Commands76
Mode block descriptor
The format of the Mode Parameter block descriptor is as follows:
Mode Parameter block descriptor fields:
Read-Write Error Recovery mode page
The Read-Write Error Recovery mode page has the following format:
Read-Write Error Recovery page fields:
7 6 5 4 3 2 1 0
0 Density Code
1 (MSB)
Number of Blocks (0)
3 (LSB)
4 Reserved (0)
5 (MSB)
Block Length [0 or 800h]
7 (LSB)
Density Code This specifies the format of the media loaded in the drive. See “REPORT DENSITY
SUPPORT 44h” on page 137 for details.
Block Length This indicates the size of fixed blocks for fixed mode Read and Write commands. It is
also used in the decision process on whether to report an illegal length record on reads.
00h The default value when the drive is in normal tape drive mode.
800h The tape drive is in CD-ROM emulation mode for OBDR.
7 6 5 4 3 2 1 0
0 PS (0) Rsvd (0) Page Code {01h}
1 Additional Page Length {0Ah}
2 Reserved (0) TB (0) Res (0) EER (1) PER [0] DTE (0) DCR (0)
3 Read Retry Count
4–7 Reserved (0)
8 Write Retry Count
9–11 Reserved (0)
TB Transfer Block
0 Always set to 0, meaning that an unrecoverable data block will not be
transferred to the host.
EER Enable Early Recovery
1 The drive should attempt error correction before performing retries.
