scotts Valley California 95066 4544 USA Publication Number 83328930 Rev D Printed in USA...

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