muliple volume spanning with gnutar -M

muliple volume spanning with gnutar -M

Post by Gerald Wildgrube » Fri, 15 Sep 1995 04:00:00



Hello,

Every time i'm trying to use the multiple volume spanning option -M  of GNU tar (version 1.11.2) on my NeXTStep 3.3 for Intel Processors machine, either in writing such volumes or in reading volumes written on another computer, i meet the  following problem:

after having given a command such as:

gnutar cMvf /dev/rfd0b "files"

to write the data stream on a diskette as a raw device, the programm starts working properly, filling the diskette, but with continuous messages in /usr/adm/messages:

Sep 13 20:01:38 ue801be mach: fd0: Sector 760 cmd = Write; DMA Over/underrun: RETRYING
(etc...)

After about fifty times repeating this warning, the programm exits with:

gnutar: can't write to /dev/rfd0b : Invalid argument

Same thing when trying to read an archive from a diskette via the raw device; in /usr/adm/messages:

Sep 13 20:26:52 ue801be mach: fd0: Sector 1180 cmd = Read; DMA Over/underrun: RETRYING

the programm starts reading back onto the hard drive, exiting then with the mentioned message:

gnutar: read error on /dev/rfd0b : Invalid argument
gnutar: Too many errors, quitting.

Does someone know what the DMA Over/underrun messages mean in relation to the gnutar utility? I'm not sure if this is a NeXT specific problem or if i made mistakes with the gnutar options.

Any help would be appreciated.

Gerald.

 
 
 

1. multiple volume spanning with gnutar -M

Hello,

Every time i'm trying to use the multiple volume spanning option -M  of GNU tar (version 1.11.2) on my NeXTStep 3.3 for Intel Processors machine, either in writing such volumes or in reading volumes written on another computer, i meet the  following problem:

after having given a command such as:

gnutar cMvf /dev/rfd0b "files"

to write the data stream on a diskette as a raw device, the programm starts working properly, filling the diskette, but with continuous messages in /usr/adm/messages:

Sep 13 20:01:38 ue801be mach: fd0: Sector 760 cmd = Write; DMA Over/underrun: RETRYING
(etc...)

After about fifty times repeating this warning, the programm exits with:

gnutar: can't write to /dev/rfd0b : Invalid argument

Same thing when trying to read an archive from a diskette via the raw device; in /usr/adm/messages:

Sep 13 20:26:52 ue801be mach: fd0: Sector 1180 cmd = Read; DMA Over/underrun: RETRYING

the programm starts reading back onto the hard drive, exiting then with the mentioned message:

gnutar: read error on /dev/rfd0b : Invalid argument
gnutar: Too many errors, quitting.

Does someone know what the DMA Over/underrun messages mean in relation to the gnutar utility? I'm not sure if this is a NeXT specific problem or if i made mistakes with the gnutar options.

Any help would be appreciated.

Gerald.

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