******************************************
     General DVD info for Linux machines

mount /dvdrom  to read DVD's on crush
mount /dvdr    on graphics2, e.g.
eject /dvdr -1 or -2 to eject DVD in drive 1 or 2 on a two drive system

backup_local.com: Will backup images to DVD, but is maybe more useful
                  for coping processed data to CDROM.
                  Check James's notes to see how.

verify.com:    Checks DVD'S against disk files

sumarize.com:  Reports DVD contents

***********************************************************************
*************************  How To Make a Copy of a DVD  ***************

1)  Put the DVD to be copied in a crush machine, e.g.
    then rsh to machine:

mcfuser@graphics3:/home/mcfuser 1% rsh crush1
Last login: Sat Aug 30 17:01:56 from server.bl831.als.lbl.gov
You have mail.

2) mount the DVD:  Warning: on some machines "/dvdrom/" is "/dvdr/"

mcfuser@crush01:/home/mcfuser 2% mount /dvdrom

3) check that it is now mounted with "df":

mcfuser@crush01:/home/mcfuser 3% df
Filesystem           1k-blocks      Used Available Use% Mounted on
/dev/hda2              4636304   3472276    928512  79% /
/dev/hda1                99043     15104     78825  17% /boot
/dev/hda12            18326816  12116292   5279564  70% /local
none                   1032496         0   1032496   0% /dev/shm
server:/data         670552972 169036524 467985584  27% /data
graphics3:/data4     831133576 573241384 215672988  73% /data4
server:/data2        604756600 212275560 361761144  37% /data2
tmpfs                  1032496         0   1032496   0% /tmp/ram
/dev/cdrom             2804800   2804800         0 100% /dvdrom

4)use summarize.com to see what's on the DVD:

mcfuser@crush01:/home/mcfuser 4% summarize.com /dvdrom/
/dvdrom/data/mcfuser/alber/sibyl/trf1_er3/trf1_er_14_###.img 1-28
/dvdrom/data/mcfuser/alber/sibyl/trf1_er3/trf1_er_13_###.img 1-210
/dvdrom/data/mcfuser/alber/sibyl/trf1_er3/trf1_er_0_###.img 29-54
/dvdrom/data/mcfuser/alber/sibyl/trf1_er3/trf1_er_12_###.img 1-30
/dvdrom/data/mcfuser/tsai/MAT_test_0_###.img 1-5
/dvdrom/data/mcfuser/tsai/MX_test_0_###.img 6-9

5a) to restore every thing on the DVD:  

mcfuser@crush01:/home/mcfuser 5% tar cCf /dvdrom/ - . | rsh server "cd /data2/mcfuser/restore ; tar xvf -"

5b) otherwise determine what you want restored, e.g. sibyl's files, then replace the "." with "data/mcfuser/alber/sibyl":

mcfuser@crush01:/home/mcfuser 5% tar cCf /dvdrom/ - data/mcfuser/alber/sibyl | rsh server "cd /data2/mcfuser/restore ; tar xvf -"

6) NOW, To Write the new DVD, first rsh to server:

mcfuser@crush01:/home/mcfuser 6% rsh server
Last login: Thu Aug 30 10:19:00 from graphics2.bl831.als.lbl.gov
DO NOT RUN JOBS ON THE FILE SERVER
they will be killed without warning or explanation.
please rsh crush first
mcfuser@bl831:/home/mcfuser 1%

7)  "cd" to the "restore directory:

mcfuser@bl831:/home/mcfuser 1% cd /data2/mcfuser/restore/

8) now issue the rimage_backup.com command for the desired user's files:

mcfuser@bl831:/home/mcfuser 2% backup_rimage.com -note "User Copy"./data/mcfuser/alber/sibyl/
*****************************************************************************
*****************************************************************************
        Restore ALL Data from a DVD to the server 
       (BEWARE: data on the server will be over-written!)

cd /dvdrom
tar cf - . | ( cd / ; tar xvf - )
******************************************************************************
                      Trouble with DVD writer on graphics3

If DVD writes fail on graphics3, a common problem is the DMA setting on the
DVD drive.  I don't know how, but it keeps getting reset to "on".  DVD
writes will not work with the DMA turned "on", you have to turn it off:

ssh root@graphics3
root's password:
Authentication successful.
Last login: Mon Jul 07 2003 22:56:00 -0700 from server.bl831.als.lbl.gov
You have new mail.
[root@graphics3 ~]# hdparm /dev/hda

/dev/hda:
HDIO_GET_MULTCOUNT failed: Input/output error
I/O support  =  0 (default 16-bit)
unmaskirq    =  0 (off)
using_dma    =  1 (on)
keepsettings =  0 (off)
HDIO_GET_NOWERR failed: Input/output error
readonly     =  0 (off)
BLKRAGET failed: Input/output error
HDIO_GETGEO failed: Invalid argument
busstate     =  1 (on)
[root@graphics3 ~]# hdparm -d0 /dev/hda

/dev/hda:
setting using_dma to 0 (off)
using_dma    =  0 (off)

-James