Mode Select(6)

BLOCK DESCRIPTOR

Media Type

Set to “0” (ZERO).

Block Descriptor Length

If “0” (ZERO), there is no block description included in the parameter list. Set to “0” or “8”.

Density Code specifies data type to be transferred. Five (5) parameters are supported. They are

01h

: User data only (2048 bytes/physical sector) [default]

02h

: User data plus auxiliary data (2336 bytes/physical sector)

03h

: Header, user data plus auxiliary data (2340 bytes/physical sector)

04h

:

Audio data only (1/75th of a second per logical block)

05h~FFh

:

Reserved

Number of Blocks

Set to “0” (ZERO).

Logical Block Length specifies logical block size in number of bytes. In the current version, 256, 512, 1024, 2048(default), 2052, 2056, 2336, 2340 and 2352 byte are supported. An external switch on the back of the DRM-602X, DRM-604X and DRM-1804X drives allows the power-on default value to be switched to either 512 or 2048.

PAGE DESCRIPTOR

Page Code indicates the meaning of the data contained in the page.

Page Length is the number of bytes supported for each page. It does not include the page length byte.

The drive will return Check Condition if ECC is enabled and the initiator accesses a Mode 1 or Mode 2 form1 data block and has specified 2336-, 2340-, or 2352 byte length.

When the initiator accesses a Mode 2 form2 data block and has specified 2336-, 2340- or 2352- byte lengths, the ECC must be disabled. The drive will return Check Condition.

The first two bytes of the page descriptor comprise the header which consists of the Page Code and Page Length. Following the header are the page definitions.

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