helpGNU tar - Support: sr #105671, Leave tape in same state after...


sr #105671: Leave tape in same state after --verify write as after regular write

Submitted by:  Andrew Klaassen <clawsoon>
Submitted on:  Wed 15 Nov 2006 07:03:23 PM UTC  
Category:  None Priority:  5 - Normal
Severity:  1 - Wish Status:  None
Privacy:  Public Assigned to:  None
Open/Closed:  Open Operating System:  GNU/Linux

Add a New Comment (Rich Markup)

You are not logged in

Please log in, so followups can be emailed to you.


Wed 15 Nov 2006 07:03:23 PM UTC, original submission:  

The command 'tar cf' on a no-rewind tape device leaves the tape at a position appropriate to immediately execute another 'tar cf'.

The command 'tar cWf' on a no-rewind tape device, in contrast, requires that the command 'mt fsf 1' be executed before another 'tar cWf' comand is executed, else the file mark gets overwritten.

The following patch makes the behaviour of the two commands (with and without --verify) the same, at least on my Fedora Core 6 system:

--- src/compare.c.orig  2006-11-15 13:24:30.000000000 -0500
+++ src/compare.c       2006-11-15 13:56:40.000000000 -0500
@@ -589,6 +589,16 @@
       xheader_destroy (&extended_header);

+#ifdef MTIOCTOP
+  {
+    struct mtop operation;
+    int status;
+    operation.mt_op = MTFSF;
+    operation.mt_count = 1;
+    status = rmtioctl (archive, MTIOCTOP, (char *) &operation);
+  }
   access_mode = ACCESS_WRITE;
   now_verifying = 0;

Andrew Klaassen <clawsoon>


(Note: upload size limit is set to 16384 kB, after insertion of the required escape characters.)

Attach Files:

No files currently attached


Depends on the following items: None found

Items that depend on this one: None found


CC list is empty


Do you think this task is very important?
If so, you can add your encouragement to it.
This task has 0 encouragements so far.

Only logged-in users can vote.




Follows 1 latest change.

Date Changed by Updated Field Previous Value => Replaced by
2006-11-15 clawsoon Carbon-Copy- => Added clawsoon

Back to the top

Powered by Savane 3.5