====== nice things to know ======
===== LTO Speedmatching =====
LTO drive speed matching native data rates (MB/s  / GB/h) 
^ Generation 9 *) ^  Generation 8 ^  Generation 7 ^  Generation 6 ^  Generation 5 ^
|  408 / 1468  |  360 / 1296  |  306.00 / 1101.60  |  160.00 / 576.00  |  140.00 / 504.00  |
|  385 / 1386  |  341 / 1228  |  287.52 / 1035.07  |  150.77 / 542.77  |  130.00 / 468.00  |
|  366 / 1318  |  318 / 1145  |  268.56 / 966.82  |  141.54 / 509.54  |  120.00 / 432.00  |
|  347 / 1249  |  306 / 1103  |  250.66 / 902.38  |  132.31 / 476.32  |  112.70 / 405.72  |
|  325 / 1170  |  273 / 983  |  231.86 / 834.70  |  123.08 / 443.09  |  105.50 / 379.80  |
|  305 / 1098  |  249 / 896  |  213.06 / 767.02  |  113.85 / 409.86  |  98.20 / 353.52  |
|  //284 / 1022//  |  226 / 814  |  194.26 / 699.34  |  104.62 / 376.63  |  90.90 / 327.24  |
|  //263 / 947//  |  203 / 731  |  175.46 / 631.66  |  95.38 / 343.37  |  83.60 / 300.96  |
|  //244 / 878//  |  180 / 648  |  157.67 / 567.61  |  86.15 / 310.14  |  76.40 / 275.04  |
|  //223 / 803//  |  157 / 567  |  138.52 / 498.67  |  76.92 / 276.91  |  69.10 / 248.76  |
|  //203 / 731//  |  135 / 486  |  120.11 / 432.40  |  67.69 / 243.68  |  61.80 / 222.48  |
|  //177 / 637//  |  112 / 403  |  101.46 / 365.26  |  58.46 / 210.46  |  53.5 / 192.60  |
| | | |  49.23 / 177.23  |  46.30 / 166.68  |
| | | |  40.00 / 144.00  |  40.00 / 144.00  |

Sources:\\ [[https://www.redbooks.ibm.com/redbooks/pdfs/sg245946.pdf| LTO-7]]
[[https://www-01.ibm.com/common/ssi/ShowDoc.wss?docURL=/common/ssi/rep_ca/8/897/ENUS117-078/index.html&request_locale=en| LTO-8]]
[[https://www.ibm.com/common/ssi/cgi-bin/ssialias?appname=skmwww&htmlfid=897%2FENUS121-069&infotype=AN&subtype=CA&mhsrc=ibmsearch_a&mhq=lto-9|LTO9]]
[[https://www.redbooks.ibm.com/redbooks/pdfs/sg248235.pdf| IBM TS4500 R7 Tape Library Guide]]
[[https://www.redbooks.ibm.com/redbooks/pdfs/sg245946.pdf| IBM Tape Library Guide for 
Open Systems]]

*) Speedsteps below 305 mb/s for full hight drives only

===== "real" LTO capacity measures =====
The values given are derived from a given number of tapes marked as //full// inside TSM

^ Generation ^ LTO 9 ^  LTO 8 ^ LTO 7 ^  LTO 6 ^ LTO 5 ^
|  Minimum  |  ---  |  10.91  |  2.44  |  1.17  |  0.97  |
|  Maximum  |  ---  |  38.55  |  47.05  |  10.73  |  5.18  |
|  Average  |  ---  |  14.73  |  7.19  |  2.93  |  1.71  |
|  Median  |  ---  |  13.85  |  6.43  |  2.83  |  1.60 |
| | | | | |
|  native  |  18.00  |  12.00  |  6.00  |  2.50  |  1.50  |
|  native compressed  |  45.00  |  30.00 |  15.00  |  6.25  |  3.00  |
| | | | | |
|  //Number of Tapes//  |  //---//  |  263  |  1404  |  4051  |  659  |

=====  Enterprise Tape (Jaguar) Speedmatching =====
Jaguar drive speed matching data rates (MB/s) depend on the media and the generation style used (see [1] -- [4])
^  media / Generation  ^  Jaguar 6 (12 speed steps)  ^  Jaguar 5 (12 speed steps)  ^  Jaguar 4 (13 speed steps)  ^  Capacity (native)  ^
| JE media @ Generation 6  |  //up to 400MBps (1600 MBps)//  |  --  |  --  |  20 TB  |
| JD media @ Generation 6  |  //up to 400MBps (800 MBps)//  |  --  |  --  |  15 TB  |
| JD media @ Generation 5.5  |  --  |  //up to 360MBps//  |  --  |  15 TB  |
| JD media @ Generation 5  |  --  |  112 -- 365 MBps  |  --  |  10 TB  |
| JC media @ Generation 5  |  --  |  99 -- 303 MBps  |  --  |  7 TB  |
| JC media @ Generation 4  |  --  |  90 -- 252 MBps  |  76 -- 251 MBps  |  4 TB  |
| JB media @ Generation 4  |  --  |  --  |  74 -- 203 MBps  |  1.6 TB  |
| JB media @ Generation 3  |  --  |  --  |  41 -- 163 MBps  |  1 TB  |

  * [1] https://www.ibm.com/us-en/marketplace/ts1140/specifications
  * [2] https://www.ibm.com/us-en/marketplace/ts1150/specifications
  * [3] https://www.ibm.com/us-en/marketplace/ts1155/specifications
  * [4] https://www.ibm.com/us-en/marketplace/ts1160/specifications / https://www-01.ibm.com/common/ssi/cgi-bin/ssialias?infotype=an&subtype=ca&appname=gpateam&supplier=899&letternum=ENUSLG18-0135