Seagate Barracuda 18FC ST118273FC, Product Manual

Page 1: ... Barracuda 18FC Disc Drive ST118273FC Product Manual Volume 1 ...

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Page 3: ... Barracuda 18FC Disc Drive ST118273FC Product Manual Volume 1 ...

Page 4: ...logy Inc Barracuda SeaFAX SeaFONE SeaBOARD and SeaTDD are either trademarks or registered trademarks of Seagate Technology Inc or one of its subsidiaries All other trademarks or registered trademarks are the property of their respective owners No part of this publication may be reproduced in any form without written permission from Seagate Technology Inc Printed in the United States of America ...

Page 5: ...Revision status summary sheet Revision Date Writer Engineer Sheets Affected A 08 04 98 L Newman R Metzner 1 1 v thru viii 1 thru 64 B 11 24 98 L Newman R Metzner 52 ...

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Page 7: ...stics 10 4 3 Start stop time 10 4 4 Prefetch multi segmented cache control 10 4 5 Cache operation 11 4 5 1 Caching write data 11 5 0 Reliability specifications 13 5 1 Error rates 13 5 1 1 Environmental interference 13 5 1 2 Interface errors 13 5 1 3 Write errors 13 5 1 4 Seek errors 13 5 2 S M A R T 14 5 3 Reliability and service 15 5 3 1 Mean time between failure MTBF 15 5 3 2 Field failure rate ...

Page 8: ...el port login accept 35 9 1 6 Fibre Channel Process Login PRLI 35 9 1 7 Fibre Channel Process Accept ACC 35 9 1 8 Fibre Channel fabric login 36 9 1 9 Fibre Channel fabric accept login 37 9 1 10 Fibre Channel Arbitrated Loop options 38 9 2 Dual port support 38 9 3 SCSI commands supported 39 9 3 1 Inquiry data 42 9 3 2 Mode Sense data 42 9 4 Miscellaneous operating features and conditions 45 9 5 FC ...

Page 9: ... interface 27 Figure 6 LED indicator connector 28 Figure 7 Air flow 29 Figure 8 PCBA temperature measurement locations 30 Figure 9 HDA case temperature measurement location 30 Figure 10 Physical interface 46 Figure 11 Port bypass circuit physical interconnect 46 Figure 12 FC AL SCA device connector dimensions 47 Figure 13 J6 connector dimensions 47 Figure 14 FC AL transmitters and receivers 49 Fig...

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Page 11: ...s support the Fibre Channel Arbitrated Loop and SCSI Fibre Channel Protocol specifica tions to the extent described in this manual The Fibre Channel Interface Manual part number 77767496 describes the general Fibre Channel Arbitrated Loop characteristics of this and other Seagate Fibre Channel drives Figure 1 Barracuda 18FC family disc drive ...

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Page 13: ...packaged However it is the user s responsibility to assure that the drive meets the appropriate EMI requirements in their system Shielded I O cables may be required if the enclosure does not provide adequate shielding If the I O cables are external to the enclosure shielded cables should be used with the shields grounded to the enclosure and to the host con troller 2 1 1 1 Electromagnetic suscepti...

Page 14: ...97 FC PH 2 Fibre Channel Physical and Signaling Interface 2 X3 303 199X FC PH 3 Fibre Channel Physical and Signaling Interface 3 X3 272 1996 FC Arbitrated Loop FC AL X3 269 1996 Fibre Channel Protocol for SCSI FCP NCITS TR 19 Private Loop SCSI Direct Attach NCITS TR 20 Fabric Loop Attachment FC FLA SFF 8045 Specification for 40 pin SCA 2 Connector with Parallel Selection SFF 8067 Specification for...

Page 15: ...he Fibre Channel interface FC AL topology or the SCSI fibre channel protocol The head and disc assembly HDA is environmentally sealed at the factory Air recirculates within the HDA through a non replaceable filter to maintain a contamination free HDA environment See Figure 2 for an exploded view of the drive Never disassemble the HDA This exploded view is for informa tion only Do not attempt to se...

Page 16: ...ntive maintenance or adjustments required Dedicated head landing zone Automatic shipping lock Embedded Grey Code track address to eliminate seek errors Self diagnostics performed at power on 1 1 interleave Zone bit recording ZBR Vertical horizontal or top down mounting Dynamic spindle brake 1 024 Kbyte data buffer see Section 4 5 Embedded servo design Supports SCSI enclosure services via interface...

Page 17: ...ssories OEM standard drives are shipped with the Barracuda 18FC Installation Guide part number 77767525 3 7 Factory installed options You may order the following items which are incorporated at the manufacturing facility during production or packaged before shipping Single unit shipping pack The drive is normally shipped in bulk packaging to provide maximum protection against transit damage Units ...

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Page 19: ...on time for 512 byte sectors Including controller overhead1 2 msec 1 Execution time measured from receipt of the FCP command to the FCP response 2 Assumes no errors and no sector has been relocated Read Write Average Typical3 4 3 Typical access times are measured under nominal conditions of temperature voltage and horizontal orientation as measured on a representative sample of drives 4 Access tim...

Page 20: ...ature is enabled data in contiguous logical blocks on the disc immediately beyond that which was requested by a Read command are retrieved and stored in the buffer for immediate transfer from the buffer to the host on subsequent Read commands that request those logical blocks this is true even if cache opera tion is disabled To enable Prefetch use Mode Select page 08h byte 12 bit 5 Disable Read Ah...

Page 21: ...e prefetches additional logical blocks contiguous to those transferred in step 2 above and stores them in the segment The drive stops filling the segment when the maximum prefetch value has been transferred Case B read command is received and the first logical block address requested is not in any segment of the cache 1 The drive fetches the requested logical blocks from the disc and transfers the...

Page 22: ...equent read commands If a 10 byte CDB Write command 2Ah is issued with the data page out DPO bit set to 1 no write data is cached but the cache segments are still checked and cleared if need be for any logical blocks that are being written If the number of write data logical blocks exceeds the size of the segment being written into when the end of the segment is reached the data is written into th...

Page 23: ...he individual device error rates 5 1 3 Write errors Write errors can occur as a result of media defects environmental interference or equipment malfunction Therefore write errors are not predictable as a function of the number of bits passed If an unrecoverable write error occurs because of an equipment malfunction in the drive the error is classified as a failure affecting MTBF Unrecoverable writ...

Page 24: ... issue a Log Sense command to log page 0x3E This allows you to control when S M A R T interruptions 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 disc so 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 interface The p...

Page 25: ...erature measurements and other infor mation which you can use to enhance the service life of the drive 5 3 1 Mean time between failure MTBF The production disc drive achieves an MTBF of 1 000 000 hours when operated in an environment that ensures the case temperates specified in Section 8 4 1 are not exceeded Short term excursions up to the specification limits of the operating environment will no...

Page 26: ... 3 7 Product warranty Beginning on the date of shipment to the customer and continuing for a period of five years Seagate warrants that each product including components and subassemblies that fails to function properly under normal use due to defect in materials or workmanship or due to nonconformance to the applicable specifications will be repaired or replaced at Seagate s option and at no char...

Page 27: ...t device in the loop will continue to receive the output of the previous device to the newly inserted device If the bypass circuit is not present loop operation is temporarily disrupted until the next device starts receiving the output from the newly inserted device and regains synchronization to the new input The Pass through state is disabled while the drive performs self test of the FC interfac...

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Page 29: ...ommand 5 See paragraph 6 2 1 Conducted noise immunity Specified voltage tolerance includes ripple noise and transient response 6 Operating condition is defined as random seek reads of 64 blocks 7 All power saving features enabled 8 During idle the heads are relocated every 60 seconds to a random location within the band from track 0 to one fourth of maximum track This will result in a random varia...

Page 30: ...urrent profile T0 Power is applied to the drive T1 Controller self tests are performed T2 Spindle begins to accelerate under current limiting after performing internal diagnostics T3 Spindle is up to speed and the head and arm restraint is unlocked Note All times and currents are typical See Table 1 for maximum current requirements 6 3 Power dissipation Typical seek power dissipation is 23 3 watts...

Page 31: ... 2 Relative humidity The values below assume that no condensation on the drive occurs a Operating 5 to 90 relative humidity with a maximum gradient of 10 per hour b Non operating 5 to 95 relative humidity with a maximum gradient of 10 per hour 6 4 3 Effective altitude sea level reference a Operating 1 000 to 10 000 feet 305 to 3 048 meters b Non operating 1 000 to 40 000 feet 305 to 12 210 meters ...

Page 32: ...erate error free while subjected to continuous vibration not exceeding 5 350 Hz 0 5 G Vibration may be applied on the X Y or Z axis b Operating abnormal Equipment as installed for normal operation will not incur physical damage while subjected to periodic vibra tion not exceeding 15 minutes of duration at major resonant frequency 5 400 Hz 0 75 G Vibration occuring at these levels may degrade opera...

Page 33: ...46 05 mm Weight 2 1 lb 0 95 kilograms Figure 4 Mounting configuration dimensions 5 75 4 00 1 026 620 4 000 250 3 750 2 380 1 750 0 181 1 622 1 620 1215 1215 146 05 101 6 26 060 15 748 101 600 6 350 95 25 60 45 44 450 4 590 41 20 41 150 3 080 3 080 A B C D E F H J K L M N P R max ref max max 0 025 0 015 0 010 0 011 0 005 0 010 0 010 0 010 0 013 0 007 0 027 0 021 0 025 64 381 max ref 25 28 12 25 25 ...

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Page 35: ...s When an error occurs during drive operation the drive if programmed to do so performs error recovery proce dures to attempt to recover the data The error recovery procedures used depend on the options previously set in the Error Recovery Parameters mode page Error recovery and defect management may involve using sev eral SCSI commands described in the Fibre Channel Interface Manual The drive imp...

Page 36: ...nd with Check Condition status and an unrecoverable read error will be reported 7 3 FC AL system errors Information on the reporting of operational errors or faults across the interface is given in the Fibre Channel Interface Manual The FCP Response returns information to the host about numerous kinds of errors or faults The Receive Diagnostic Results reports the results of diagnostic operations p...

Page 37: ...ion If you set the AL_PA on the backpanel to a value of 0 the system issues a unique soft assigned physical address automatically Loop initialization is the process used to verify or obtain an address The loop initialization process is per formed when power is applied to the drive when a device is added or removed from the Fibre Channel loop or when a device times out attempting to win arbitration...

Page 38: ...een done with the drive in horizontal discs level and vertical drive on its side orientations which are the two pre ferred mounting orientations 8 4 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 6 4 1 Temperature Specific consider ation should be given to make su...

Page 39: ... the required cooling for the electronics and HDA is provided place the drive in its final mechan ical configuration perform random write read operations and after the temperatures stabilize measure the case temperature of the components listed below Component reference locations are shown in Figure 8 The typical ambient air temperature associated with the list is 25 C and the resulting MTBF is 1 ...

Page 40: ...e at the maximum case temperature is intended for short time periods only Continuous opera tion at the elevated temperatures will reduce product reliability Figure 8 PCBA temperature measurement locations Figure 9 HDA case temperature measurement location Component Reference MTBF 1 000 000 hours at 30 C ambient temperature C HDA Figure 9 45 Transceiver 1 56 Aurora 2 53 Servo DSP Bailey 3 48 Motor ...

Page 41: ...ers The out of plane distortion X is determined by defining a plane with three of the four mounting points fixed and evaluating the out of plane deflection of the fourth mounting point when a known force F is applied to the fourth point 8 6 Grounding Signal ground PCBA and HDA ground are connected together in the drive and cannot be separated by the user Maximizing the conductive contact area betw...

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Page 43: ...ponses Table 5 lists the FC SCSI FCP response codes returned for task management functions supported Table 3 Link services supported Type of frame Link service Basic link service frames Abort Sequence ABTS Basic link service reply frames Basic_Accept BA_ACC Basic_Reject BA_RJT Extended link service frames N_Port Login PLOGI Fabric Login FLOGI Logout LOGO Process Login PRLI Process Logout PRLO Read...

Page 44: ...g offset Must 1 Random relative offset Not checked Port Login Accept will return a 0 not supported Valid version level x N_Port F_Port Must 0 N_Port Alternate credit model Must 1 Other bits reserved xxx XX FS Receive buffer field size The FS field in the common and Class 3 parameters is checked for the range 129 FS 2 112 and a multiple of four bytes For multiple frame sequences all frames but the ...

Page 45: ...00 00 00 00 00 00 00 Class 1 48 51 00 00 00 00 52 63 00 00 00 00 00 00 00 00 00 00 00 00 Class 2 64 67 00 00 00 00 68 79 80 00 00 00 00 00 FS FS 00 FF 00 00 Class 3 80 83 00 01 00 00 84 95 00 00 00 00 00 00 00 00 00 00 00 00 Reserved 96 99 00 00 00 00 100 111 00 00 00 00 00 00 00 00 00 00 00 00 Vendor 112 115 00 00 00 00 Version FS Receive buffer field size The drive returns and uses the receive b...

Page 46: ...0 00 00 00 Class 1 48 51 00 00 00 00 52 63 00 00 00 00 00 00 00 00 00 00 00 00 Class 2 64 67 00 00 00 00 68 79 80 00 00 00 00 00 08 40 00 00 00 00 Class 3 80 83 00 00 00 00 84 95 00 00 00 00 00 00 00 00 00 00 00 00 Reserved 96 99 00 00 00 00 100 111 00 00 00 00 00 00 00 00 00 00 00 00 Vendor 112 115 00 00 00 00 Version UI Unique identifier This 24 bit field is uniquely assigned to the drive This s...

Page 47: ...ot checked The FC AL drive uses BB Credit of zero 0 CF Common features This binary field selects the common features requested by the fabric login MSB Continuously increasing offset x Random relative offset x Valid version level x N_Port F_Port Must 1 F_Port Alternate credit model Must 1 Other bits reserved xxx XX FS Receive buffer field size The FS field in the common and Class 3 parameters is ch...

Page 48: ... soft address to prevent an address conflict Note When an ST118273FC drive is connected in loops with previous Seagate FC drive products Barracuda 4LP FC ST32171FC ST34371FC and ST34571FC Barracuda 9FC ST19171FC Cheetah 4LP FC ST34501FC Cheetah 9FC ST19101FC the connection of Port A and B for these products must follow the requirements in their product manu als Subject to buffer availability Barra...

Page 49: ...ating def page Y Firmware numbers page Y Date code page Y Jumper settings page 15h Y Mode select same pages as Mode Sense command shown below 3 16h Y Reserve N 3rd party reserved N Extent reservation 17h Y Release 18h N Copy 19h Y Fibre Channel Control page 1Ah Y Mode sense Y Unit attention page 00h Y Error recovery page 01h Y Disconnect reconnect control page 02h Y Format page 03h Y Rigid disc dr...

Page 50: ...ck N Relative address 30h N Search data high 31h N Search data equal 32h N Search data low 33h N Set limits 34h N Prefetch 35h Y Synchronize cache 36h N Lock unlock cache 37h Y Read defect data 39h N Compare 3Ah N Copy and verify 3Bh Y Write buffer Y Write combined header and data mode 0 Y Write data mode 2 N Download microcode mode 4 Y Download microcode and save modes 5 N Download microcode with...

Page 51: ...e definition 41h Y Write same N PBdata N LBdata 42 4Bh N Not used 4Ch Y Log Select 4Dh Y Log Sense 4E 4Fh N Not used 50h N XD write 51h N XP write 52h N XD read 53 54h N Not used 55h Y Mode Select 10 3 56h Y Reserved 10 Y 3rd party reserve N Extent reservation 57h Y Released 10 58 59h N Not used 5Ah Y Mode Sense 10 3 5B 5Dh N Not used 5Eh Y Persistent Reserve In 5Fh Y Persistent Reserve Out 60 7Fh...

Page 52: ... list that are not changeable by the Mode Select command get their values from default values storage When power is applied to the drive it takes saved values from the media and stores them as current values 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 so res...

Page 53: ... In byte 02 hex value FF equates to the binary pattern 11111111 If there is a zero in any bit position in the field it means that bit is not changeable Since all of the bits in byte 02 are ones all of these bits are changeable The changeable values list can only be changed by downloading new firmware into the flash E PROM Note Because there are often several different versions of drive control fir...

Page 54: ...0 00 00 00 00 00 00 00 00 00 00 00 00 00 DEF 84 16 00 1D 4D 14 00 00 00 00 00 00 00 00 00 00 00 00 00 00 1C 09 00 00 CHG 84 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 DEF 87 0A 00 0C E8 00 00 00 00 00 FF FF CHG 87 0A 0F FF 00 00 00 00 00 00 FF FF DEF 88 12 10 00 FF FF 00 00 FF FF FF FF 80 03 00 00 00 00 00 00 CHG 88 12 B5 00 00 00 FF FF FF FF 00 00 A0 FF 00 00 00 00 00 00...

Page 55: ...notification N Synchronized locked spindle operation Y Segmented caching N Zero latency read Y Queue tagging up to 128 queue tags supported Y Deferred error handling Y Parameter rounding controlled by Round bit in Mode Select page 0 Y Reporting actual retry count in Extended Sense bytes 15 16 and 17 N Adaptive caching Y SMP 1 in Mode Select command needed to save RPL and rotational offset bytes Ta...

Page 56: ...cted in a loop together or with other compatible FC AL devices A maxi mum of 127 devices may have addresses however one of the addresses is reserved for a fabric port switch device This means 126 addresses are available for FC AL devices More FC AL compatible devices may physically reside on the loop but they will not be functional because they would not be able to obtain valid addresses Port bypa...

Page 57: ...hode 40 512 220 91 101N With polarization Molex 40 717431040 With polarization 1 618 003 in 41 1 0 08 mm 0 197 003 in 5 00 08 mm 2 places 1 28 in 32 47 mm 64 in 16 24 mm Pin 40 Pin 20 Pin 21 Pin 1 1 618 003 in 41 10 0 08 mm 1 492 009 in 37 90 0 24 mm 6 71 0 18 mm 0 25 mm 0 264 007 in 010 in typ 05 in 1 27 mm min 0 226 in 6 50 mm min 0 024 in 0 60 mm min 0 039 in 0 75 mm 2 places 0 051 006 in 1 30 ...

Page 58: ...mmon ground Pin Signal name Signal type Pin Signal name Signal type 1 EN bypass port A TTL output 21 12 Volts charge 2 12 Volts 22 Ground 3 12 Volts 23 Ground 4 12 Volts 24 Port A_in Diff PECL input pair 5 Parallel ESI 25 Port A_in 6 Ground 1 26 Ground 7 Active LED out Open collector out 27 Port B_in Diff PECL input pair 8 Reserved 28 Port B_in 9 Start_1 TTL input 29 Ground 10 Start_2 TTL input 30...

Page 59: ...re shorter to allow capacitive pre charging through the longer 12 volt charge pin Two of the 5 volt pins are shorter to allow capacitive precharging through the longer 5 volt charge pin 9 5 7 Fault LED Out The Fault LED Out signal is driven by the drive when the drive detects failure of both ports the drive detects an internal failure the drive receives the appropriate fault LED command from the h...

Page 60: ...ysical addresses AL_PA You can think of the SEL lines as the equivalent of a backpanel logic plug The drives does not provide pull up resis tors on these lines The backpanel is required to provide high and low inputs to the SEL_ID lines per the spec ifications in Table 22 on page 52 Note Table 21 gives AL_PA values for each SEL value The first entry in the table is SEL_ID 00 The last entry is SEL_...

Page 61: ...E 14 7C 39 57 34 64 100 CE 0F 15 7A 3A 58 33 65 101 CD 10 16 79 3B 59 32 66 102 CC 11 17 76 3C 60 31 67 103 CB 12 18 75 3D 61 2E 68 104 CA 13 19 74 3E 62 2D 69 105 C9 14 20 73 3F 63 2C 6A 106 C7 15 21 72 40 64 2B 6B 107 C6 16 22 71 41 65 2A 6C 108 C5 17 23 6E 42 66 29 6D 109 C3 18 24 6D 43 67 27 6E 110 BC 19 25 6C 44 68 26 6F 111 BA 1A 26 6B 45 69 25 70 112 B9 1B 27 6A 46 70 23 71 113 B6 1C 28 69 ...

Page 62: ...gnal without rise and fall time degradation You must AC couple the receiver to isolate potentially different DC characteristics of the outputs and the receiver Table 22 TTL characteristics State Voltage Current Input high 1 9 VIH 5 5V 0 IIH 500nA max Input low 0 5V VIL 0 9V 0 IIL 500nA max Output high EN Bypass A B 2 4 VOH 5 25V IOH 3mA Output low EN Bypass A B VOL 0 5V IOL 3mA Output high Paralle...

Page 63: ...tics are provided in Table 25 Figure 16 provides the data valid eye diagram for typical and minimum requirements to recover data at the specified interface error rate The inputs are AC coupled on the drive Figure 16 Receive eye diagram Table 25 Differential PECL input characteristics Description Parameter Notes Serial input voltage swing 200 Vin 1 300 mV AC coupled 941 ps Vout mv 800 ps 941 ps 659...

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Page 65: ...roubleshooting tips and specifications for disc drives and tape drives This service is available 24 hours daily and requires a touch tone phone International callers can reach this service by dialing 1 405 936 1234 SeaFAX is Seagate s automated FAX delivery system Using a touch tone phone you can obtain technical support information by return FAX This service is available 24 hours daily Technical ...

Page 66: ...ch 1 905 812 8099 or 1 800 624 9857 FAX 1 905 812 7807 European Support Services For European customer support dial the toll free number for your specific country for presales support techni cal support SeaFAX and warranty repair If your country is not listed here dial our European call center at 31 20 316 7222 from 8 30 A M to 5 00 P M European central time Monday through Friday The European call...

Page 67: ...The Netherlands Asia Pacific Support Services If the customer service number for your country is not listed here dial our Asia Pacific headquarters located in Singapore during business hours from 9 00 A M to 5 00 P M Singapore time Technical Support Australia 61 2 9725 3366 FAX 61 2 9725 4052 Hong Kong 852 2368 9918 FAX 852 2368 7173 Japan FAX 81 3 5462 2979 Singapore 65 488 7584 FAX 65 488 7528 T...

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Page 69: ...B backpanel 48 backplane 50 basic link service frames 33 Basic_Accept BA_ACC 33 Basic_Reject BA_RJT 33 BB 34 37 BB Credit 34 37 buffer data 6 space 11 Bullet 30 busy status 45 bypass circuit 17 Byte check command 40 bytes per surface 9 bytes per track 9 C cache operation 11 cache segments 11 Caching parameters page 08h command 39 caching write data 11 Canadian Department of Communications 3 capaci...

Page 70: ...interference EMI 13 elevated temperatures 30 EMI 13 EMI requirements 3 enable bypass port A 50 port B 50 signal 50 state 17 Enclosure services page command 39 environmental interference 13 limits 21 requirements 13 error detection mechanisms FC 17 management 25 rates 13 error correction code 96 bit Reed Solomon 6 Error recovery page 01h command 39 extended link service frames 33 reply frames 33 Ex...

Page 71: ...nd 39 jumpers 27 L latency average rotational 9 10 LBdata 41 LED driver signals 52 Link Service Reject LS_RJT 33 link services supported 33 Lock unlock cache command 40 Log select command 41 Log sense command 41 logic power 49 logical block address 11 logical block reallocation scheme 6 logical block size 6 10 logical segments 11 Logout LOGO 33 loop 46 50 51 disruption 17 initialization 27 loop po...

Page 72: ...linder switch 10 P P_LOGI received on Port A 35 received on Port B 35 parameter rounding 45 pass through state 17 PBC 46 50 PBdata 41 peak operating current 19 peak to peak measurements 20 PECL input 53 performance characteristics detailed 9 general 10 performance highlights 6 physical interface 46 description 46 physical specifications 19 PI 35 36 pin descriptions 48 PN 34 37 port bypass circuit ...

Page 73: ...mmand 39 rotation speed 9 running disparity 17 S safety 3 SCA part numbers 47 SCSI interface commands supported 39 SCSI Interface Product Manual 3 Search data equal command 40 high command 40 low command 40 Seek command 39 seek error defined 13 rate 13 Seek extended command 40 seek performance characteristics 9 seek positioning error 15h 13 seek time average typical 9 full stroke typical 9 single ...

Page 74: ...it eye diagram 53 transmitters 49 transporting the drive 16 troubleshooting 55 TTL characteristics 52 U UI 35 36 unique identifier 35 36 Unit attention page 00h command 39 Unit serial number page command 39 unrecoverable error 13 write error defined 13 unrecovered media data 13 V Valid version level 34 37 Verify command 40 Verify error recovery page 07h command 39 vibration limits 21 non operating...

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Page 76: ...Seagate Technology Inc 920 Disc Drive Scotts Valley California 95066 4544 USA Publication Number 77767524 Rev B Printed in USA ...