1、INTERNATIONAL STANDARD ISO/IEC 9171-2 First edition 1990-12-15 Information technology - 130 mm optical disk cartridge, write once, for information interchange - Part 2: Recording format Technologies de linformation - Cartouche de disque optique de 130 mm, non-kinscrip tible, pour r - the environment
2、 in which the characteristics are to be tested; - the environment in which the cartridge is to be operated and stored; - the mechanical, physical and dimensional characteristics of the case and of the optical disk; - the optical characteristics and the recording characteristics for recording the inf
3、ormation once and for reading it many times, so as to provide physical interchangeability between data processing systems. ISO/IEC 9171-1 and ISO/IEC 9171-2, together with a standard for volume and file structure, provide for full data interchange between data processing systems. INTERNATIONAL STAND
4、ARD ISO/IEC 9171-2:1990 (E) Information technology - 130 mm optical disk cartridge, write once, for information interchange - Part 2: Recording format 1 *ape This part of ISO/IEC 9171 specifies two formats for the physical disposition of the tracks and sec- tors, the error correction codes, the modu
5、lation methods used for recording and the quality of the recorded signals. 2 Conformance An optical disk is in conformance with Part 2 of this International Standard if it meets all manda- tory requirements of clause 4 and either those of clause 5 or those of clause 6. A prerequisite for conformance
6、 with this part of ISO/IEC 9171 is conformance with ISO/IEC 9171-l. 3 Conventions and notations The following conventions and notations apply in this part of ISO/IEC 9171. 4 In each field the information is recorded so that the most significant byte (byte 0) is recorded first. Within each byte the l
7、east significant bit is numbered bit 0, the most significant bit (i.e. bit 7 in an JO specify, at constant pulse width, the write power P, in milliwatts indicated by the manufacturer of the disk. P, is expressed as a number n between 0 and 255 such that n=5P, In these bytes T stands for the constant
8、 pulse width, T for the time length of one Channel bit and r for the radius considered. Byte 22 This byte shall specify P, for: T = T x 1 ,OO r = 30mm Byte 23 This byte shall specify P, for: T = TX I,00 r = 45mm Byte 24 This byte shall specify P, for: T = T x 1,OO I = 60mm Byte 25 This byte shall sp
9、ecify P, for: T = T x 0,50 r = 30mm Byte 26 This byte shall specify P, for: T = TX 0,50 r = 45mm Byte 27 This byte shall specify P, for: 7- = T x 0,50 r = 60mm Byte 28 This byte shall specify P, for: T = T x 0,25 r = 30mm Byte 29 This byte shall specify P, for: T = T x 0,25 r = 45mm 10 ISO/IEC 9171-
10、2:1990 (E) Byte 30 This byte shall specify P, for: T = T x 0,25 r = 60mm Byte 31 This byte shall specify a constant write power P, in milliwatts as a number n between 0 and 255 such that Byte 32 n= 5P, This byte shall specify the write pulse width Tp in nanoseconds expressed by a number n between 0
11、and 255 such that n = Tp for the constant write power specified by byte 31 and at a radius r = 30 mm. Byte 33 This byte shall specify the write pulse width Tp in nanoseconds expressed by a number n between 0 and 255 such that n = Tp for the constant write power specified by byte 31 and at a radius r
12、 = 45 mm. Byte 34 This byte shall specify the write pulse width Tp in nanoseconds expressed by a number n between 0 and 255 such that n = Tp for the constant write power specified by byte 31 and at a radius r = 60 mm. Bytes 35 to 47 These bytes shall be set to (FF). (See also Annex A). Byte 48 This
13、byte shall specify, at wavelength L1, the rotational frequency N2 in hertz as a number n between 0 and 255 such that Byte 49 n = N2 This byte shall specify the maximum read power P2 in milliwatts for the User Zone as a number n between 0 and 255 such that Bytes 50 to 62 n = 2OP2 For the values speci
14、fied in bytes 18, 19, 48 and 49, bytes 50 to 62 shall specify the parameters indicated in bytes 22 to 34. ISO/lEC 9171-2:1990 (E) Bytes 63 to 75 These bytes shall be set to (FF). Byte 76 This byte shall specify, at wavelength L1, rotational frequency N3 in hertz expressed as a number n between 0 and
15、 255 such that Byte 77 n = N3 This byte shall specify the maximum read power P3 in milliwatts for the user zone, as a number n between 0 and 255 such that Bytes 78 to 90 n = 20 P3 For the values specified in bytes 18, 19, 76 and 77, bytes 78 to 90 shall specify the parameters indicated in bytes 22 t
16、o 34. Bytes 91 to 103 These bytes shall be set to (FF). Byte 104 This byte shall specify, at wavelength L 1, rotational frequency N4 in hertz as a number n between 0 and 255 such that Byte 105 n = N4 This byte shall specify the maximum read power PJ in milliwatts for the user zone as a number n betw
17、een 0 and 255 such that Bytes 106 to 118 n = 2OP4 For the values specified in bytes 18, 19, 104 and 105, bytes 106 to 118 shall specify the para- meters indicated in bytes 22 to 34. Bytes 119 to 131 These bytes shall be set to (FF). Byte 132 This byte shall specify wavelength L2 in nanometres as a n
18、umber n between 0 and 255 such that n = 115 L2 Byte 133 This byte shall specify the baseline reflectance R2 at wavelength L2 as a number n between 0 and 100 such that n = lOOR 12 ISO/-lEC 9171-2:1990 (E) Bytes 134 to 245 The allocation of information to, or the setting of, these bytes shall correspo
19、nd to those of bytes 20 to 131. The values specified shall be for L2 (byte 132) and R2 (byte 133). Byte 246 This byte shall specify wa.velength L3 in nanometres as a number n between 0 and 255 such that Byte 247 n = l/5 L3 This byte shall specify the baseline reflectance R3 at wavelength L3 as a num
20、ber n between 0 and 100 such that Bytes 248 to 359 n = 100 R3 The allocation of information to, or the setting of, these bytes shall correspond to those of bytes 20 to 131. The values specified shall be for L3 (byte 246) and R3 (byte 247). Bytes 360 to 383 These bytes shall be set to (FF). (See also
21、 Annex A). 13 ISO/IEC 9171-2:1990 (E) Table 2 - Summary of media information in the SFP Zone . - Mandatory / P / RI (19) Ll (18) %) Construe N2 P, - (50) to (62) (48) (49) ;6) ;!77) - (78) to (90) - (106) to (118) (104) (105) Set to (FF) I (35 to 47) (63) to (75) (91) to (103) (119) to (131) Nl P, -
22、 (136) to (148) (149) to (161) (134) (135) L2 - R2 P, - (164) to (176) (177) to (189) (132) N2 (133) (162) (163) N3 P, - (192) to (204) (205) to (217) (190) (191) ) %4 P; - (220) to (232) (233) to (245 (21f3) (219) L3-R (246) ($47 1 Q Nl (248) N2 (276) N (304) N4 (332) 4.5.3 System Information P, (2
23、49) pr (277) P, (305) P, (333) - (250) to (262) (263) to (275) - (278) to (290) (291) to (303) - (306) to (318) (319) to (331) _ (334) to (346) (347) to (383) Bytes 384 and 385 specify in binary notation the track number N of the last track in the User Zone. The total number of tracks in this zone i
24、s (N + 1). Byte 384 This byte shall specify the most significant byte of this number. Byte 385 This byte shall specify the least significant byte of this number. Bytes 386 to 479 4.5.4 These bytes shall be set to (FF). (See also Annex A). Unspecified Content The contents of bytes 480 to 511 are not
25、specified by this part of ISO/IEC 9171. They shall be ignored in interchange. 14 ISO/IEC 9171-2:1990 (E) 4.6 Requirements for Interchange 4.6.1 Equipment for writing 4.6.2 4.6.2.1 The disk under test shall have been written with arbitrary data by a disk drive for data inter- change use in the operat
26、ing environment. Data shall be recorded in such a way that the requirements of 4.6.5 are met. Test equipment for reading General 4.6.2.2 4.6.2.3 4.6.2.4 The read test shall be performed on a test drive in the test environment. The rotational frequency of the disk when reading shall be 30,O Hz f 0,3
27、Hz. The direction of rotation shall be counter-clockwise when viewed from the objective lens. Optical characteristics of the read head x + 15nm 4 wavelength of the laser : 825 nm - 10nm b) wavelength over numerical aperture : 1,59 urn f 0,04 urn cl polarization of the light : circular d) filling of
28、the lens aperture : I,0 max. d variance of the wavefront at the recording A 2/180 max. layer Read power a) the read power for the PEP Zone shall not exceed 0,50 mW, b) the read power for the SFP Zone shall not exceed the value given in byte 6 of the PEP Zone (4.4.3.1.4), cl the read power for the Us
29、er Zone shall not exceed the value given in byte 21 of the SFP Zone (4.5.2). Tracking The open-loop transfer function H for radial and axial tracking shall be H- (2nfJ2 + E - c s2 ( 1 +A 2 7rf,c within an accuracy such that 11 + H 1 does not deviate more than f 20% from its nominal value in a bandwi
30、dth from 30 Hz to 10 kHz, where s = i2lrf The constant c shall be 3. The open-loop 0 dB frequency f0 shall be 1250 Hz for the axial servo and 1740 Hz for the radial servo. The open-loop DC gain of the axial servo shall be at least 100 dB. 15 ISO/IEC 9171-2:1990 (E) 4.6.2.5 Read channel 4 b) Read amp
31、lifier The read amplifier after the photo detector shall have a flat response from 100 kHz to 14,8 MHz within + 1 dB. Amplitude saturation shall not occur. Conversion of analog signals to Channel bits The signals from the read amplifier shall be converted into Channel bits. The con- verter shall wor
32、k properly for signals where the amplitude IL of the lowest occurring frequency is such that Id Id 2 0,8 x - 1 01 I ot and the amplitude fH of the highest occurring frequency is such that within any sector. cl lot is the signal obtained from an unrecorded track when read-on-track; I, is the signal v
33、alue specified in byte 5 of the PEP Zone. Conversion of Channel bits to user bytes The Channel bit patterns shall be converted into 8-bit bytes, including user data, check bytes, etc. (see 5.2.13 and 6.2.4.1). 4.6.3 Requirements for tracking 4.6.4 4.6.4.1 The focus of the read head shall not jump tr
34、acks voluntarily. Requirements for user data 4.6.4.2 4.6.4.3 A byte error shall be a user byte in which one or more bits have a wrong setting, as detected by the error detection and correction circuits. Any sector accepted as valid during the writing process shall not contain byte errors not correct
35、able by the correction algorithm (see 6.2.3 and Annex C). Any sector not accepted as valid during the writing process shall have been rewritten according to the rules for defect management. 4.6.4.4 4.6.5 The rewrite criterion for a sector is not specified in this part of ISO/IEC 9171. The rewrite pe
36、rcentage, which reflects the quality of the disk, is not specified either, and shall be a matter of agreement between purchaser and supplier. Requirement for interchange An interchanged optical disk cartridge meets the requirements for interchangeability if it meets the requirements of 4.6.3 and 4.6
37、.4 when it is written on an interchange drive according to 4.6.1 and read on a test drive according to 4.6.2. 1H - 2 0,4 IL 5 Format A This format is based on a composite continuous servo tracking method. 16 ISO/IEC 9171-2:1990 (E) 5.1 Track layout 5.1.1 Tracking Format A is characterized by continu
38、ous tracking centred between adjacent grooves that are preformed on the disk (land tracking), or continuous tracking centred in a single groove (groove tracking), with the specific method being identified by byte 4 of the Control Track PEP Zone. There shall be no groove in the ODF Marks. Pre-recorde
39、d marks may be obtained by disconti- nuity of the grooves. In all other areas the tracks shall have continuous grooves. One Sector m -+- Pregrooves / 0 0 0 000 m /: when the sectors contain 512 user bytes, there shall be 31 sectors per track numbered 0 to 30. The number of user bytes per sector is s
40、pecified by byte 1 of the PEP and the SFP Zones. The pre-formatted area of 52 bytes, the Header, is the same for both types of Data field. Each bit of an ;r ;a, Buff- % n er C ECCand ALPC Resync 5 12 1 5 8 1 5 8 1 5 1 14 12 3 1259 20 +)4 W-c-)4 W-W4 h-c-)r-4 r-4 44 l l 9 4 b Pre-formatted Header: 52
41、 1274 l l 1360 Figure 7 - Sector format for 1024 user bytes 5 14 4; 4 4 b 2 1 2 135 32 4 *4 =1 -c)d-w1,c- Track no. Sector CRC ODF Gap Flag Gap ALPC no. A ID1 A ID2 A ID3 P ODF Data Field S SM VFOI M VF02 M VF02 M A Flag VFO3 Y ;J;r ;a, Buff- % n er C ECC: Re&c ALPC and (FF) 5 12 1 5 8 1 5 8 1 5 1 1
42、4 12 3 650 15 += b-NW -7-4 w-4 w H-4 m4 l a 5 4 * Pre-formatted Header: 52 665 a l 746 Figure 8 - Sector format for 512 user bytes 20 ISO/IEC 9171-2:1990 (E) 5.2.1 Sector Mark (SM) The Sector Mark shall have a length of 5 bytes and shall consist of pre-recorded, continuous, long marks of different C
43、hannel bits length followed by a lead-in to the VFOl field. This pattern does not exist in data. The Sector Mark pattern shall be as shown in figure 9, where T corresponds to the time length of one Channel bit. The polarity of the signal obtained from a mark is specified by byte 4 of the PEP Zone. T
44、he long mark pattern shall be followed by the Channel bit pattern: 00X0010010 where X is not specified. no mark mark l l 5.2.2 VFO areas l 10T 6T 6T 14T 2 6T 6T 6T 10T +k- 1T Long mark pattern Sector mark Figure 9 - Sector Mark pattern with negative polarity There shall be four areas designated VFOL
45、, VFO2 and VF03 to lock up the VFO. The recorded information for VFOL and VF03 is identical in length and pattern. VFO2 shall be recorded with one of two patterns differing only in the 1st bit and shall be 4 bytes shorter than VFOl and VF03. Since there are three ID fields, and RLL (2,7) modulation
46、coding is used, the pattern chosen for each VF02 will depend on the last byte of the CRC recorded in the preceding ID field (see 5.2.13). The continuous channel bit pattern for VFO areas shall be: VFOl : 192 Channel bits = 01001001001 . . . . 010010 VF02 : 128 Channel bits = 10010010010 _. 010010 VF
47、O2 : 128 Channel bits = 00010010010 . . . . 010010 VF03 : 192 Channel bits = 01001001001 _. 010010 5.2.3 Address Mark (AM) The AM is a channel bit pattern not used in RLL (2,7) and is a run-length violation for RLL (2,7). This 16-bit Channel bit pattern shall be: 0100 1000 0000 0100 21 ISO/IEC 9171-
48、2:1990 (E) 5.2.4 ID fields These fields shall each consist of five bytes. 1st Byte This byte shall specify the most significant byte of the track number. 2nd Byte This byte shall specify the least significant byte of the track number. 3rd Byte Bit 7 and 6 shall specify the ID number. Bit 5 shall be
49、ZERO. Bits 4 to 0 shall specify the sector number. 4th and 5th Bytes These two bytes shall specify a 16-bit CRC computed over the first three bytes of this field (see Annex B). The generating polynomial shall be 5.2.5 The initial setting of the CRC register shall be all ONES. Postamble (PA) 5.2.6 This field shall consist of one byte following the ID3 field. Due to the use of the RLL (2,7) encoding scheme (see 5.2.13), the framing of the last byte of CRC in the ID3 field is uncertain within a few bit times. The Postamble allows the last byte of CRC to achieve clos
