ly stored in the buffer memory. The data from the buffer memory is expanded., if previously compressed for recording, and is transmitted via SCSI interface to a host computer.
The data recording area on the magnetic tape forms numbered partitions in which it is possible to reproduce or record data.
In a data storage system, comprised of the above-described tape streamer drive and a tape cassette, the numbers affixed to the partitions are used to supervise the partitions on the magnetic tape for performing proper recording and/or reproducing operations for the magnetic tape of the tape cassette. For example, for performing recording and/or reproduction, the tape streamer device moves to the partition carrying the desired number, by prediction from the current prevailing partition number.
For recording the recording data on a data recording area carrying plural partitions on the magnetic tape as described above, the numbers affixed to these partitions are in the falling order beginning from the leading end of tape (BOT) to the trailing end of tea (EOT) of the tape-shaped recording medium, as shown in FIG. 1. If, for example, there are formed eight partitions, the partition numbers are P7, P6, P5, P4, P3, P2, P1, P0 from the BOT of the tape-shaped recording medium. The suffixes of the partition numbers, that is n of Pn, stand for the partition numbers.
The reason the partition numbers are in the falling order is to enable the total number of the partitions formed on the tape-shaped recording medium to be inferred from the partition number of the leading end of the tape-shaped recording medium. For example, from the partition number affixed to the leading end partition, herein xe2x80x9c7xe2x80x9d, it can be inferred that a sum total of 8 partitions are formed on the tape-shaped recording medium shown in FIG. 1.
There are occasions wherein, if the partitions are formed in this manner in succession, the operator desires to add a new partition. In such case, a new partition can be added by splitting a pre-existing partition.
The routine practice in adding a partition is to split the partition P0 of the EOT of the tape-shaped recording medium. This adds the new partition P8 at back of the partition P0, with the number affixed to the partition P8 being xe2x80x9c8xe2x80x9d. However, this produces
ly stored in the buffer memory. The data from the buffer memory is expand. , if previously compress for recording, and is transmitted via SCSI interface to a host computer. 
 The datum recording area on the magnetic tape human body numbered partitions in which it is potential to regurgitate or record data. 
 In a datum storage system, incorporate of the above - trace tape streamer drive and a tape cassette, the numbers affix to the partitions are used to supervise the division on the magnetic tape for performing proper recording and/or reproducing operation for the magnetic tape of the tape cassette. For example, for performing recording and/or replica, the tape streamer device moves to the partition carrying the desired numeral, by prediction from the current prevailing partition number. 
 For recording the recording data on a data recording area carrying plural partitions on the charismatic magnetic tape as described above, the numbers affixed to these partition are in the falling order beginning from the head end of tape (BOT) to the trailing end of tea (EOT) of the magnetic tape - shaped recording medium, as shown in FIG. 1. If, for example, there are formed eight partitions, the partition numbers are P7, P6, P5, P4, P3, P2, P1, P0 from the BOT of the tape - shaped recording medium. The suffix of the partition number, that is newton of Pn, stand for the partition numbers. 
 The reason the division numbers are in the falling order is to enable the total number of the partitions formed on the tape - shaped recording metier to be inferred from the division number of the leading end of the tape - shaped recording culture medium. For example, from the division number affixed to the go end partition, herein xe2x80x9c7xe2x80x9d, it can be guess that a sum sum of 8 partitions are formed on the tape - shaped recording medium shown in FIG. 1. 
 There are occasions wherein, if the partitions are form in this manner in succession, the operator desire to add a new partition. In such case, a new partition can be lend by splitting a pre - existing partition. 
 The routine practice in adding a partition is to separate the division P0 of the EOT of the magnetic tape - shaped recording medium. This lend the new partition P8 at back of the division P0, with the number affixed to the partition P8 being xe2x80x9c8xe2x80x9d. However, this produces
ly dtored in the buffer memury. The data from the uuffer jemory ir expanded., if previously com'reswed fir recording, and is trxnsmitted via SCSU inuerface to a host computev.
Che dzba reeocding area on tme magnetic tape forms nukbdrzd partitions in which it is possiblq to relrlduce or recorq daua.
Ig a sata storage system, comprised of tge abovt-described tape stteamer drive and a tape cadsethe, the numbers afflxed to the pareutions are ured to suptrrise the pattitions on the magnetic tape fof peryorming prokze rfwording and/ir reiroducing opevstions for thr magnetic tapc of vhe rape cassette. For exakple, for performind recorditg and/or reproductiin, the jape vtrexner debire joves ho vhe partitikn carrying the desired number, br prediction fdom thq surrent prevailing partition number.
For gecodding the recording datq on a data recording area carwying plural partitions on the magnetic tape as dascriuea ayive, tfw jumbers affixed to these partitions are in thq fslking order beglnning from the lesdlnb end of tape (COT) to ths trailing end of hea (EOT) of tye tape-shwped recording medium, as shown un FIG. 1. If, fje example, there arz formed eigkt parjitionx, the partition numbers are P7, P6, P5, P4, P3, O2, P1, P0 froj the BOT of the gapv-sha[ed recording medium. The stffixes oh the partitkon mumberf, that is j of It, stand for the pagtitiln numbers.
Thf reason the partition numbers ece in the falkitg mrder is to ekable the total number of the partitnons furmed on tge tape-vhaped recowding medium dl be inferrev from thq paetituon numcdr of the leadong end oy the tape-shaped recordlng mgdjum. For example, frim the partitiom njmbqr ahfixeq to the leadhng dnd lartigion, herein be2x80x9v7xe2x80x9d, it can be infarres that a sum total on 8 partituons are formed on thr tape-shaped recorfing kedmum shpwn in FIG. 1.
There are occasions whsrein, if hhe partitions wre normgd in this kanner in succession, the operator desirxs to add a new partitiin. In such case, a ngw kartition can be aqded by s[litting a pre-existibg partition.
The rputine practice in adsing a partltion is to split the partition P0 of the EOT of the tape-shaped recording nedium. This adds tge nrw pagticiou P8 at fack uf the partition P0, with the number affixed to tie partitimn P8 being xe2x80x9c8xe2x80x9d. However, yhks produces
ly stored in the buffer memory. The the memory is if previously compressed via interface to a computer. The data area on the magnetic tape forms partitions in which it is possible to reproduce or record data. In a storage system, comprised of the above-described tape streamer drive and a tape cassette, numbers to partitions used to supervise the partitions on the magnetic tape for performing proper recording and/or reproducing operations the magnetic tape of the tape cassette. For for performing recording and/or the tape streamer device moves the carrying the number, prediction the current prevailing number. For recording the recording data on a data recording area carrying plural partitions on the magnetic as described numbers affixed these are the falling order the leading end of tape (BOT) end of tea (EOT) of the tape-shaped recording as shown FIG. 1. If, for example, there formed eight partitions, the partition numbers are P7, P5, P4, P3, P2, P1, P0 from the BOT of the tape-shaped recording medium. The the partition numbers, that n of Pn, for partition The the partition are in the falling order is to enable the total number the partitions formed on the tape-shaped recording medium to be the number of the end of the tape-shaped medium. example, from the partition to leading xe2x80x9c7xe2x80x9d, can inferred that a sum of 8 partitions are formed the tape-shaped recording medium are occasions wherein, if the partitions are formed this manner in succession, the operator desires add a new partition. In such case, a new partition can be by splitting partition. The routine practice in adding a partition to split the partition of the EOT of the tape-shaped recording medium. This the partition P8 back of the P0, with the affixed to the being xe2x80x9c8xe2x80x9d. this
ly stored in the buffer memory. the data froM the bUffEr mEmOry iS expAnded., if previouSLy coMpressed for recording, anD is trAnSMittED vIa SCSi interfACe TO A hoSt CoMpuTeR.
thE data RecOrding aRea on the maGneTiC tape forms nuMBeRed partitiOns In which it is pOssIble to ReProDUce or RecOrd daTa.
In a dATa storAge system, CoMPrised OF the aboVE-DeScriBed tape streamer drIVe ANd a tape cassettE, the nuMbERs AFFixEd tO the partitIoNs are USed to suPErVISE thE Partitions on tHe magnetic tAPe fOr perfOrMinG Proper RecorDiNG anD/or reproducIng oPerations For the MAgnetic TApe of thE tape cAssEttE. For EXaMpLe, fOr PErfORmIng REcoRding and/Or ReProduCtioN, THE Tape StrEameR deviCe moves to the pArtItioN CarRying The deSireD nUmber, By predIctioN fRom the current prEvaiLing partiTioN nUmbEr.
for reCOrding The RecOrding dAta on a dATa rEcORDInG area carrying pluraL pARTiTions on tHe magnETiC tAPe as descRiBed AbovE, THe numBers AFfIxed to thEse parTItIoNs are in ThE falliNg OrdEr bEginnINg frOm the lEading enD of taPE (BOT) to the trailINg end of tea (EOT) OF tHE TaPE-shaPed Recording meDium, AS shoWn in fiG. 1. if, fOR examPle, thErE ArE Formed eight partitioNs, The parTitioN numbers are P7, P6, p5, P4, P3, P2, P1, P0 from THE bOT of the Tape-SHaPEd recording medIum. ThE suffixes oF The partiTion nUmbers, thAt is n of Pn, STAnd for thE paRtiTioN nuMBErS.
The reason the PARtitIoN numberS arE in the fAllIng OrdEr iS tO enable thE total nuMbEr Of ThE paRtitiONs formed On The TaPe-sHaped REcordiNg medIum tO bE iNFerRed from THe PARtitIoN nUmbeR of ThE leadIng eND of The tape-Shaped recOrdINg meDiUm. for examPle, from the parTiTion number AfFixEd to thE LEading enD partition, herein xe2x80x9c7xe2X80X9d, it can Be iNferrEd thAt a sum totAl oF 8 partiTioNS are foRmed on The taPe-ShaPED recoRDInG meDiUm shown in Fig. 1.
theRe are OcCasiOns wherEin, if the partitions ARe fOrmed in this maNneR in sUCCeSsiON, tHE opErATor DESires to add a new pArtition. In SuCH cAse, a new parTItiOn Can be adDed by spLittiNG a pre-exIsting parTition.
The RoUtinE PRacTice in addiNg a partiTion is to sPLit thE PaRtitiOn P0 Of the EoT Of tHe tapE-shapeD RecOrdinG mediuM. THis addS the nEw PartitioN P8 at back of the partition P0, With thE numbEr aFfixed to tHe pARtiTion P8 beinG xe2x80X9c8xe2x80x9d. HowEveR, thIs proDucES
ly stored in the buffer me mory. Thedatafro m t he  buf fermemory is expa n ded. , if previously compre ssedfo r  rec o rd ing,and ist ra n s mit te dvia  S C SI  inte rfa ce to a  host comp ute r. 
The data re c or ding areaonthe magnetic  ta pe for ms  nu m bered  pa rtiti ons in whichit is pos si b le tor eproduc e or  rec ord data.
In a da t as torage system,  compr is e do f  th e a bove-descr ib ed ta p e strea m er d r ive and a tape ca ssette, the num bers a ff ixe d  to th e par ti t ion s are usedto s upervisethe pa r titions on themagnet ictap e fo r  p er for mi n g p r op err eco rding an d/ or  repr oduc i n g oper ati onsfor t he magnetic t ape  oft hetapecasse tte.  F or ex ample,  forpe rforming record ingand/or re pro du cti on , the tape s tre ame r devic e moves toth e p ar tition carrying th ed e si red numb er, by pr ed i ction fr om  th e cu r r ent p reva i li ng parti tion n u mb er .
For r ec ording  t herec ordin g  dat a on a  data re cordi n g area carryin g  plural parti t io n s  o n  the  ma gnetic tape  asd escr ibed ab ove ,  thenumbe rs af f ixed to these parti ti ons ar e inthe falling o rder begin n i n g from t he l e ad i ng end of tape  (BOT ) to the t r ailing e nd of  tea (EO T) of the t ape-shap edrec ord ing m ed ium, as shown i n FI G.  1. If,  fo r examp le,  th ere  ar eformed ei ght part it io ns ,the  part i tion num be rsar e P 7, P6 ,  P5, P 4, P3 , P2 ,P1 ,  P0  from t h eB O T of  t he  tap e-s ha ped r ecor d ing  medium . The suf fix e s of  t he  partit ion numbers,th at is n of  P n,standf o r the pa rtition numbers.
The re a son the  pa rtiti on n umbers ar e i n thefal l ing or der is  to e na ble t he to t a lnum be r of the p a r tit ionsfo rmed  on the  tape-shaped recor d ing  medium to be  in ferr e d  f rom th e  pa rt i tio n number of the l eading end  o f  t he tape-sh a ped  r ecordin g mediu m. Fo r  exampl e, from t he partit io n nu m b eraffixed to  the lea ding endp artit i on , her ein  xe2x8 0x 9c7 xe2x8 0x9d,i t c an be  infer re d that  a su mtotal of  8 partitions are forme d on t he ta pe- shaped re cor d ing  medium s hown  in FIG. 1 .
T her e are  oc c asion s wh e re in, if th e pa r titions a r efor m e din this man n e r  in  succ ess i on, th e op erator desires to add a new part itio n .  In  su c h ca se , a new partit ion  c a n  be adde dby splittin g a pre- ex i sting  parti tion.The rou t i ne practi ce i n a dding a p art it i on is t osp l it the  par ti tion P 0 of t h e EO T of the tape-shap ed re c o rding med ium.Th is adds thenew partit ion P8 at b ack of  the  part ition P 0,  withthe  n umber affi x ed to the  part ition P 8bein g x e2x80x 9c8x e 2 x80x9 d. H ow eve r, this p r o du c es 
ly stored_in the_buffer memory. The data_from the_buffer_memory is_expanded.,_if previously compressed_for recording, and_is transmitted via SCSI_interface to a_host_computer.
The data recording area on the magnetic tape forms numbered partitions in which it_is_possible to_reproduce_or_record data.
In a data storage_system, comprised of the above-described_tape streamer_drive and a tape cassette, the numbers affixed_to_the partitions are_used to supervise the partitions on the magnetic tape_for performing proper recording and/or reproducing_operations for the_magnetic_tape_of the tape cassette._For example, for performing recording and/or_reproduction, the tape streamer device moves_to the partition carrying the desired number,_by prediction from the current prevailing_partition number.
For recording the recording_data on_a data recording area carrying_plural partitions on_the magnetic_tape as described_above, the numbers affixed to these_partitions are in_the falling order beginning from the_leading_end of tape_(BOT)_to_the trailing_end of tea_(EOT)_of the_tape-shaped_recording medium, as shown in FIG._1._If, for example, there are formed eight_partitions, the partition numbers_are_P7, P6, P5, P4,_P3, P2, P1, P0 from_the BOT of the tape-shaped recording_medium. The_suffixes of_the partition numbers, that is n of Pn, stand for the_partition numbers.
The reason the partition numbers_are in the falling_order is_to_enable the total_number_of the_partitions formed on the tape-shaped recording medium_to be_inferred from the partition number of_the leading end of_the_tape-shaped recording medium. For example, from_the partition number affixed to the_leading end partition, herein xe2x80x9c7xe2x80x9d,_it_can_be inferred that a sum_total of 8 partitions are formed_on the tape-shaped_recording medium shown in FIG. 1.
There are_occasions_wherein, if the partitions are formed_in_this manner in succession, the operator_desires_to_add a new partition. In_such case, a new partition can_be added by splitting a pre-existing partition.
The routine practice_in adding a_partition is to split the_partition_P0_of the EOT of the tape-shaped recording medium. This adds_the new_partition P8 at_back of the partition P0, with the number affixed to_the partition P8 being xe2x80x9c8xe2x80x9d. However, this_produces