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Operating Systems
Linux
Ubuntu
Request function in block driver
Post 302530109 by coeteam on Monday 13th of June 2011 02:22:29 AM
06-13-2011
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LEARN ABOUT OPENSOLARIS
dda
dda(7D) Devices dda(7D) NAME
dda - MMS disk archiving driver SYNOPSIS
/devices/pseudo/dda@lun:bn DESCRIPTION
The Media Management System (MMS) is a distributed removable media management system based on the IEEE 1244 Media Management System speci- fication. MMS provides a uniform and consistent tape interface to client applications. The dda driver is a pseudo tape drive with filesystem file media. The dda driver is a minimal emulation of the st(7D) tape driver mtio(7I) interface with BSD no-rewind behavior and is used for MMS disk archiving. The dda driver should be used with a MMS MMP mount command han- dle. You configure DDA tapes, drives, and libraries for disk archiving using the mmsadm(1M) command. You also use mmsadm(1M) to mount and unmount dda media. CONFIGURATION
To set the number of disk archiving tape drives available for MMS disk archiving, edit the /kernel/drv/dda.conf configuration file. The default number of disk archiving tape drives is 20. The disk archiving tape drive devlinks are located in the /dev/dda directory. The DDA maximum block size is 262144 bytes and the minimum is 1 byte. FILES
/kernel/drv/dda 32-bit kernel module (x86) /kernel/drv/sparcv9/dda 64-bit kernel module (SPARC) /kernel/drv/amd64/dda 64-bit kernel module (x86) /kernel/drv/dda.conf dda configuration file ATTRIBUTES
See attributes(5) for a description of the following attributes: +--------------------+---------------------------------------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +--------------------+---------------------------------------------------------+ |Architecture | SPARC, x86 | +--------------------+---------------------------------------------------------+ |Availability | SUNWmmsr | +--------------------+---------------------------------------------------------+ |Interface Stability | Uncommitted | +--------------------+---------------------------------------------------------+ SEE ALSO
mt(1), mmsadm(1M), attributes(5), dmd(7D), st(7D), mtio(7I) IEEE 1244 Removable Media Standards Specification -- IEEE, 2000 SunOS 5.11 17 Oct 2008 dda(7D)