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Contents

vi

Quantum LTO-9 HH SAS User’s Guide

Function Code L: Load/Unload Test. . . . . . . . . . . . . . . . . . . . . 64

Function Code P: Post Error Reporting Enabled  . . . . . . . . . . . 65

Function Code U: Post Error Reporting Disabled . . . . . . . . . . . 66

Chapter 5

Media

67

Data Cartridge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Cartridge Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Capacity Scaling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

WORM (Write Once, Read Many) Cartridge . . . . . . . . . . . . . . . . . . . . . 72

Worm Media. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Data Security on WORM Media. . . . . . . . . . . . . . . . . . . . . . . . 73

WORM Media Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Requirements for WORM Capability . . . . . . . . . . . . . . . . . . . . 73

Cleaning Cartridge  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Cartridge Memory Chip (LTO-CM). . . . . . . . . . . . . . . . . . . . . . 74

Bar Code Labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

Write-Protect Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Handling Cartridges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Provide Training . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Ensure Proper Packaging. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Provide Proper Acclimation and Environmental Conditions  . . 78

Perform a Thorough Inspection  . . . . . . . . . . . . . . . . . . . . . . . 79

Handle the Cartridge Carefully . . . . . . . . . . . . . . . . . . . . . . . . 80

Examples of Cartridge Problems . . . . . . . . . . . . . . . . . . . . . . . 80

Environmental and Shipping Specifications for Tape Cartridges . . . . . 80
Disposing of Tape Cartridges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Chapter 6

Troubleshooting

83

Procedure 1: Determining Firmware Level and Capturing Drive Dump 83
Procedure 2: Inspecting a Cartridge for Damage. . . . . . . . . . . . . . . . . 84
Procedure 3: Checking SAS Host Connections . . . . . . . . . . . . . . . . . . . 85
Resolving Problems Reported by the Server. . . . . . . . . . . . . . . . . . . . . 86

Fixing SAS Bus Errors  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Resolving Media-Related Problems  . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Содержание LTO-9 HH SAS

Страница 1: ...User s Guide LTO 9 HH SAS 6 68132 04 Rev A...

Страница 2: ...violation of the law TRADEMARK STATEMENT Artico Be Certain and the Q brackets design DLT DXi DXi Accent DXi V1000 DXi V2000 DXi V4000 DXiV Series FlexTier Lattus the Q logo the Q Quantum logo Q Cloud...

Страница 3: ...g the Safety Inspection Procedure 3 Tape drive AC grounding inspection 4 Class I Laser Product 5 Rack Safety 5 Power Cords 8 Product Recycling and Disposal 8 Battery Return Policy 9 End of Life EOL Pl...

Страница 4: ...ported Device Drivers 20 Ethernet Port 20 IBM Spectrum Archive 21 Specifications 21 Physical specifications 21 Power specifications 22 Other specifications 22 Environmental specifications 22 Chapter 3...

Страница 5: ...ions 46 Entering Maintenance Mode 49 Exiting Maintenance Mode 50 Function Code 0 Maintenance Mode 50 Function Code 1 Run Drive Diagnostics 51 Function Code 2 Update Drive Firmware from FUP Tape 52 Fun...

Страница 6: ...Code Labels 74 Write Protect Switch 76 Handling Cartridges 77 Provide Training 77 Ensure Proper Packaging 78 Provide Proper Acclimation and Environmental Conditions 78 Perform a Thorough Inspection 79...

Страница 7: ...Contents Quantum LTO 9 HH SAS User s Guide vii Pre Call Checklist 87 Appendix A Error Codes and Messages 89...

Страница 8: ...Contents viii Quantum LTO 9 HH SAS User s Guide...

Страница 9: ...f the Single character Display It gives instruction on inserting and removing a tape cartridge describes methods of updating drive firmware and explains how to clean the tape drive It also lists diagn...

Страница 10: ...rdous to people A lightning bolt symbol always accompanies a danger notice to represent a dangerous electrical condition A sample danger notice follows WARNING An electrical outlet that is not correct...

Страница 11: ...on battery To avoid possible explosion do not burn Exchange only with the Quantum approved part Recycle or discard the battery as instructed by local regulations Caution The system contains circuit ca...

Страница 12: ...for proper fit It should be in place and secure 9 Check the product label on the tape drive to make sure that it matches the voltage at your outlet Tape drive AC grounding inspection 1 Power off the...

Страница 13: ...r all rack mounted devices DANGER Always lower the leveling pads on the rack cabinet Always install stabilizer brackets on the rack cabinet To avoid hazardous conditions due to uneven mechanical loadi...

Страница 14: ...ing labels located on the equipment in the rack to determine the total power requirement of the supply circuit For sliding drawers Do not pull out or install any drawer or feature if the rack stabiliz...

Страница 15: ...x 2032 mm 30 x 80 in Ensure that all devices shelves drawers doors and cables are secure Ensure that the four leveling pads are raised to their highest position Ensure that there is no stabilizer bra...

Страница 16: ...ertified cord set consisting of a minimum 18 AWG Type SVT or SJT three conductor cord a maximum of 15 feet in length and a tandem blade grounding type attachment plug rated 15 amperes 250 volts For un...

Страница 17: ...r specific battery information The battery must be recycled or disposed of properly Recycling facilities may not be available in your area For information on disposal of batteries contact your local w...

Страница 18: ...oing notice is provided in accordance with California Code of Regulations Title 22 Division 4 5 Chapter 33 Best Management Practices for Perchlorate Materials This product part may include a lithium m...

Страница 19: ...y data storage device that is designed to back up and restore open systems applications It is the ninth generation in the Ultrium series of products and is available with a Serial Attached SCSI interf...

Страница 20: ...artridges Maximum native data transfer rate of up to 300 MB per second Burst data transfer rate of 1200 MB per second Dual port 12 Gbps Serial Attached Small Computer Systems Interface SAS Half height...

Страница 21: ...tum LTO 9 HH SAS User s Guide 13 Front Panel of the Drive Figure 3 Front panel element descriptions 1 Cartridge unload button 2 Ready light green 3 Encryption light white 4 Fault light amber 5 Single...

Страница 22: ...tor for drive status and service only Drive Performance If you run applications that are highly dependent on tape processing speed take advantage of the significant performance improvements provided b...

Страница 23: ...s compatible with the cartridges of its predecessors the Quantum Ultrium Tape Drive Generation 8 The drive performs the following functions Reads and writes Ultrium 9 cartridges to Ultrium 9 format in...

Страница 24: ...rmed on first load of L9 LZ media during initialization Recommendation is to perform first load in the location of deployment which should be in a stable environment that meets the recommended environ...

Страница 25: ...ative data rates are as follows in the table below Table 2 Performance Parameters If the server s net compressed data rate is between two of the preceding native data rates the drive calculates the ap...

Страница 26: ...m access As an example a customer could capacity scale a data cartridge to 20 of its normal length which improves the average access time by almost a factor of 5 however it also reduces the native cap...

Страница 27: ...by the host application No checking is done if the firmware level is loaded by way of the host interface or the library interface SAS Interface The drive has a dual port 12 Gbps SAS Serial Attached SC...

Страница 28: ...vice drivers for the drive on the Internet You can access this material at the web site http www quantum com serviceandsupport Note If you do not have Internet access and you need information about de...

Страница 29: ...folder tree structure Using the host operating system s graphical file manager reading data on a LTO tape cartridge is as easy as dragging and dropping Users can run any application designed for disk...

Страница 30: ...40 Vac Line frequency 50 to 60 Hz auto ranging Line current at 100 Vac 0 48 A Line current at 240 Vac 0 20 A Specification Measurement Maximum altitude for operating and storage 3048 m 10 000 ft Maxim...

Страница 31: ...e on page 24 Verify the Shipment on page 25 Inspect the Power Cord and Outlet on page 25 Position the Tape Drive on page 26 Install the SAS Host Adapter Card if required on page 26 Connect the SAS Int...

Страница 32: ...protective packaging and install it directly into an enclosure without setting it down When this is not possible place the drive s packaging on a smooth level surface and place the drive on the packag...

Страница 33: ...02 SAS cables are not part of the ship group They must be ordered separately Inspect the Power Cord and Outlet 1 Inspect the power cord plug to ensure that it matches the power receptacle 2 Ensure th...

Страница 34: ...s Off the floor In a horizontal position Where the tape cartridge can be easily inserted The unit should not be stacked Do not place anything on top of the unit Install the SAS Host Adapter Card if re...

Страница 35: ...SAS host adapter and for the tape drive 3 The tape drive has two SAS ports and can be connected to two servers if desired Refer to the appropriate figure that represents your configuration for cabling...

Страница 36: ...er cord has already been installed turn power to the tape drive ON Connect Power 1 If the power cord has already been installed skip to step 3 2 Plug the power cord into the rear panel then plug the o...

Страница 37: ...stall Device Drivers A device driver is firmware that enables the tape drive to interact with a variety of servers See Supported Device Drivers on page 20 for instructions on downloading the latest de...

Страница 38: ...ge visit http www quantum com serviceandsupport To update the firmware refer to the following sections Updating Firmware through the Host Interface Use IBM Tape Diagnostic Tool ITDT to update your dri...

Страница 39: ...riefly displays 8 then becomes blank not lit when the firmware download and update is complete and there are no errors An error code will be displayed if a firmware download or update error has been d...

Страница 40: ...Chapter 3 Installation Updating firmware 32 Quantum LTO 9 HH SAS User s Guide...

Страница 41: ...oad Button Encryption status light Operating modes The drive functions in the following modes Operation mode functions include reading and writing data cartridge manipulation error reporting and firmw...

Страница 42: ...is powered on but idle the Ready light is solid green when it is performing a function the Ready light is flashing green Single character Display SCD The SCD presents a single character code for Erro...

Страница 43: ...e drive firmware Note If the drive dump is stored in RAM memory SCD Dot on solid the dump will be lost when you turn OFF the power or reset the drive Status Lights The status lights are light emitting...

Страница 44: ...Single character Display SCD If green Ready Status Light is and amber Fault Status Light is and Encryption Status Light is and SCD is and SCDDot is Meaning Off Off Off Off Off The drive has no power...

Страница 45: ...or Codes and Messages On Off On Off On Off Displaying random segments Blank displaying random segments displaying 8 Blank On Off During power on or a drive reset the drive front panel will display dri...

Страница 46: ...pendix A Error Codes and Messages to determine the action that is required Off Flashing Off Displaying C Off The drive needs cleaning Off Flashing Off Displaying Function Code 2 or Flashing Off The dr...

Страница 47: ...te is complete The drive indicates that the update is complete by resetting and performing POST If green Ready Status Light is and amber Fault Status Light is and Encryption Status Light is and SCD is...

Страница 48: ...button once per second to increment the display character until 0 displays Then press and hold the Unload button for three seconds Maintenance mode is exited when the Ready light is On and the SCD bec...

Страница 49: ...osition and you want to reinsert it remove the cartridge then insert it again If the cartridge is already loaded and you cycle the power turn it off then on the tape will reload Reset the drive Press...

Страница 50: ...aintenance Mode until the drive requests it Removing a Tape Cartridge To remove a tape cartridge 1 Ensure that the drive is powered on 2 Press the Unload button The drive rewinds the tape and partiall...

Страница 51: ...tape to rewind but if a problem occurs during recovery it can take up to an hour Always give the drive time to recover following a power cycle with a tape in the drive The Ready light flashes and the...

Страница 52: ...finish before removing the cartridge Note The drive will automatically eject an expired cleaning cartridge The Quantum LTO Ultrium Cleaning Cartridge is valid for 50 uses Cleaning the Tape Drive Clean...

Страница 53: ...maintenance functions Function Code Diagnostic or Maintenance Function Instructions Location 0 Exit Maintenance Mode Causes the drive to become available for reading and writing data Function Code 0 M...

Страница 54: ...tridge memory on the tape This turns the cartridge into a valid customer supplied scratch data cartridge Function Code 8 Unmake FUP Tape on page 55 9 Display Error Code Log Displays the last 10 error...

Страница 55: ...H Test Head Performs tests to ensure that the tape drive s head and tape carriage mechanics are working correctly Function Code H Test Head on page 60 J Fast Read Write Test Performs tests to ensure...

Страница 56: ...1 Press the Unload button once per second to increment the display character until 0 displays Press and hold the Unload button for 3 or more seconds then release the button to take the drive out of m...

Страница 57: ...d exit maintenance mode Caution For this test insert only a scratch blank data cartridge or a cartridge that may be overwritten During the test the drive overwrites the data on the cartridge Note If y...

Страница 58: ...from a LTO 9 tape drive with the same host interface e g SAS Fibre Channel 1 Place the drive in Maintenance Mode For instructions see Entering Maintenance Mode on page 47 2 Press the Unload button on...

Страница 59: ...oads the cartridge and exits Maintenance Mode after the cartridge is removed 1 Place the drive in Maintenance Mode For instructions see Appendix 4 Entering Maintenance Mode 2 Press the Unload button o...

Страница 60: ...the tape drive is in normal operating mode Simply press and hold the Unload button for ten seconds This causes the drive to reboot Function Code 5 Copy Drive Dump Function Code 5 copies data from a dr...

Страница 61: ...Maintenance Mode If you selected 5 1 the SCD will change to a flashing C indicating that a data cartridge is to be inserted 7 Insert a scratch blank data cartridge within 60 seconds or the drive will...

Страница 62: ...l perform option 6 1 4 Continue to press the Unload button once per second to cycle through the following functions 6 1 test the primary SAS port 6 2 test the secondary SAS port 6 3 test both primary...

Страница 63: ...ce Mode on page 47 3 Press the Unload button once per second until 7 appears in the Single character Display SCD If you cycle past 7 continue to press the Unload button until it displays again 4 To se...

Страница 64: ...cartridge or the media has read only compatibility error code P appears in the SCD In either case the tape drive unloads the cartridge and exits Maintenance Mode after the cartridge is removed If the...

Страница 65: ...er second until A appears in the SCD If you cycle past the desired code press the Unload button once per second until the code reappears 3 Press and hold the Unload button for three or more seconds th...

Страница 66: ...the code reappears 3 Press and hold the Unload button for three or more seconds then release it to select the function The SCD changes to a flashing C requesting a cartridge 4 Ensure that the write pr...

Страница 67: ...its Maintenance Mode after the cartridge is removed 1 Place the drive in Maintenance Mode For instructions see Entering Maintenance Mode on page 47 2 Press the Unload button once per second until F ap...

Страница 68: ...t the test at the end of the current test loop Pressing the Unload button twice will abort the test immediately Wait for the drive to rewind the tape and unload the cartridge Caution For this test ins...

Страница 69: ...nd write to tape Once you begin this test the diagnostic begins the loop sequence Time the first loop by pressing the Unload button once to stop the diagnostic after the completion of the first loop t...

Страница 70: ...to a flashing J and the tape drive runs the tests If no error is detected the diagnostic will loop and begin again To stop the loop press the Unload button for one second and release When the diagnost...

Страница 71: ...ease it to select the function The SCD changes to a flashing C 4 Insert a scratch blank data cartridge The SCD changes to a flashing L and the tape drive runs the tests If no error is detected the dia...

Страница 72: ...is disabled deferred check conditions are not reported to the host and temporary errors are not reported in the sense data This is the normal default setting for the drive When the drive has Post Erro...

Страница 73: ...RM Write Once Read Many Cartridge Cleaning cartridge To ensure that your Quantum Ultrium Tape Drive conforms to Quantum s specifications for reliability use only Quantum LTO Ultrium tape cartridges Yo...

Страница 74: ...ter 5 Media 66 Quantum LTO 9 HH SAS User s Guide Figure 8 The Quantum LTO Ultrium Data Cartridge 1 LTO cartridge memory 2 Cartridge door 3 Leader Pin 4 Write protect Switch 5 Label area 6 Insertion gu...

Страница 75: ...tracks for the return pass This process continues until all tracks are written and the cartridge is full or until all data is written The cartridge door 2 in Figure 8 on page 66 protects the tape fro...

Страница 76: ...Figure 8 on page 66 is a large notched area that prevents the cartridge from being inserted incorrectly Table 6 Cartridge Compatibility Table 7 Ultrium cartridge compatibility with Ultrium tape drives...

Страница 77: ...ia are incompatible with the WORM feature a specially formatted WORM tape cartridge see Figure 9 on page 69 is required Each WORM cartridge has a unique worldwide cartridge identifier WWCID which comp...

Страница 78: ...pability to your Quantum LTO Ultrium 9 drive s you need to use Quantum Ultrium 9 18 TB WORM tape cartridges Quantum Ultrium 8 12 TB WORM tape cartridges Cleaning Cartridge A specially labeled Quantum...

Страница 79: ...mand is issued enables the drive to quickly locate the recording area and begin recording The LTO CM also aids in determining the reliability of the cartridge by storing data about its age how many ti...

Страница 80: ...label on the LTO Ultrium 8 Tape Cartridge Guidelines for Using Bar Code Labels Apply the following guidelines whenever using bar code labels Use only Quantum approved bar code labels Do not reuse a la...

Страница 81: ...ability of the drive to load the cartridge Write Protect Switch The position of the write protect switch on the tape cartridge see 1 in Figure 11 on page 74 determines whether you can write to the ta...

Страница 82: ...s of the drive and the cartridge Before inserting a tape cartridge inspect the cartridge case cartridge door and write protect switch for breaks Incorrect handling or an incorrect environment can dama...

Страница 83: ...place it in a box or package If you ship the cartridge in a cardboard box or a box of a sturdy material ensure the following Place the cartridge in polyethylene plastic wrap or bags to protect it from...

Страница 84: ...t open any other part of the cartridge case The upper and lower parts of the case are held together with screws separating them destroys the usefulness of the cartridge Inspect the cartridge for damag...

Страница 85: ...idge Handling the tape can damage the tape s surface or edges which may interfere with read or write reliability Pulling on tape that is outside the cartridge can damage the tape and the brake mechani...

Страница 86: ...es When you ship a cartridge place it in its jewel case or in a sealed moisture proof bag to protect it from moisture contaminants and physical damage Ship the cartridge in a shipping container that h...

Страница 87: ...nt 26 C 79 F Web Bulb Temperature 1 Recommended The recommended operational storage environmental envelope provides guidance on the environmental range for optimal performance and high reliability Thi...

Страница 88: ...egausser use a minimum of 4000 oersted peak field over the entire space that the cartridge occupies The tape must make two passes through the field at 90 degree orientation change for each pass to ach...

Страница 89: ...responsible for updating Firmware For optimum performance the customer must obtain the latest level of firmware for the unit by downloading the firmware from the web site http www quantum com servicea...

Страница 90: ...the pin s placement 2 Inspect the cartridge case the cartridge door and the write protect switch for damage 3 Inspect the rear of the cartridge the part that you load first into the tape load compart...

Страница 91: ...ot eject properly contact your service representative Procedure 3 Checking SAS Host Connections Check the host connections for your drive by following the steps below If your server is not communicati...

Страница 92: ...includes Test Cartridge Media diagnostic that verifies whether a suspect cartridge and its magnetic tape are acceptable for use Statistical Analysis and Reporting System SARS to assist in isolating f...

Страница 93: ...are securely tightened 2 Verify that the drive s firmware is at the most recent level To determine the latest release of firmware visit the web See Updating firmware on page 30 for instructions on dow...

Страница 94: ...drive can read from and write to tape Function Code H Test Head on page 60 to ensure that the tape drive s head and tape carriage mechanics work correctly Function Code J Fast Read Write Test on page...

Страница 95: ...rred with a cartridge in the drive push the Unload button to eject the cartridge To clear the SCD error code and power cycle the drive press the Unload button for ten seconds A drive dump will be crea...

Страница 96: ...ove any blockage that prevents air from flowing freely through the tape drive Ensure that the operating temperature and airflow is within the specified range see Specifications on page 21 Clear the er...

Страница 97: ...ct a drive dump from one of the following Note Do not force a new dump one already exists Server s host interface by using a device driver utility or system tool for instructions about reading a drive...

Страница 98: ...defective cartridge and discard it If the operation fails and another tape drive is available insert the cartridge into the other unit and retry the operation If the operation fails discard the defec...

Страница 99: ...If the diagnostic succeeds the error was temporary If another tape drive is not available insert a scratch data cartridge into the unit and run Function Code 1 Run Drive Diagnostics on page 49 If the...

Страница 100: ...de Function Code 8 Unmake FUP Tape Drive will not Unmake FUP Tape Maintenance Code 8 with a cartridge that is not an FUP tape If the tape cartridge is the correct media type try another tape cartridge...

Страница 101: ...uring the test The test will fail if the correct interface wrap tool is not attached 2 If the correct interface wrap tool was attached during the test replace the drive The error code clears when you...

Страница 102: ...loop by pressing the Unload button once to stop the diagnostic after the completion of the first loop then record the time it takes for the test to complete Compare the recorded time with the Approxim...

Страница 103: ...her Data Cartridges only Retry the encryption operation with the tape cartridge in another encryption enabled drive Replace the media if the problem repeats with the same tape cartridge in multiple dr...

Страница 104: ...Appendix A Error Codes and Messages 96 Quantum LTO 9 HH SAS User s Guide...

Страница 105: ...compression as compared to the quantity of data that can be stored without compression In 2 5 1 compression two and a half times as much data can be stored with compression as can be stored without c...

Страница 106: ...ng of a specific device to perform a function asynchronous Pertaining to two or more processes that do not depend upon the occurrence of specific events such as common timing signals attention notice...

Страница 107: ...ansmit at a given moment byte A string consisting of a certain number of bits usually 8 that are treated as a unit and represent a character A fundamental data unit C capacity The amount of data that...

Страница 108: ...t connection A connection between a channel path and a drive caused when a unit check occurs during an I O operation controller A device that provides the interface between a system and one or more ta...

Страница 109: ...y that can receive and send data device driver A file that contains the code needed to use an attached device DIAG Diagnostic section of maintenance information manual differential See High Voltage Di...

Страница 110: ...ocode in response to a detected subsystem error FC Feature code FCC Federal communications commission FE Field engineer customer engineer or service representative field replaceable unit FRU An assemb...

Страница 111: ...conversion speed matching encoding first level error recovery and interfaces to one or more tape drives FP File protect frayed Damaged as if by an abrasive substance FRU Field replaceable unit FSC Fau...

Страница 112: ...re characters used to identify or name data element and possibly to indicate certain properties of that data element 3 A sequence of bits or characters that identifies a program device or system to an...

Страница 113: ...high capacity The Ultrium format is the preferred format when capacity rather than fast access is the key storage consideration An Ultrium cartridge has a compressed data capacity of up to 800 GB 2 1...

Страница 114: ...e millionth of microcode 1 One or more micro instructions 2 A code representing the instructions of an instruction set implemented in a part of storage that is not program addressable 3 To design writ...

Страница 115: ...system The oersted is the magnetic field strength in the interior of an elongated uniformly wound solenoid that is excited with a linear current density in its winding of one abampere per 4 centimeter...

Страница 116: ...ome page PROM Programmable read only memory R rack A unit that houses the components of a storage subsystem such as the library rackmount kit A packaged collection of articles used to install the rack...

Страница 117: ...in which at least one of the system signals represents mechanical motion Small Computer Systems Interface SCSI A standard used by computer manufacturers for attaching peripheral devices such as tape...

Страница 118: ...ating independently of or asynchronously with a controlling system sync Synchronous synchronize Occurring with a regular or predictable time relationship T tachometer tach A device that emits pulses t...

Страница 119: ...d conveniently as a unit VPD Vital product data The information contained within the tape drive that requires nonvolatile storage used by functional areas of the drive and information required for man...

Страница 120: ...Glossary 112 Quantum LTO 9 HH SAS User s Guide...

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