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## Internal hardware enhancements 

These drives feature the following significant hardware enhancements over the previous models: 

GLYPH<SM590000> Thirty-two channel-enhanced error correction code (ECC) recording format. 

GLYPH<SM590000> Enhanced JD-type media servo pattern. 

GLYPH<SM590000> Flangeless rollers, which are designed to minimize tape edge damage and debris buildup by the elimination of the roller flanges. 

GLYPH<SM590000> Tunnel Magneto Resistive (TMR head) on the TS1155 and on new version of the TS1150 whereas older generation of TS1150 use a Giant Magneto Resistive Heads (GMR head). These advanced heads are designed to reduce friction with advanced head coating to prevent corrosion and to extend head and tape cartridge life. 

GLYPH<SM590000> Skew Actuator, which allows dynamic skew adjustment of the head to keep the head perpendicular to the tape. 

The data-dependent, noise-predictive, maximum-likelihood (DD-NPML) detection scheme was developed at IBM Research, Zurich, to enable the accurate detection of data errors. 

## 2.3.3 Media 

The TS1155 and TS1150 drives use the following enhanced Barium Ferrite (BaFe) second-generation particle media types. The new media can be read/written up to 360 MBps native sustained data rate (up to 700 MBps at 3:1 compression ratio) in the new 32-channel Jag 5, 5E, 5A, and 5AE logical format, as listed in Table 2-11. 

<img src='content_image/980519.jpg'>

Important:  The TS1155 and TS1150 are not compatible with several older 3592 cartridge media types: JA, JB, JW, JJ, JR, and JX media types J3, J2, and J1. (MEDIA5, MEDIA6, MEDIA7, MEDIA8, MEDIA9, and MEDIA10). 

TS1155 is not supported on z/OS. 

These drives improve capacity and performance by writing and reading J5 and J5A logical format and by using a new 32-channel enhanced ECC recording format with a higher track density and higher linear density on the same media types. 

