1dda(7D)                             Devices                            dda(7D)
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NAME

6       dda - MMS disk archiving driver
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SYNOPSIS

9       /devices/pseudo/dda@lun:bn
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DESCRIPTION

13       The Media Management System (MMS) is a distributed removable media man‐
14       agement system based on the IEEE 1244 Media Management System  specifi‐
15       cation.  MMS provides a uniform and consistent tape interface to client
16       applications.
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19       The dda driver is a pseudo tape drive with filesystem file  media.  The
20       dda  driver  is  a minimal emulation of the st(7D) tape driver mtio(7I)
21       interface with BSD no-rewind behavior and is used for MMS disk  archiv‐
22       ing. The dda driver should be used with a MMS MMP mount command handle.
23       You configure DDA tapes, drives, and libraries for disk archiving using
24       the  mmsadm(1M)  command.  You also use mmsadm(1M) to mount and unmount
25       dda media.
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CONFIGURATION

28       To set the number of disk archiving tape drives available for MMS  disk
29       archiving,   edit  the  /kernel/drv/dda.conf  configuration  file.  The
30       default number of disk archiving tape drives is 20.
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33       The disk archiving tape drive devlinks  are  located  in  the  /dev/dda
34       directory.
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37       The DDA maximum block size is 262144 bytes and the minimum is 1 byte.
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FILES

40       /kernel/drv/dda            32-bit kernel module (x86)
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43       /kernel/drv/sparcv9/dda    64-bit kernel module (SPARC)
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46       /kernel/drv/amd64/dda      64-bit kernel module (x86)
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49       /kernel/drv/dda.conf       dda configuration file
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ATTRIBUTES

53       See attributes(5) for a description of the following attributes:
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58       ┌────────────────────┬─────────────────────────────────────────────────────────┐
59       │  ATTRIBUTE TYPE    │                     ATTRIBUTE VALUE                     │
60       ├────────────────────┼─────────────────────────────────────────────────────────┤
61       │Architecture        │ SPARC, x86                                              │
62       ├────────────────────┼─────────────────────────────────────────────────────────┤
63       │Availability        │ SUNWmmsr                                                │
64       ├────────────────────┼─────────────────────────────────────────────────────────┤
65       │Interface Stability │ Uncommitted                                             │
66       └────────────────────┴─────────────────────────────────────────────────────────┘
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SEE ALSO

69       mt(1), mmsadm(1M), attributes(5), dmd(7D), st(7D), mtio(7I)
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72       IEEE 1244 Removable Media Standards Specification — IEEE, 2000
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76SunOS 5.11                        17 Oct 2008                          dda(7D)
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