Cassette memory, magnetic tape cassette and recording and reproducing system
阅读说明:本技术 盒式存储器,磁带盒及记录和再现系统 (Cassette memory, magnetic tape cassette and recording and reproducing system ) 是由 足立直大 中塩栄治 阿武和男 栃久保伸哉 山鹿実 岩间孝信 阿部雅美 于 2019-02-08 设计创作,主要内容包括:一种用于磁带盒的盒式存储器包括:通信单元,其使用由作为无线通信标准的ISO 14443-2标准规定的无线通信方法与记录和再现设备进行通信;非易失性存储器,具有超过16KB的存储容量;及控制单元,以字(2字节)或块(32字节)为单位对非易失性存储器进行数据的写入或读取。非易失性存储器包括具有128KB以下的存储容量的多个存储体。控制单元对多个存储体中的至少一个第一存储体写入或读取由磁带标准规定的数据,及对除第一存储体以外的至少一个第二存储体进行附加数据的写入或读取。(A cartridge memory for a magnetic tape cartridge comprising: a communication unit that communicates with the recording and reproducing apparatus using a wireless communication method specified by the ISO14443-2 standard as a wireless communication standard; a non-volatile memory having a storage capacity of more than 16 KB; and a control unit that writes or reads data to or from the nonvolatile memory in units of words (2 bytes) or blocks (32 bytes). The nonvolatile memory includes a plurality of banks having a storage capacity of 128KB or less. The control unit writes or reads data specified by a magnetic tape standard to or from at least one first bank among the plurality of banks, and writes or reads additional data to or from at least one second bank other than the first bank.)
1. A cartridge memory for a magnetic tape cartridge, comprising:
a communication unit that communicates with the recording and reproducing apparatus using a wireless communication method specified by the ISO14443-2 standard as a wireless communication standard;
a non-volatile memory having a storage capacity of more than 16 KB; and
a control unit that writes or reads data to or from the nonvolatile memory in units of words (2 bytes) or blocks (32 bytes), wherein,
the non-volatile memory includes a plurality of memory banks, each having a storage capacity of 128KB or less,
the control unit writes or reads data specified by a magnetic tape standard to or from at least one first memory bank among the plurality of memory banks, and
writing or reading additional data to or from at least one second memory bank other than the first memory bank.
2. A cartridge memory for a magnetic tape cartridge, comprising:
a communication unit that communicates with the recording and reproducing apparatus using a wireless communication method specified by the ISO14443-2 standard as a wireless communication standard;
a non-volatile memory having a storage capacity of more than 16 KB; and
a control unit that writes or reads data to or from the nonvolatile memory in units of blocks (32 bytes), wherein,
the non-volatile memory includes a plurality of memory banks, each memory having a storage capacity of 2MB or less,
the control unit writes or reads data specified by a magnetic tape standard to or from at least one first memory bank among the plurality of memory banks, and
writing or reading additional data to or from at least one second memory bank other than the first memory bank.
3. The cartridge according to claim 1, wherein said memory bank has a memory capacity of 16KB or more and 128KB or less.
4. The cartridge according to claim 2, wherein the memory bank has a storage capacity of 16KB or more and 2MB or less.
5. The cartridge according to claim 1, wherein the additional data is management ledger data specified by JIS Z6019.
6. The cartridge according to claim 1, wherein the additional data is a management table for managing a file system.
7. The cartridge according to claim 6, wherein said file system is a linear tape file system.
8. The memory cartridge according to claim 1, wherein the additional data is a copy of data written to the first memory bank or an error correction code.
9. The memory cartridge according to claim 1, wherein the nonvolatile memory further comprises a bank switch register for switching the plurality of banks.
10. A magnetic tape cartridge comprising the cartridge according to claim 1 or 2.
11. A recording and reproducing system comprising:
a magnetic tape cartridge comprising the cartridge according to claim 1 or 2; and
a recording and reproducing apparatus configured to be capable of loading or unloading the magnetic tape cartridge.
Technical Field
The present disclosure relates to a cartridge memory, a magnetic tape cartridge, and a recording and reproducing system.
Background
Magnetic recording media are widely used for the storage of electronic data. In particular, a magnetic tape having a low cost per data unit capacity has attracted attention and is used as a recording medium used in a cloud storage service in a data center or the like together with a Hard Disk Drive (HDD).
Magnetic tapes that conform to the Linear Tape Open (LTO) Ultrium standard are widely used as magnetic tapes. A noncontact nonvolatile memory using RF wireless communication, called a Cartridge Memory (CM), is embedded in a magnetic tape cartridge conforming to the LTO Ultium standard (see patent document 1, for example). For example, information such as manufacturing information, drive use history, and vendor specific management information is written to the cartridge. By loading the magnetic tape cartridge into the drive and then the drive reading the above information from the cartridge memory, the use of the magnetic tape cartridge or the like can be checked in a short time.
As the storage capacity of magnetic tape conforming to the LTO standard increases, the storage capacity of the cartridge needs to increase. This is because the amount of information written to the cartridge increases according to the storage capacity of the magnetic tape.
[ citation list ]
[ patent document ]
Patent document 1: japanese patent application laid-open No.2003-109353
Disclosure of Invention
Problems to be solved by the invention
However, the Liner Tape Open Generation 8(LTO-8) or IBM3592 standards specify the storage capacity of a cartridge as 16 KB. Therefore, if the storage capacity of the cartridge is increased beyond 16KB according to the increase of the information written to the cartridge, compatibility with the existing standard described above may be lost.
An object of the present disclosure is to provide a cartridge memory, a magnetic tape cartridge, and a recording and reproducing system, which can improve a storage capacity while maintaining compatibility with existing standards.
Solution to the problem
In order to solve the above problems, the first disclosure is
A cartridge memory for a magnetic tape cartridge, comprising:
a communication unit that communicates with the recording and reproducing apparatus using a wireless communication method specified by the ISO14443-2 standard as a wireless communication standard;
a non-volatile memory having a storage capacity of more than 16 KB; and
a control unit that writes or reads data to or from the nonvolatile memory in units of words (2 bytes) or blocks (32 bytes), wherein,
the non-volatile memory includes a plurality of memory banks, each having a storage capacity of 128KB or less,
the control unit writes or reads data specified by a magnetic tape standard to or from at least one first memory bank among the plurality of memory banks, and
writing or reading of additional data is performed to at least one second memory bank other than the first memory bank.
The second disclosure is
A cartridge memory for a magnetic tape cartridge, comprising:
a communication unit that communicates with the recording and reproducing apparatus using a wireless communication method specified by the ISO14443-2 standard as a wireless communication standard;
a non-volatile memory having a storage capacity of more than 16 KB; and
a control unit that writes or reads data to or from the nonvolatile memory in units of blocks (32 bytes), wherein,
the non-volatile memory includes a plurality of memory banks, each having a storage capacity of 2MB or less,
the control unit writes or reads data specified by a magnetic tape standard to or from at least one first memory bank among the plurality of memory banks, and
additional data is written or read to or from at least one second memory bank other than the first memory bank.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present disclosure, it is possible to increase the storage capacity while maintaining compatibility with existing standards. Note that the effects of the present disclosure are not necessarily limited to the effects described herein, but any effects described in the present disclosure or effects different therefrom.
Drawings
Fig. 1 is a schematic diagram of a recording and reproducing system according to a first embodiment of the present disclosure.
Fig. 2 is an exploded perspective view of the tape cartridge.
FIG. 3 is a block diagram of a cartridge.
FIG. 4 is a block diagram of a non-volatile memory.
Fig. 5 is a flowchart for explaining an example of the operation of the recording and reproducing system according to the first embodiment of the present disclosure.
Fig. 6 is a flowchart for explaining an example of the operation of the recording and reproducing system according to the second embodiment of the present disclosure.
Fig. 7 is a flowchart for explaining an example of the operation of the recording and reproducing system according to the third embodiment of the present disclosure.
Fig. 8 is a flowchart for explaining an example of the operation of the recording and reproducing system according to the fourth embodiment of the present disclosure.
Fig. 9 is a block diagram of a variation of the non-volatile memory.
Fig. 10 is a block diagram of a variation of the nonvolatile memory.
Detailed Description
Embodiments of the present disclosure will be described in the following order. Note that, in all the drawings of the following embodiments, the same reference numerals will be assigned to the same or corresponding portions to each other.
1 first embodiment (example of recording and reproducing System)
Second embodiment (example of recording and reproducing System)
Third embodiment (example of recording and reproducing System)
Fourth embodiment (example of recording and reproducing System)
Modification 5
<1 first embodiment >
[ configuration of recording and reproducing System ]
As shown in fig. 1, a recording and reproducing
(recording and reproducing apparatus)
The recording and reproducing
The reader/
The
The
The
(magnetic tape cassette)
The
As shown in fig. 3, the
The
The
As shown in FIG. 4, the
The
Each of the banks BK0 to BK3 has a storage capacity of 128KB or less, preferably 16KB or more and 128KB or less. The bank (first bank) BK0 corresponds to a storage area of an existing cartridge conforming to the LTO-8 or IBM3592 standard. The normal data is written to the
The banks (second banks) BK1 to BK3 correspond to extended memory areas of the memory area of the above-described conventional cartridge. Additional data is written to the banks BK1 through BK 3. Here, the additional data represents data not specified in the LTO-8 or IBM3592 standards. Examples of the additional data include, but are not limited to, management ledger data, a copy of normal data written to the bank BK0, an error correction code of normal data written to the bank BK0, index information, and the like.
The
The
In response to a request from the
In response to a request for writing or reading normal data from the
The
[ operation of recording and reproducing System ]
An example of the operation of the recording and reproducing
First, when a magnetic tape cartridge is loaded into the recording and reproducing
In the case where a response that the cartridge has the expanded storage area is not returned from the cartridge in response to the inquiry at step S11, the
In the present specification, a "general cartridge" means a conventional cartridge conforming to the LTO-8 or IBM3592 standards, that is, a cartridge having a storage capacity of 16kB without expanding a storage area. Further, the extended storage area indicates a storage area exceeding 16kB (i.e., storage space of the banks BK1 through BK3) specified in the LTO-8 or IBM3592 standards.
In the case where it is determined in step S11 that the magnetic tape cartridge has an ordinary cartridge memory, the following write or read processing of ordinary data is performed. That is, if the
In the case where it is determined in step S11 that the cartridge is the
Next, in step S15, the
Next, in step S16, the
In the event that determination is made in step S13 that the write or read process for the additional data has not been performed, but a request for writing or reading the normal data has been made, the
When the
Although the above operation describes an example of writing the additional data to the bank BK1, the additional data may be written to the bank BK2 or the bank BK3 as an extended storage area other than the bank BK 1. Further, in the event that the additional data is too large for the storage capacity of bank BK1 to be sufficient, the additional data may be written across banks BK1 and BK2 or across banks BK1, BK2, and BK 3.
[ Effect ]
In the recording and reproducing
<2 second embodiment >
The second embodiment describes an example of writing a copy of the normal data written in the bank BK0 or an error correction code of the normal data written in the bank BK0 as additional data in the extended memory area.
[ configuration of recording and reproducing tape System ]
A copy of the normal data (additional data) written in the bank BK0 or an error correction code (additional data) of the normal data written in the bank BK0 is written in the bank BK1 as an extended storage area.
After writing the normal data to the bank BK0, the
In the case where the normal data is read from the bank BK0 and supplied from the
In the case where the
[ operation of recording and reproducing tape System ]
An example of the operation of the recording and reproducing
In the case where it is determined in step S11 that the cartridge is the
Next, in step S24, the
Next, in step S25, the
Next, in step S26, the
Here, the "ordinary recording and reproducing apparatus" denotes a conventional recording and reproducing apparatus which can write or read data to or from a storage area of an existing cartridge, i.e., a 16kB storage area (bank BK0) specified by the LTO-8 or IBM3592 standards, but cannot write or read data to or from extended storage areas (storage areas BK1 to BK 3).
Although the above operation describes an example in which a copy of the normal data or an error correction code of the normal data is written to the bank BK1, a copy of the normal data or an error correction code thereof may be written to the bank BK2 or the bank BK 3.
[ Effect ]
In the recording and reproducing
<3 third embodiment >
The third embodiment describes an example of writing management ledger data to an extended storage area or reading management ledger data from an extended storage area.
[ configuration of recording and reproducing tape System ]
Management ledger data (additional data) specified in JIS Z-6019 is written in the bank BK1 as an extended storage area. Although an example of writing the management ledger data to the bank BK1 is described herein, the management ledger data may be written to the bank BK2 or the bank BK3 that is an extended storage area other than the bank BK 1. Further, in the case where the management ledger data is too large to be sufficient for the storage capacity of the bank BK1, the management ledger data may be written across the banks BK1 and BK2 or across the banks BK1, BK2 and BK 3.
The
In response to a request from the
[ operation of recording and reproducing tape System ]
An example of the operation of the recording and reproducing
In the case where it is determined in step S11 that the cartridge is the
First, in step S31, the
Next, in step S33, the
Next, in step S34, the
In the case where it is determined in step S31 that the write or read process to the deposit ledger has not been performed but the ordinary read or write process has been requested, the
[ Effect ]
The recording and reproducing
On the other hand, without writing the management ledger data, the normal data may be written to the bank BK0 or read from the
JIS Z-6019 stipulates that management ledger data is written in a memory for file management, where management ledger data is required for each file to be managed. As the capacity of the tape increases, the number of files that may be written increases, and thus the 16KB storage capacity established by LTO-8 is insufficient. Therefore, the conventional recording and reproducing system needs to record the management ledger data on the magnetic tape simultaneously with the file, and also needs to access the magnetic tape each time the management ledger data is to be accessed. Therefore, a search for necessary information is performed after reading all information stored on the magnetic tape, and thus, the magnetic tape that does not read data electrically but physically has a problem in that it takes time to search.
<4 fourth embodiment >
The fourth embodiment describes an example of writing index information to or reading index information from an extended storage area.
[ configuration of recording and reproducing tape System ]
The index information is written in the bank BK1 as an extended storage area. The index information is a management table (additional data) for managing the file system. For example, the file system is a Linear Tape File System (LTFS).
Although an example of writing index information to the bank BK1 is described herein, the index information may be written to the bank BK2 or BK3, which is an extended storage area, other than the bank BK 1. Further, in the case where the index information is too large to be sufficient in the storage capacity of the bank BK1, the index information may be written across the banks BK1 and BK2 or across the banks BK1, BK2, and BK 3.
The
In response to a request from the
[ operation of recording and reproducing tape System ]
An example of the operation of the recording and reproducing
In the case where it is determined in step S11 that the cartridge is the
First, in step S41, the
Next, in step S43, the
Next, in step S44, the
In the case where it is determined in step S41 that the write or read process of the index information has not been performed but the write or read of the normal data has been requested, the
[ Effect ]
In the LTFS specification, the tape is divided into partitions so that approximately 4% of the tape capacity is reserved for writing LTFS index information. Magnetic tape is, by its nature, suitable for sequential access, but not for random access. Even in the case of updating a file, data is additionally written, and the file before update is not deleted but only invalidated. The accompanying LTFS index information is also repeatedly added to the LTFS index partition. Therefore, to access a file, the LTFS index partition must be searched and the latest index information found on tape. Due to this operation, the conventional recording and reproducing system has a problem that the speed of the tape system using the LTFS is slow. Furthermore, to achieve some degree of acceleration, tape library vendors recommend an option that can achieve acceleration by having the cartridge store the location on the tape within the limits of the cartridge's capacity (16 KB for LTO 8) using the latest LTFS index information.
The recording and reproducing
<5 modification >
Although the first to fourth embodiments of the present disclosure have been described in detail above, the present disclosure is not limited to the above first to fourth embodiments, but may be modified in various ways based on the technical idea of the present disclosure.
For example, the configurations, methods, steps, numerical values, and the like described in the above-described first to fourth embodiments are merely examples, and configurations, methods, steps, numerical values, and the like different therefrom may be used as necessary.
In addition, the configurations, methods, steps, numerical values, and the like of the above-described first to fourth embodiments may be combined with each other without departing from the spirit of the present disclosure.
Although the above first to fourth embodiments describe examples in which the bank memories are configured with the four banks BK0 to BK3 using four 16KB memories, the configuration of the bank memories is not limited thereto.
For example, as shown in FIG. 9, a distinct quad-bank memory may be configured by using a
Further, as shown in fig. 10, a two-bank memory having 128KB per bank can be configured by using the
The above first to fourth embodiments describe the
The above first to fourth embodiments describe the case where each of the plurality of banks included in the
Although the above first to fourth embodiments describe the case where the present disclosure is applied to a recording and reproducing apparatus, the present disclosure is not limited thereto, but may be applied to a library apparatus, a storage system, or the like.
Further, the present disclosure may also adopt the following configuration.
(1)
A cartridge memory for a magnetic tape cartridge, comprising:
a communication unit that communicates with the recording and reproducing apparatus using a wireless communication method specified by the ISO14443-2 standard as a wireless communication standard;
a non-volatile memory having a storage capacity of more than 16 KB; and
a control unit that writes or reads data to or from the nonvolatile memory in units of words (2 bytes) or blocks (32 bytes), wherein,
the non-volatile memory includes a plurality of memory banks, each having a storage capacity of 128KB or less,
the control unit writes or reads data specified by a magnetic tape standard to or from at least one first memory bank among the plurality of memory banks, an
Writing or reading of additional data is performed to at least one second memory bank other than the first memory bank.
(2)
A cartridge memory for a magnetic tape cartridge, comprising:
a communication unit that communicates with the recording and reproducing apparatus using a wireless communication method specified by the ISO14443-2 standard as a wireless communication standard;
a non-volatile memory having a storage capacity of more than 16 KB; and
a control unit that writes or reads data to or from the nonvolatile memory in units of blocks (32 bytes), wherein,
the non-volatile memory includes a plurality of memory banks, each having a storage capacity of 2MB or less,
the control unit writes or reads data specified by a magnetic tape standard to or from at least one first memory bank among the plurality of memory banks, an
Writing or reading of additional data is performed to at least one second memory bank other than the first memory bank.
(3)
The memory cartridge according to (1), wherein the memory bank has a memory capacity of 16KB or more and 128KB or less.
(4)
The memory cartridge according to (2), wherein the memory bank has a memory capacity of 16KB or more and 2MB or less.
(5)
The cartridge according to any one of (1) to (4), wherein the additional data is management ledger data specified by JIS Z6019.
(6)
The cartridge according to any one of (1) to (4), wherein the additional data is a management table for managing a file system.
(7)
The cartridge according to (6), wherein the file system is a linear tape file system.
(8)
The memory cartridge according to any one of (1) to (4), wherein the additional data is a copy of data written to the first memory bank or an error correction code.
(9)
The memory cartridge according to any one of (1) to (8), wherein the nonvolatile memory further includes a bank switch register for switching the plurality of banks.
(10)
A magnetic tape cartridge comprising the cartridge memory according to any one of (1) to (9).
(11)
A recording and reproducing system comprising:
a magnetic tape cartridge comprising the cartridge according to any one of (1) to (9); and
a recording and reproducing apparatus configured to be capable of loading or unloading the magnetic tape cartridge.
List of reference numerals
Tape cassette (10)
11 cartridge memory
20 recording and reproducing apparatus
21 reader/writer
22 recording and reproducing unit
23 System controller
24 interface
31 antenna coil
32 rectification power supply circuit
33 clock circuit
34 detector/modulator circuit
35 controller
36 non-volatile memory
41 Bank switching register
42 multiplexer
100 recording and reproducing system
200 external computer
BK0 memory bank (first memory bank)
BK 1-BK 3 banks (second bank)
MT magnetic tape
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