YATES@C.CHEM.UPENN.EDU ("Yates, John H.") (09/05/90)
I am finding Backup strangeness on 8mm Backup's. The following script should
use Backup for /usr /u0 /u1, ... /u7 , rewind the tape and List_tape them all.
I am glad I did this sanity check because some marbles (filesystems) are
missing. (skip the sleep's, I don't think they are necessary and are only
there as a desperate guess).
What happens is, all of the Backups appear to work, but after rewinding
and doing a List_tape, only the 3rd, 6th, and 9th sets appear.
Some sort of header, trailer, tapemark problems with putting multiple Backup's
on one 8mm tape? Anyone know what gives?
Thanks, John
yates@c.chem.upenn.edu
The 8mmbackup script:
echo "Starting 8mmBackup"
df
#
sleep 60
mt -t /dev/rmt/tps0d6nr retension
sleep 60
mt -t /dev/rmt/tps0d6nr rewind
sleep 60
#
echo "Backup /usr"
Backup -t /dev/rmt/tps0d6nr /usr
sleep 60
#
echo "Backup /u0"
Backup -t /dev/rmt/tps0d6nr /u0
sleep 60
#
echo "Backup /u1"
Backup -t /dev/rmt/tps0d6nr /u1
sleep 60
#
echo "Backup /u2"
Backup -t /dev/rmt/tps0d6nr /u2
sleep 60
#
echo "Backup /u3"
Backup -t /dev/rmt/tps0d6nr /u3
sleep 60
#
echo "Backup /u4"
Backup -t /dev/rmt/tps0d6nr /u4
sleep 60
#
echo "Backup /u5"
Backup -t /dev/rmt/tps0d6nr /u5
sleep 60
#
echo "Backup /u6"
Backup -t /dev/rmt/tps0d6nr /u6
sleep 60
#
echo "Backup /u7"
Backup -t /dev/rmt/tps0d6nr /u7
sleep 60
#
echo "Rewind tape."
mt -t /dev/rmt/tps0d6nr rewind
sleep 600
#
echo "List 1st Backup set (/usr)"
List_tape -t /dev/rmt/tps0d6nr
sleep 60
#
echo "List 2nd Backup set (/u0)"
List_tape -t /dev/rmt/tps0d6nr
sleep 60
#
echo "List 3rd Backup set (/u1)"
List_tape -t /dev/rmt/tps0d6nr
sleep 60
#
echo "List 4th Backup set (/u2)"
List_tape -t /dev/rmt/tps0d6nr
sleep 60
#
echo "List 5th Backup set (/u3)"
List_tape -t /dev/rmt/tps0d6nr
sleep 60
#
echo "List 6th Backup set (/u4)"
List_tape -t /dev/rmt/tps0d6nr
sleep 60
#
echo "List 7th Backup set (/u5)"
List_tape -t /dev/rmt/tps0d6nr
sleep 60
#
echo "List 8th Backup set (/u6)"
List_tape -t /dev/rmt/tps0d6nr
sleep 60
#
echo "List 9th Backup set (/u7)"
List_tape -t /dev/rmt/tps0d6nr
sleep 60
#
mt -t /dev/rmt/tps0d6nr rewind
sleep 60
#
df
sleep 600
echo "Done."
The results of running the script (most verboseness removed):
Starting 8mmBackup
Filesystem Type blocks use avail %use Mounted on
/dev/root efs 31584 19127 12457 61% /
/dev/u7 efs 245532 5834 239698 2% /u7
/dev/u6 efs 245532 60 245472 0% /u6
/dev/u5 efs 245532 27 245505 0% /u5
/dev/u4 efs 245532 700 244832 0% /u4
/dev/u3 efs 245532 352 245180 0% /u3
/dev/u2 efs 245532 56677 188855 23% /u2
/dev/u1 efs 245532 90632 154900 37% /u1
/dev/u0 efs 324576 78477 246099 24% /u0
/dev/tmp efs 378672 930 377742 0% /tmp
/dev/scr efs 1965012 549040 1415972 28% /scr
/dev/usr efs 979272 242345 736927 25% /usr
/debug dbg 631656 104496 527160 17% /debug
Backup /usr
Backup started. Please wait...
c 2k of 4k [1] /
c 2k of 6k [1] /usr
c 2k of 8k [1] /usr/lost+found
c 2k of 10k [1] /usr/lib
c 2k of 12k [1] /usr/lib/inst
...
c 2k of 160386k [1] /usr/local/man
c 2k of 160388k [1] /usr/local/man/man1
c 6k of 160394k [1] /usr/local/man/man1/vmsbackup.1
Backup complete.
Backup /u0
Backup started. Please wait...
c 2k of 4k [1] /
c 2k of 6k [1] /u0
c 2k of 8k [1] /u0/lost+found
c 2k of 10k [1] /u0/jy
c 4k of 14k [1] /u0/jy/.profile
c 4k of 18k [1] /u0/jy/.cshrc
c 4k of 22k [1] /u0/jy/.login
...
c 4k of 53832k [1] /u0/ap/temp1.f
c 4k of 53836k [1] /u0/ap/eng1.f
c 362k of 54198k [1] /u0/ap/a.out
Backup complete.
Backup /u1
Backup started. Please wait...
c 2k of 4k [1] /
c 2k of 6k [1] /u1
c 2k of 8k [1] /u1/lost+found
c 2k of 10k [1] /u1/wd
c 4k of 14k [1] /u1/wd/.profile
c 4k of 18k [1] /u1/wd/.cshrc
c 4k of 22k [1] /u1/wd/.login
...
c 112k of 53498k [1] /u1/wd/stuff/transnosym.log;2
c 280k of 53778k [1] /u1/wd/stuff/c3h3nh.log
Backup complete.
Backup /u2
Backup started. Please wait...
c 2k of 4k [1] /
c 2k of 6k [1] /u2
c 2k of 8k [1] /u2/lost+found
c 2k of 10k [1] /u2/voth
c 4k of 14k [1] /u2/voth/.profile
c 4k of 18k [1] /u2/voth/.cshrc
...
c 10k of 33826k [1] /u2/wm/chain.mole/filout.2
c 458k of 34284k [1] /u2/wm/chain.mole/coord
c 368k of 34652k [1] /u2/wm/chain.mole/lc
Backup complete.
Backup /u3
Backup started. Please wait...
c 2k of 4k [1] /
c 2k of 6k [1] /u3
c 2k of 8k [1] /u3/lost+found
c 2k of 10k [1] /u3/smith
c 4k of 14k [1] /u3/smith/.profile
c 4k of 18k [1] /u3/smith/.cshrc
...
c 4k of 320k [1] /u3/gf/.cshrc
c 4k of 324k [1] /u3/gf/.login
Backup complete.
Backup /u4
Backup started. Please wait...
c 2k of 4k [1] /
c 2k of 6k [1] /u4
c 2k of 8k [1] /u4/lost+found
c 2k of 10k [1] /u4/jo
c 4k of 14k [1] /u4/jo/.profile
c 4k of 18k [1] /u4/jo/.cshrc
...
c 4k of 560k [1] /u4/ml/.cshrc
c 4k of 564k [1] /u4/ml/.login
Backup complete.
Backup /u5
Backup started. Please wait...
c 2k of 4k [1] /
c 2k of 6k [1] /u5
c 2k of 8k [1] /u5/lost+found
c 2k of 10k [1] /u5/alex
c 4k of 14k [1] /u5/alex/.profile
c 4k of 18k [1] /u5/alex/.cshrc
c 4k of 22k [1] /u5/alex/.login
Backup complete.
Backup /u6
Backup started. Please wait...
c 2k of 4k [1] /
c 2k of 6k [1] /u6
c 2k of 8k [1] /u6/lost+found
c 2k of 10k [1] /u6/dhb
c 4k of 14k [1] /u6/dhb/.profile
...
c 4k of 66k [1] /u6/mt/.cshrc
c 4k of 70k [1] /u6/mt/.login
Backup complete.
Backup /u7
Backup started. Please wait...
c 2k of 4k [1] /
c 2k of 6k [1] /u7
c 2k of 8k [1] /u7/lost+found
c 2k of 10k [1] /u7/er
c 4k of 14k [1] /u7/er/.profile
c 4k of 18k [1] /u7/er/.cshrc
...
c 4k of 3400k [1] /u7/jl/.login
c 2k of 3402k [1] /u7/jl/.news_time
c 14k of 3416k [1] /u7/jl/q.q
Backup complete.
Rewind tape.
List 1st Backup set (/usr) <---- but it isn't it is
/u1, the 3rd set
Tape listing started. Please wait...
Tape Header
===========
label: Partial Backup
created: Mon Sep 3 23:06:57 1990
device: /dev/rmt/tps0d6nr
user: root
group: sys
system: a.chem a.chem 3.3 06011629 IP7
bru: "SGI Release 1.01"
release: 9.11
variant: 1
Files
=====
drwxr-xr-x 21 root sys 0 Sep 3 22:37 /
drwxr-xr-x 4 root sys 0 Jul 27 16:59 /u1
drwx------ 2 root sys 0 Jul 26 17:18 /u1/lost+found
drwxrwxr-x 6 dailey dailey 0 Aug 26 09:09 /u1/wd
-rw-r--r-- 1 dailey dailey 534 Jul 27 16:59 /u1/wd/.profile
-rw-r--r-- 1 dailey dailey 541 Aug 10 13:43 /u1/wd/.cshrc
...
-rw-r----- 1 dailey dailey 97597 Aug 25 22:50 /u1/wd/stuff/transnosym.log;2
-rw-r----- 1 dailey dailey 248479 Aug 28 15:24 /u1/wd/stuff/c3h3nh.log
Tape listing complete.
List 2nd Backup set (/u0) <--- but it isn't it
is /u4, the 6th
Tape listing started. Please wait... set
Tape Header
===========
label: Partial Backup
created: Mon Sep 3 23:30:41 1990
device: /dev/rmt/tps0d6nr
user: root
group: sys
system: a.chem a.chem 3.3 06011629 IP7
bru: "SGI Release 1.01"
release: 9.11
variant: 1
Files
=====
drwxr-xr-x 21 root sys 0 Sep 3 22:37 /
drwxr-xr-x 11 root sys 0 Aug 28 13:19 /u4
drwx------ 2 root sys 0 Jul 26 17:19 /u4/lost+found
drwxrwxr-x 4 owrutsky hochstra 0 Aug 30 21:14 /u4/jo
-rw-r--r-- 1 owrutsky sys 534 Aug 10 13:06 /u4/jo/.profile
...
-rw-r--r-- 1 lester sys 534 Aug 28 13:20 /u4/ml/.profile
-rw-r--r-- 1 lester sys 478 Aug 28 13:20 /u4/ml/.cshrc
-rw-r--r-- 1 lester sys 476 Aug 28 13:20 /u4/ml/.login
Tape listing complete.
List 3rd Backup set (/u1) <---- but it isn't, it is
/u7, the 9th set
Tape listing started. Please wait...
Tape Header
===========
label: Partial Backup
created: Mon Sep 3 23:34:35 1990
device: /dev/rmt/tps0d6nr
user: root
group: sys
system: a.chem a.chem 3.3 06011629 IP7
bru: "SGI Release 1.01"
release: 9.11
variant: 1
Files
=====
drwxr-xr-x 21 root sys 0 Sep 3 22:37 /
drwxr-xr-x 5 root sys 0 Aug 9 15:20 /u7
drwx------ 2 root sys 0 Jul 26 17:19 /u7/lost+found
drwxrwxr-x 2 rescorla cooperma 0 Aug 24 09:03 /u7/er
-rw-r--r-- 1 rescorla sys 534 Aug 9 15:16 /u7/er/.profile
-rw-r--r-- 1 rescorla sys 478 Aug 9 15:16 /u7/er/.cshrc
...
-rw-r--r-- 1 lalonde sys 476 Aug 9 15:20 /u7/jl/.login
-rw-r--r-- 1 lalonde voet 0 Aug 30 10:38 /u7/jl/.news_time
-rw-r----- 1 lalonde voet 9800 Aug 30 16:40 /u7/jl/q.q
Tape listing complete.
List 4th Backup set (/u2)
(then it just hangs here because /u7 is last partition backed up to tape)clint@sgi.com (Clint Greene) (09/06/90)
In article <9009042005.AA28494@remote.dccs.upenn.edu> YATES@C.CHEM.UPENN.EDU ("Yates, John H.") writes: >I am finding Backup strangeness on 8mm Backup's. The following script should >use Backup for /usr /u0 /u1, ... /u7 , rewind the tape and List_tape them all. >I am glad I did this sanity check because some marbles (filesystems) are >missing. (skip the sleep's, I don't think they are necessary and are only >there as a desperate guess). >What happens is, all of the Backups appear to work, but after rewinding >and doing a List_tape, only the 3rd, 6th, and 9th sets appear. > >Some sort of header, trailer, tapemark problems with putting multiple Backup's >on one 8mm tape? Anyone know what gives? > >Thanks, John >yates@c.chem.upenn.edu > Script and messages deleted If you look at the List_tape script in /usr/sbin you'll see that it is calling bru with the -g option just to verify that the tape is truly in bru format. The problem arises from the fact that you are using the no-rewind device, so after the bru -g, the tape is positioned after teh first block and then they do another bru -g to list the header and then a bru -t get the file contents. Well the bru -g will cough/choke/die on the second issuance because bru itself verifies whether or not the tape is bru format. That is probably why you only see the 3rd, 6th and 9th set of files, while your script says it is the 1st, 2nd and 3rd. If you were to just run bru -tvvvv on this tape 9 times using the no-rewind (tps0d6nr) device you would find all your data there. The problem is not an exabyte or any other tape drive problem. It is a List_tape problem. I filed a bug on it a while back, but I don't know how they will fix it. It really isn't made to handle multiple archive tapes. The 3.3 version has the same problems. Now tar and exabyte under 3.2 did have problems with multiarchive backups. There was a bug in the driver that would not aloow tar to read any archives past the first one on the 8mm tape drive. Tar would appear to write the multiple archives, but would only list the first archives contents, but when asked to read the 2nd or subsequent archives it wold appear to hang when in reality it is reading the tape and runs to the EOT where it gives a read error, but you have to wait a few minutes for it to get there. This I believe is fixed in 3.3 and possibly in 3.2.3. Dave Olson maybe to answer that with some authority.
YATES@C.CHEM.UPENN.EDU ("Yates, John H.") (09/06/90)
I posted that I had a problem with Backup on our 8mm drive. I tried our 9 track and had the same problem. SGI has noted my infoiris message, and will test internally. Meanwhile, I took the advice of a wise netter (sorry, I don't have your name at my fingertips) and used bru directly. The following script worked just fine to my 8mm drive. I consider the problem resolved, I won't use Backup and List_tape. John yates@c.chem.upenn.edu bru8mm: echo "Starting bru 8mmBackup" df ps -el # mt -t /dev/rmt/tps0d6nr retension mt -t /dev/rmt/tps0d6nr rewind # echo "bru Backup /usr" bru -cvf /dev/rmt/tps0d6nr /usr # echo "bru Backup /u0" bru -cvf /dev/rmt/tps0d6nr /u0 # echo "bru Backup /u1" bru -cvf /dev/rmt/tps0d6nr /u1 # echo "bru Backup /u2" bru -cvf /dev/rmt/tps0d6nr /u2 # echo "bru Backup /u3" bru -cvf /dev/rmt/tps0d6nr /u3 # echo "bru Backup /u4" bru -cvf /dev/rmt/tps0d6nr /u4 # echo "bru Backup /u5" bru -cvf /dev/rmt/tps0d6nr /u5 # echo "bru Backup /u6" bru -cvf /dev/rmt/tps0d6nr /u6 # echo "bru Backup /u7" bru -cvf /dev/rmt/tps0d6nr /u7 # echo "Rewind tape." mt -t /dev/rmt/tps0d6nr rewind # echo "List 1st bru backup set (/usr)" bru -tvf /dev/rmt/tps0d6nr # echo "List 2nd bru backup set (/u0)" bru -tvf /dev/rmt/tps0d6nr # echo "List 3rd bru backup set (/u1)" bru -tvf /dev/rmt/tps0d6nr # echo "List 4th bru backup set (/u2)" bru -tvf /dev/rmt/tps0d6nr # echo "List 5th bru backup set (/u3)" bru -tvf /dev/rmt/tps0d6nr # echo "List 6th bru backup set (/u4)" bru -tvf /dev/rmt/tps0d6nr # echo "List 7th bru backup set (/u5)" bru -tvf /dev/rmt/tps0d6nr # echo "List 8th bru backup set (/u6)" bru -tvf /dev/rmt/tps0d6nr # echo "List 9th bru backup set (/u7)" bru -tvf /dev/rmt/tps0d6nr # mt -t /dev/rmt/tps0d6nr rewind # df ps -el echo "Done."