E025 ± Logical unit not ready, manual intervention required.

E026 ± Logical unit not ready, format in progress.

E027 ± Logical unit not ready, operation in progress.

E028 ± Logical unit does not respond to selection.

E029 ± Multiple peripheral devices selected.

E030 ± Logical unit communication failure.

E031 ± Logical unit communication time-out.

E032 ± Logical unit communication parity error.

E033 ± Logical unit communication CRC error (Ultra-DMA/32).

E034 ± Track following error.

E035 ± Head select fault.

E036 ± Error log over¯ow.

E040 ± Write error.

E041 ± Compression check miscompare error.

E042 ± Data expansion occurred during compression.

E043 ± Block not compressible.

E044 ± Unrecovered read error.

E045 ± Read retries exhausted.

E046 ± Error too long to correct.

E047 ± Multiple read errors.

E048 ± Incomplete block read.

E049 ± No gap found.

E050 ± Miscorrected error.

E051 ± Decompression CRC error.

E052 ± Cannot decompress using declared algorithm.

E053 ± Block sequence error.

E054 ± Random positioning error.

E055 ± Mechanical positioning error.

E056 ± Positioning error detected by read of medium.

E057 ± Defect list error.

E058 ± Parameter list length error.

E059 ± Synchronous data transfer error.

E060 ± Invalid command operation code.

E061 ± Logical block address out of range.

E062 ± Invalid element address.

E063 ± Invalid ®eld in CDB.

E064 ± Logical unit not supported.

E065 ± Invalid ®eld in parameter list.

E066 ± Parameter not supported.

E067 ± Parameter value invalid.

E068 ± Threshold parameters not supported.

E069 ± Invalid release of active persistent reservation.

E070 ± Write protected.

E071 ± Hardware write protected.

E072 ± Logical unit software write protected.

E073 ± Associated write protect.

E074 ± Persistent write protect.

E075 ± Permanent write protect.

E076 ± Not ready to ready change, medium may have changed.

E077 ± Import or export element accessed.

E078 ± Power on, reset, or bus device reset occurred. E079 ± Power on occurred.

E080 ± SCSI bus reset occurred.

E081 ± Bus device reset function occurred.

E082 ± Device internal reset.

E083 ± Parameters changed.

E084 ± Mode parameters changed.

E085 ± Log parameters changed.

E086 ± Reservations preempted.

E087 ± Copy cannot execute because Store Controller cannot disconnect.

E088 ± Command sequence error.

E089 ± Overwrite error on update in place.

E090 ± Commands cleared by another initiator.

E091 ± Incompatible medium installed.

E092 ± Cannot read medium - unknown format.

E093 ± Cannot read medium - incompatible format.

E094 ± Cleaning cartridge installed.

E095 ± Cannot write medium - unknown format.

E096 ± Cannot write medium - incompatible format.

E097 ± Cannot format medium - incompatible medium.

E098 ± Cleaning failure.

E099 ± Medium format corrupted.

E100 ± Tape length error.

E101 ± Enclosure failure.

E102 ± Enclosure services failure.

E103 ± Unsupported enclosure function.

E104 ± Enclosure services unavailable.

E105 ± Enclosure services transfer failure.

E106 ± Enclosure services transfer refused.

E107 ± Rounded parameter.

E108 ± Saving parameters not supported.

E109 ± Sequential positioning error.

E110 ± Tape position error at beginning-of-medium. E111 ± Tape position error at end-of-medium.

E112 ± Reposition error.

E113 ± Position past beginning of medium.

E114 ± Medium destination element full.

E115 ± Medium source element empty.

E116 ± Medium magazine not accessible.

Chapter 3. Using the Tape Drive 15

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IBM 4690 manual Using the Tape Drive

4690 specifications

The IBM 4690 is a renowned point-of-sale (POS) system that has been pivotal in the retail and hospitality industries since its introduction in the late 1980s. Notably associated with IBM’s family of retail hardware and software solutions, the 4690 has transformed the modern retail environment, providing a robust platform for transaction processing and inventory management.

One of the main features of the IBM 4690 system is its powerful software architecture. Designed to efficiently handle high transaction volumes, it integrates seamlessly with various peripheral devices such as barcode scanners, receipt printers, and payment terminals. The system's user-friendly interface allows staff to process sales quickly and efficiently, enhancing the overall customer experience.

In terms of technology, the IBM 4690 operates on a proprietary operating system that supports a variety of programming languages, allowing retailers to customize applications to meet their specific needs. This flexibility not only streamlines operations but also enables retailers to implement specialized services such as loyalty programs and promotions. The hardware is designed for durability and reliability, essential in high-traffic retail environments.

Another significant characteristic of the IBM 4690 is its robust reporting capabilities. The system provides comprehensive sales reports, inventory analyses, and customer insights, all of which are essential for strategic decision-making. This analytical power helps businesses identify trends, forecast demand, and optimize stock levels, ultimately leading to improved profitability.

Furthermore, the IBM 4690 is known for its strong security features. By utilizing advanced encryption technologies and compliance with industry standards, the system helps protect sensitive customer data and payment information, ensuring a safe transaction environment.

The longevity and adaptability of the IBM 4690 system underscore its value in the retail sector. Even with newer technologies emerging, many businesses continue to rely on the robust functionality and proven performance of the 4690. With ongoing support and upgrades, the system remains a reliable choice for retailers looking to enhance their operational efficiency while delivering excellent customer service.

In summary, the IBM 4690 stands out due to its feature-rich software, durable hardware, robust reporting and analytics, and stringent security measures. These characteristics make it an indispensable tool for retailers aiming to thrive in an ever-evolving marketplace.