The present invention relates to a data storage cartridge, and more particularly, to a data storage cartridge capable of sensing events and generating a performance record.
Data storage cartridges have been used for decades in the computer, audio, and video fields. The data storage cartridge continues to be a popular device for recording large volumes of information for subsequent retrieval and use.
A data storage cartridge generally consists of an outer shell or housing maintaining a data storage medium. In this regard, the data storage medium can include magnetic data storage tape, magnetic discs, optical tapes, and optical discs. One common example of a data storage cartridge includes a housing maintaining at least one tape reel assembly and a length of magnetic storage tape. The storage tape is wrapped about a hub portion of the tape reel assembly and is driven through a defined path by a tape drive system. The housing normally includes a separate cover and a separate base. Together, the cover and the base form an opening (or window) at a forward portion. Access to the storage tape by a read/write head is initiated via insertion of the data storage tape cartridge into a tape drive. The interaction between the storage tape and head occurs within the housing for a mid-tape load design. Conversely, the interaction between the storage tape and head occurs exterior the housing for a helical drive design. Where the tape cartridge/drive system is designed to direct the storage tape away from the housing, the data storage tape cartridge normally includes a single tape reel assembly employing a leader block design. Alternately, where the tape cartridge/drive system is designed to provide head/storage tape interaction within the housing, a dual tape reel configuration is typically employed.
Regardless of the number of tape reel assemblies associated with a particular data storage tape cartridge, each cartridge includes at least one strand of magnetic storage tape. In this regard, the magnetic storage tape includes a base substrate (typically a polymeric film, for example polyethylene naphthalate) coated on at least one side with a magnetic dispersion. The magnetic dispersion, when dry, is sensitive to magnetic fields and is configured to magnetically record information. With this in mind, the magnetic storage tape, in addition to being receptive to magnetically written data, can also be magnetically interfered with. For example, strong magnetic fields can destroy, or write over, magnetic information stored on the storage tape. Moreover, abusive handling of the data storage tape cartridge can damage portions of the cartridge or the magnetic coating on the storage tape. To this end, data stored on the storage tape can be lost (i.e., made irretrievable) when the cartridge or the storage tape is damaged.
In some cases the damage to the storage tape and/or cartridge is not apparent to the user. In particular, data is said to be inadvertently lost when the magnetic storage tape becomes damaged without the knowledge of the end-user or consumer. For example, a consumer could record data onto the storage tape and unknowingly place the cartridge in a strong magnetic field, for example, next to a magnet. In this scenario, it is possible that the data stored on the storage tape could be erased by the strong magnetic field such that the consumer would be oblivious to the fact that the data had been lost. At a later time, when the consumer attempts to retrieve the once stored data, s/he will discover that the data is damaged or unretrievable.
In addition, data storage tape cartridges can also be damaged during transportation, storage, and through end-user abuse. For example, the storage tape (and its data storing capacity) can be damaged through exposure to high temperatures, sudden shock due to dropping, and cartridge tampering. In this regard, what is initially a high quality data storage tape cartridge meeting all industry standards later becomes damaged or destroyed due to improper transportation, storage or handling. With this in mind, the user has an interest in establishing that the data storage tape cartridge is functional and ready for future data storage uses.
In other instances, the manufacturer produces and delivers a data storage tape cartridge meeting all industry standards, and the cartridge later becomes damaged or destroyed through abuse or neglect of the cartridge by the end-user. For example, tampering with the housing components, dropping the cartridge, opening the cartridge housing to expose the data storage tape, etc., can all damage the information storage capacity of the storage tape. To this end, manufacturers desire to establish that the data storage tape cartridge was manufactured in compliance with industry standards and delivered to the consumer in a serviceable condition.
With the above discussion in mind, manufacturers and consumers have an expectation that data storage cartridges will be useful and operable in storing data. Manufacturers desire verification of the life cycle history of the data storage cartridge. Likewise, consumers desire assurance that the data storage cartridge meets industry standards, and once written to, is operable such that the data is retrievable. Therefore, a need exists for manufacturers and consumers to compile and access a record of the data storage cartridge performance and use history.
One aspect of the present invention is related to a data storage cartridge. The data storage cartridge includes a housing, a data storage medium, a memory module, and at least one sensor. The housing defines first and second housing sections that are reciprocally mated to form an enclosed region. The data storage medium is disposed within the enclosed region. The memory module is disposed within the enclosed region, and the sensor(s) is/are disposed within the enclosed region and electrically coupled to the memory module. In this regard, sensor(s) is/are configured to sense a cartridge event and the memory module communicates with the sensor(s) to record the sensed cartridge event.
Another aspect of the present invention is related to a system for generating a performance record for a data storage device. The system includes a data storage cartridge and a reader. The data storage cartridge includes a housing, a data storage medium, a memory module, and at least one sensor. In this regard, the housing defines first and second housing sections, the housing sections reciprocally mated to form an enclosed region. The data storage medium and the memory module are disposed within the enclosed region. The sensor(s) is/are disposed within the enclosed region and is/are electrically coupled to the memory module to sense a cartridge event. To this end, the memory module is configured to store the sensed cartridge event in the performance record, and further wherein the reader communicates with the memory module to read the performance record.
Yet another aspect of the present invention is related to a method of generating a performance record for a data storage device. The method includes providing a data storage cartridge. In this regard, the data storage cartridge includes a housing, a data storage medium, a memory module, and at least one sensor. The housing defines first and second housing sections, the housing sections reciprocally mated to form an enclosed region. The data storage medium and the memory module are disposed within the enclosed region. The sensor(s) is/are disposed within the enclosed region and is/are electrically coupled to the memory module. The method additionally includes sensing a cartridge event with the at least one sensor, and storing the sensed cartridge event in the memory module as data in the performance record. The method ultimately includes reading the performance record data with a reader located exterior to the data storage tape cartridge.
Embodiments of the invention are better understood with reference to the following drawings. The elements of the drawings are not necessarily to scale relative to each other. Like reference numerals designate corresponding similar parts.
The utility and advantages of the various embodiments of the present invention can be implemented in data storage cartridges generally. In this regard, the general data storage cartridge includes a housing defining an enclosed region, a data storage medium and a memory module disposed within the enclosed region, and at least one sensor disposed within the enclosed region and electrically coupled to the memory module. Specific examples of useful data storage cartridges, data storage media, and memory modules are described below. The specific examples illustrate only some of the useful embodiments of the present invention, as will be readily apparent to any person skilled in the art of data storage cartridges. The following examples are, therefore, illustrative only and are not intended to delimit the scope of the invention.
With the above discussion in mind, an exemplary data storage cartridge according to one embodiment of the present invention is illustrated in the form of a single reel data storage tape cartridge and shown at 20 in
The housing 22 is sized for insertion into a typical tape drive (not shown). Thus, the housing 22 exhibits a size of approximately 125 mm×110 mm×21 mm, although other dimensions are equally acceptable. With this in mind, the housing 22 defines a first housing section 40 and a second housing section 42. In one embodiment, the first housing section 40 forms a cover, and the second housing section 42 forms a base. It is understood that directional terminology such as “cover,” “base,” “upper,” “lower,” “top,” “bottom,” etc., is employed throughout the Specification to illustrate various examples, and is in no way limiting.
The first and second housing sections 40 and 42, respectively, are sized to be reciprocally mated to one another to form an enclosed region 44 and are generally rectangular, except for one corner 46 that is preferably angled to form a tape access window 48. The tape access window 48 forms an opening for the storage tape 28 to exit the housing 22 when the leader block 36 is removed from the tape access window 48 and threaded to a tape drive system (not shown) for read/write operations. Conversely, when the leader block 36 is stored in the tape access window 48, the tape access window 48 is covered.
In addition to forming a portion of the tape access window 48, the second housing section 42 also forms a central opening 50. The central opening 50 facilitates access to the tape reel assembly 26 by a drive chuck of the tape drive (neither shown). During use, the drive chuck enters the central opening 50 to disengage the brake assembly 24 prior to rotating the tape reel assembly 26 for access to the storage tape 28. The brake assembly 24 is of a type known in the art and generally includes a brake body 52 and a spring 54 co-axially disposed within the tape reel assembly 26. When the data storage tape cartridge 20 is idle, the brake assembly 24 is engaged with a brake interface 56 to selectively “lock” the tape reel assembly 26 to the housing 22.
The tape reel assembly 26 includes a hub 60, an upper flange 62, and a lower flange 64. The hub 60 defines a tape-winding surface (not visible in
The storage tape 28 is preferably a magnetic tape of a type commonly known in the art. For example, the storage tape 28 can be a balanced polyethylene naphthalate (PEN) based substrate coated on one side with a layer of magnetic material dispersed within a suitable binder system, and coated on the other side with a conductive material dispersed within a suitable binder system. Acceptable magnetic tape is available, for example, from Imation Corp., of Oakdale, Minn.
The leader block 36 covers the tape access window 48 during storage of the cartridge 20 and facilitates retrieval of the storage tape 28 for read/write operations. In general terms, the leader block 36 is shaped to conform to the window 48 of the housing 22 and to cooperate with the tape drive (not shown) by providing a grasping surface for the tape drive to manipulate in delivering the storage tape 28 to the read/write head. In this regard, the leader block 36 can be replaced by other components, such as a dumb-bell shaped pin. Moreover, the leader block 36, or a similar component, can be eliminated entirely, as is the case with dual reel cartridge designs.
As a point of reference, the tape reel assembly 26 and the storage tape 28 have been described above as one form of data storage media. However, it is to be understood that other forms of data storage media are equally acceptable. For example, the data storage media can include magnetic discs, optical tapes, optical discs, and any non-volatile data storage device configured to be disposed within the enclosed region 44.
The one or more sensors 32 can assume a wide variety of forms and perform a wide variety of functions. In one embodiment, the sensors 32 include a door sensor 70 for sensing removal of the leader block 36 (
The electrical connectors 78 extend from the memory module 30 to a respective one of the sensors 70, 72, 74, and 76. In one embodiment, the electrical connector 78 is a metal wire. In an alternate embodiment, the electrical connector 78 is printed, conductive ink extending continuously between the memory module 30 and a respective one of the sensors 70, 72, 74, and 76.
The memory chip 92 electronically records and stores data (i.e., sensed cartridge events) generated by the sensors 70, 72, 74, and 76 (
The antenna 94, in one embodiment, is disposed about a perimeter of the memory module 30 and is shown as coiled in triplicate in
In contrast with the known data storage cartridges, the data storage tape cartridge 20 and the system 100 of the present invention includes at least one sensor, for example sensors 70, 72, 74, and 76, for sensing cartridge events that are stored in a performance record, and the module 30 configured to communicate the performance record data to the reader 102. In a preferred embodiment, the memory chip 92 date/time stamps each sensed cartridge event, thus enabling the user 104 to access the performance record and determine whether the cartridge 20 has been tampered with and/or subjected to conditions likely to cause damage, and the antenna 94 communicates the performance record to a location exterior the cartridge 20, preferably to the handheld RF reader 102.
An exemplary process of generating a performance record for a data storage device is described with reference to
The past performance and use of the data storage tape cartridge 20, in the form of data compiled in the performance record, is stored in the memory module 30 by the memory chip 92. In a preferred embodiment, the memory chip 92 electronically records and date/time stamps the cartridge events, thus compiling a record that can be reviewed for evidence of tampering with, and/or abuse to, the cartridge 20. The user 104 through the use of a reader 102 can selectively read the performance record without opening the housing 22.
The reader 102 can be employed to query past use and read the performance record of the data storage tape cartridge 20. In addition, the reader 102 also recharges the power source 33 during the query/read step. In particular, in one embodiment the reader 102 can be placed adjacent to the cartridge 20 by the user 104 for reception of a RF signal communicated from the antenna 94. For example, the sensor 74 is a temperature sensor that senses a local temperature of the cartridge 20. The memory chip 92 records the sensed cartridge event of temperature, for example the temperature of the cartridge 20 over the previous year. In addition, the memory chip 92 records and date/time stamps when the cartridge 20 temperature drops below a selected value, and also, when the cartridge 20 temperature rises above the same selected value. These temperature data are stored in the memory chip 92 of the memory module 30, and when date/time stamped, form a chronological performance record of temperature data for the cartridge 20. In a similar manner, the memory module 30 records and compiles data over a period of time for one or more sensors 32 (
In another exemplary query, the data storage tape cartridge 20 is stored between uses, and access to the stored cartridge 20 is restricted. As a point of reference, the data storage tape cartridge 20 is suited for so-called “top-secret” uses, where confidential commercial data or restricted governmental data is stored on the storage tape 28. In this exemplary query, the user 104 has an interest in monitoring past access to the storage tape 28 in determining if restricted access to the data stored on the storage tape 28 has been breached. To this end, the reader 102 is employed to query the memory module 30 for past access to the storage tape 28. Recall, the tape rotation sensor 72 has been described as being configured to sense movement of the storage tape 28, as would occur during any read/write process. Consequently, when the reader 102 queries the memory module 30 for sensed cartridge events related to the tape rotation sensor 72, the reader 102 is essentially monitoring rotation and movement of the tape reel assembly 26 and/or prior access to the storage tape 28. In this manner, the user 104 employing the reader 102 can monitor the date and time of any prior cartridge 20 activities by reviewing the performance record which will indicate any prior access to the storage tape 28 (and therefore, access to information on the storage tape 28). If the user 104 determines after reviewing the performance record that the storage tape 28 has been accessed without authorization, the user 104 is alerted to the possibility that the data stored on the storage tape 28 could be tainted, or that a breach in security has occurred. Therefore, the performance record serves as a safety and security check relative to storage tape 28 accesses.
Although specific embodiments of a data storage cartridge having sensors, and a memory module for generating a performance record have been illustrated and described in this written description, it will be appreciated by those of ordinary skill in the art that a variety of alternate and/or equivalent implementations may be substituted for the specific embodiments shown and described without departing from the scope of the present invention. With this in mind, this application is intended to cover any adaptations or variations of data storage cartridges having a memory module and at least one sensor. Therefore, it is intended that this invention be limited only by the claims and their equivalents.