[Bug-tar] tar 1.23 --no-check-device not working on automounted NFS file systems

[peter.chiu]

Hello,

 

I wonder if anyone can shed some lights on this.

 

I am using automounter to mount a few file systems from a Suse 9.3 to a Red Hat 5.3 box.

 

I then use tar to perform full and incremental backups, but the incrementals always turn out to be full backups.

Below are the details.   I shall be grateful if someone can tell me what I have missed out to cause this.

 

File system: /misc/solar_sohos1

 

address@hidden tmp]# ls /misc/solar_sohos1

cds  config  eofcs  mirror  quota.group  quota.user  scripts  SOHO  solarsoft  tmp  xrp  Y2K

 

address@hidden tmp]# df -h /misc/solar_sohos1

Filesystem            Size  Used Avail Use% Mounted on

solar:/sohos1          31G   16G   15G  52% /misc/solar_sohos1

 

address@hidden tmp]# ls -ls /misc/solar_sohos1

total 41

 0 drwxr-xr-x  5 master cds        160 Apr 25  1997 cds

 0 drwxr-xr-x 14 master EGSE_GRP   400 Sep 12  1997 config

 0 drwxr-xr-x  4 master cds        232 Jul 21  2009 eofcs

 1 drwx------  8 master EGSE_GRP  1040 Jul  3  1997 mirror

 8 -rw-r-----  1 root   games     8192 Dec 14  1999 quota.group

32 -rw-r-----  1 root   games    32768 Dec 17  1999 quota.user

 0 drwxr-xr-x  2 root   root        48 Apr  6  1995 scripts

 0 drwxr-xr-x 11 master EGSE_GRP   384 Apr 25  1997 SOHO

 0 drwxr-xr-x  4 master cds         96 May  8  1997 solarsoft

 0 drwxr-xr-x  2 master EGSE_GRP    48 Apr 22  2004 tmp

 0 drwxr-xr-x  2    286      115    48 Jan 12  1995 xrp

 0 drwxr-xr-x  5 master EGSE_GRP   184 Mar 14  2000 Y2K

 

Basically no recent change in the file system.

 

I used this command to backup the file system to tape:

tar  --one-file-system  -g /csupport/backup/solar-solar_sohos1.snar  -cpvf /dev/nst1  -b 1024 --no-check-device --directory /misc/solar_sohos1 .

 

But repeating the command will backup a full 16GB of data to tape again.

 

I did try to change the destination to disk under /tmp, but get the same result.

tar  --one-file-system  -g /csupport/backup/solar-solar_sohos1.snar  -cpvf /tmp/sohos1/sohos1.tar  -b 1024 --no-check-device --directory /misc/solar_sohos1 .

 

address@hidden tmp]# less solar-solar_sohos1.snar

"solar-solar_sohos1.snar" may be a binary file.  See it anyway?

GNU tar-1.23-2

address@hidden@address@hidden@address@hidden@address@hidden/eofcs/lrg_data/address@hidden@address@hidden@address@hidden@86

address@hidden@address@hidden@./cds/data/chianti_1.01/address@hidden@Yarnaud_rothenflug.i

 

Any idea what is happening here?

 

Regards,

 

Peter Chiu

 

STFC Rutherford Appleton Laboratory

Space Science & Technology Department

Building R25, Room 2.02

Chilton

Didcot

OXON

OX11 0QX

 

Phone:  01235-446699

Fax:      01235-445848

Email:   address@hidden

 

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