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Full Discussion: tar backup problems
Top Forums UNIX for Dummies Questions & Answers tar backup problems Post 30807 by Perderabo on Monday 28th of October 2002 09:25:13 AM
Old 10-28-2002
It would really help if you would tell us what os and system that you are using. But it looks like you are using SunOS. On SunOS, /dev/fd/x is a psuedo filesystem. Use "man -s4 fd" for info. The floppy driver is called fd, but the devices are called stuff like "/dev/diskette".

You will never succeed in backing up /dev/fd on a sun. You're just causing tar to effectively dup its own file descriptors.
 

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mkdevmaps(1M)						  System Administration Commands					     mkdevmaps(1M)

NAME
mkdevmaps - make device_maps entries SYNOPSIS
/usr/sbin/mkdevmaps DESCRIPTION
The mkdevmaps command writes to standard out a set of device_maps(4) entries describing the system's frame buffer, audio, and removable media devices. The mkdevmaps command is used by the init.d(4) scripts to create or update the /etc/security/device_maps file. Entries are generated based on the device special files found in /dev. For the different categories of devices, the mkdevmaps command checks for the following files under /dev: audio /dev/audio, /dev/audioctl, /dev/sound/... tape /dev/rst*, /dev/nrst*, /dev/rmt/... floppy /dev/diskette, /dev/fd*, /dev/rdiskette, /dev/rfd* removable disk /dev/dsk/c0t?d0s?, /dev/rdsk/c0t?d0s? frame buffer /dev/fb ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ |Interface Stability |Obsolete | +-----------------------------+-----------------------------+ SEE ALSO
allocate(1), bsmconv(1M), attributes(5) NOTES
mkdevmaps might not be supported in a future release of the Solaris operating system. SunOS 5.10 8 Oct 2003 mkdevmaps(1M)
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