JPS61211805A - magnetic tape device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Summary] Cylindrical magnetic tape
When it is impossible to identify the L-EV 13N10DD of the data stripe, use the specific pattern recorded on the Zapotranok to identify the EV IEN/01) f)
+11 discrimination is possible.

[Industrial application field]

The present invention relates to a magnetic tape device using two cylindrical magnetic tapes, and particularly relates to a data stripe E V IENlo
The present invention relates to a magnetic tape device equipped with means for accurately and quickly determining DD.

[Conventional technology]

Recently, a relatively small magnetic tape device using a magnetic tape of the same type as the cylindrical magnetic tape of MSS (Massive Capacity 1,0 System) has been developed and is now in widespread use.

Description of this cylindrical 6-air tape 1. It is as shown in Figure 2 of the A-type. In the figure, l l, l magnetic tape, 21J: II') l ~ rack, 3 to 76 are respectively 1-botranok Sl to S4. 7 is a data stripe, its) et al. 7 a 4J: T type V
E N Strive and 7b is called D S1-R Live. 8+;I: represents iriki heno 1-,
9 and IOB;j respectively EV1, I and OD1') are arrows indicating the scanning direction with respect to EV1 and IOB7b.

The data store 7 (J) is provided with an angle of 17.5 degrees relative to the longitudinal direction of the magnetic tape 1.

By scanning the magnetic tapes 71 and 8 over the magnetic tape 1 in the direction of the arrow 9 or 10, the IDl/rack, Lee-Botovnok Sl, S2 . EVEN stripes and tribute; I: OD D Strike Live, Sub'-Bo [Rack S3. S4 is accessed in turn.

[', V r4. N strike uib to (') II)
11) Stripe discrimination is performed using identification information tlJ recorded in +11)1 to -C.

[Problems to be solved by the invention] Conventional magnetic tape device-C (J', , 1.EV
Ic Ns1 Live and (1) I) 1. ) strike
1) I hook Q) The read output is lined with 31), so there are scratches on the rack and poor quality. If the value of the data becomes extremely low, a situation arises in which it is impossible to separate the 7. data processing efficiency. Person 3 [
In addition to the present invention &, Ji, I D I, Utsuku, there is also a smell in the Repo I rack.
DI? , N 10 D f), record a specific pattern at a specific position, detect this specific pattern from the repo waveform, and 7'C1 1- from that position.
(7) Make it useful for discerning money.

For this reason, the magnetic tape device detects a specific pattern from the repo waveform, identifies the pattern detection circuit, and the 4IR position for detecting the specific pattern.
F, V E N /' OI) 1. ) to determine E
VI4N10DD discrimination circuit is installed.

[Effect]

I D l-Due to the quality of the rack, EVEN/ODD
If it is not possible to make a determination, a specific pattern is detected from the first servo waveform and the determination is made again.

〔Example〕

Hereinafter, details of the present invention will be explained by way of examples.

For convenience, FIG. 2 showing the recording format of the cylindrical magnetic tape explained in the section of the prior art will also be used here as is. However, as will be described later, the servo tracks S1 and 52 (3 and 4) have one <EVE according to the present invention.
It is assumed that a specific pattern for N10DD live identification (in this embodiment, a signal with twice the frequency: 2F signal) is recorded.

FIG. 3 shows that the magnetic head 8 in FIG. 2 has an EVEN stripe 7.
When scanning over a, and in FIG. 1-U7 show the output waveform and the evening/timing relationship of the accompanying signal.

First, in Figure 3, 11 is E V If N strike.
This is the output waveform obtained by scanning the
2 is the waveform of the IDl-rack section, 1; 3 is the waveform of the Nahotolanok S1 section, 14 is the waveform of the beam I-rack S2 section, 15 is the data waveform, 101 and 102 beams'
- Represents a specific pattern of signals recorded on the point racks S1 and S2. Note that a 2F signal is used for the specific pattern. The 2F signal is an alternating signal of frequency F recorded on the servo controller at a specific position (101, 102
, 103, 104), which is given by 2 and 2.

Next, 16 is the amplifier sense signal ASNS ID created from the waveform 12 of the lI]-rank portion, and 17 is the servo data ID obtained by slicing the waveform 13 of the I-botrusoku S1 portion at a certain slice level 100. No. A
SNS Sl. 18 is.

Similarly, the one-voice data signal ASNS S2 obtained by slicing the waveform 14 of the servo track 32 portion is obtained.

19B→Novo data signal ASNS 2 is a signal that turns ON when a specific pattern signal lot in St is detected.
Usually called 2FSI. The same applies to 20, which is called 2FS2.

2], 22ca,, up the counter described later
/Down switching signal imp SI+ up S2 is inverted at 2F signal 19.20.

23.241J: , in I to be described later] - Evening timing signal generated from the Tatako disc Wll) ARA, SV
A R], 25.264, the new generated signal according to the present invention
ENI.

It is EVEN2.

Next, in FIG. 4, ζl, J: , 291. JOD
I) The output waveform obtained by scanning the slide 1-live by 1%, and the other 30 are the waveforms of the I D l-rack part,
31 i, l waveform of Napotranok S1 portion; 32 waveform of ribbon 1 to rack S2 portion; 33 data waveform;
103 and 104 are servo I racks S1 and S2
It represents a specific pattern signal (2F signal 'i+) recorded in .

Furthermore, the signals 34Zr to 744 in FIG.
Signals 16 to 2G in the figure correspond to the first song number, j. However, No. 18 Meguchi at signal 41, 43, 44.

Respectively W I D A scale A, 01) 1) 1.01')
l) 2.

OD I) The 40th part 5 (which shows the relationship between the 1st issue and the 1st issue that is missing from the S1 live) is almost the same as Figure 3.

I will not repeat the detailed explanation here, but the important points are: 0Dr) S1-Live output waveforms
1) Track part waveforms 30 and 2 Repo I-Rack S
The waveforms 31 and 32 of the t and S2 portions are the waveforms + in Fig. 3.
2. lL] 4 and (''different/i'C) (iii+after is inverted).In other words, the difference number 41 between the 1-type Z-shaped output waveform (l I'i) and Li °-H) ．．
Other 5 in FIG. 4 corresponding to signals 16 to 726 in FIG.
) ; 34 The difference between AC and 44 and 2 ( appears.

Figure 1 +1. , + is a configuration diagram of a magnetic tape dipping method according to an embodiment of the invention;

At the first rλI, two magnetic tapes 50-1. = information is.

to magnetic) F5], preamplifier 52. I) Amplifier sense detection circuit 54 as the amplified signal 72 via the main amplifier 53. Leebo amplifier 1! detection circuit 5
5.2F detection circuit 56-.

The octopus sensor 68 detects the slit of the rotary octopus disk 67 having 24 (captive sulin I) and sends the signal 94 to the octopus receiving circuit 69.The octopus receiving circuit 69 outputs the timing A signal 71 is sent to each detection circuit 54.55°56.

+D amplifier sense detection circuit 54 receives the amplified signal 7
2 and the timing signal 71.

An amplifier sense signal 73 in the IDI/rack section is created. The amplifier sense signal 73 is sent to the EVEN10DD discrimination circuit 58 and the ID error generation circuit 59, and in the EVEN10DD discrimination circuit 58, the EVEN/O
Determination of DD is performed.

Similarly, the servo amplifier sense detection circuit 55 creates an amplifier sense signal 75 in the servo trunk portion.

The 2F detection circuit 56 detects the special pattern (2F) in the MuJ2 Leebo data and outputs 1]5 for 1 hit/1.
] As O1, J port switching No. 18, power/nonta circuit 57 is sent.

The counter circuit 57 i; t:, the power amplifier sense Shinso (hereinafter referred to as "Narvo data") is turned on (4), but the 2F (fi No. 9
When 5 is manually operated, the up/rlow direction is Il,
Change lJ.

In other words, 21.22, 39.40 in Figures 3 and 4
Servo data 17, 18, 35 as shown in
．． At the beginning of 36, the counter circuit 57 is in up mode,
When the 2F signal 95 is detected, the mode becomes DOpn mode.

By the way, what is the position of the 2F signal in the 4j-bo data?

EVEN stripes and Of) Ds 1 ~ Live are different (see 101, 102 and 103.104)
. Therefore, as a matter of course, the count result 74 of the counter will be EVENloDD and will be different.

In this embodiment, this count result 74 is
Input to 10DD discrimination circuit 60. E V l':
N/ODD discrimination circuit ■60, EVENloDD
For example, set the count tolerance for each
EVEN/ODD is determined within the allowable values (around -80 for VEN and around +120 for ODD).

If Callan 1 to Result 74 do not fall within this tolerance, ID error generation circuit 61 is activated.

Notify the error status 90 to the TD error reporting circuit 65. ID error reporting circuit 65 is the host controller 6
This is for creating sense information 93 for 6.

EVEN/ODD discrimination circuit ■62 is EVEN10DD
Discrimination circuit (2) 58 When the discrimination circuit 58 is present, the self-output cuff 9 is suppressed. That is,
In the ID track part.

EVEN10DD discrimination circuit ■58 discrimination circuit top 58 signal 7
If ODD/EVEN can be normally determined based on 3, the determination by the servo track is unnecessary, and at the same time, confusion on the host controller side is avoided.

Therefore, when the EVEN10DD determination using 1[) is impossible due to the failure of l+')l~rank, the determination of EVENloDI) using the servo I/rack is executed.

Finally, the EVIN10f)D reporting circuit 63 outputs 1. D) EVENloDI) discrimination signal 77 of the rack and EVEN/OI) by the servo I-rack
f) The discrimination signal 79 is logically ORed and the result 91
Each time it is sent to the controller 66 as

Finally, the ID error generation circuit 59 cannot detect the amplifier sense signal due to IDI/rank defects, etc., and as a result, the EV
It detects that EN10DD cannot be determined.
Its output is 78, and 64 of the ID error reporting circuit.
sent to. The ID error reporting circuit 64 is for creating a sense byte 92 to be sent to the upper controller 66.

〔Effect of the invention〕

As described above, according to the present invention, EV17. Even when it is impossible to determine the N10DD stripe, the determination is performed again using the waveforms of the secondary servo 1 to rank, so that reliable and efficient recording and reproducing processing is possible.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an apparatus according to an embodiment of the present invention, FIG. 2 is an explanatory diagram of the recording format of a cylindrical magnetic tape, and FIGS. and FIG. 6 is a timing diagram showing signal waveforms during ODD stripe scanning. In FIG. 1, 50 is a magnetic tape, 51 is a magnetic head, 54 is an ID amplifier sense detection circuit, 55 is a servo amplifier sense detection circuit, 56 is a 2F detection circuit, 57 is a counter circuit, 58 is an EVEN10DD discrimination circuit, 60 baE
V E N10 D D discrimination circuit ■, 62 is EVEN
/ODD discrimination circuit■, 63 is an EVEN10DD reporting circuit, 66 is a controller, 61 is a rotor tacho disc, 6
9 represents a tacho receiver circuit.

Claims (1)

[Claims] A magnetic tape device that uses a cylindrical magnetic tape as a medium, has an ID track, four servo tracks, and a data stripe on the medium, and has a write/read head that scans at a predetermined angle with respect to the longitudinal direction of the tape. , A specific pattern is recorded on the servo track on the medium at a predetermined specific position corresponding to EVEN/ODD of the data stripe, and when the write/read head scans the servo track, a pattern detection circuit that detects the position of a specific pattern in the servo waveform that is detected, and an EVEN/ODD circuit that checks whether the position of the detected specific pattern is within the discrimination tolerance range and discriminates whether the data stripe is EVEN/ODD.
1. A magnetic tape device comprising: an ODD discrimination circuit.