Tape density and mode values

Table 1 and Table 2 show the density and mode values that are available.

Table 1. Density⁄mode values for tapes that are not 7-track

Tape Mode (mm)

3480 / 3490 Cartridge Tapes

08
28
00 or BU
20 or IM

Compaction (IDRC), buffered write mode
Compaction (IDRC), immediate write mode
No compaction, buffered write mode
No compaction, immediate write mode

Tape Mode (mm)

3400 Tapes

C8 *
C0 *
D0 *

 800 bpi, dual density
1600 bpi, dual density
6250 bpi, dual density

Tape Mode (mm)

3424 / 9348 Tapes

42 *
62 *
C2 * , 00 or BU
E2 * , 20 or IM

1600 bpi, buffered write mode
1600 bpi, immediate write mode
6250 bpi, buffered write mode
6250 bpi, immediate write mode

Tape Mode (mm)

9346 / 9347 Streamer Tapes

50 or LL
60 or LS
90 or HL
30 or HS

IBM 9347, low speed, long gap
IBM 9347, low speed, short gap
IBM 9347, high speed, long gap
IBM 9347, high speed, short gap

00 to FE

IBM 9346, forced streaming mode

Table 2. Tape conversion mode values for 7-track tapes

Tape Mode (mm)

Density (bpi)

Parity

Translation

Conversion

10 *
20 *
28 *
30 *
38 *

200

Odd
Even
Even
Odd
Odd

Off
Off
On
Off
On

On
Off
Off
Off
Off

50 *
60 *
68 *
70 *
78 *

556

Odd
Even
Even
Odd
Odd

Off
Off
On
Off
On

On
Off
Off
Off
Off

90 *
A0 *
A8 *
B0 *
B8 *

800

Odd
Even
Even
Odd
Odd

Off
Off
On
Off
On

On
Off
Off
Off
Off

Note:
  1. For mm values marked with an asterisk (*), the tape must be positioned at the load point.
  2. If the mm value is omitted, the system default is used.