Digital Equipment RW504-ZA, Service Manual

Page: 24 / 220

1.7 Optical Disk Specifications
Table 1–3 Specifications and Characteristics of Optical Disks
Physical Characteristics Rewritable Write-once
Disk 5.25 in. diameter (130 mm) 5.25 in. diameter (130
mm)
Capacity (512-byte
sectors) (1x)
1
594 Mbytes (297 Mbytes/side)
(formatted) 594 Mbytes (297 Mbytes
/side) (formatted)
Capacity (512-byte
sectors) (2x)
2
1.2 Gbytes (594 Mbytes/side)
(formatted) 1.2 Gbytes (594 Mbytes
/side) (formatted)
Format (1x) Continuous Composite (CC)
(ISO 10089) CCW (ISO 11560)
Format (2x) Continuous Composite (CC)
(ISO 10089),ECMA 184 for CC
format CCW (ISO 11560), ECMA
184 standard for CCW
format
Bytes per sector 512 (medium dependent) 512 (medium dependent)
Sectors per track 31 (medium dependent) 31 (medium dependent)
Physical tracks per side
(1x) 18751 18751
Physical tracks per side
(2x) 21600 21600
Physical tracks per inch
(1x) 15875 15875
Physical tracks per inch
(2x) 18273 18273
Error Rate Less than 1 block in error per
10 14
bytes
Less than 1 block in error
per
10 14
bytes
Security Write protect tab (1 per side) Write protect tab (1 per
side)
Medium archival life 30 years 30 years
1
In this table, 1x refers to 594-Mbyte.
2
In this table, 2x refers to 1.2-Gbyte.
(continued on next page)
1–12 Introduction