shair@ux1.cso.uiuc.edu (Bob Shair) (08/08/90)
The IBM Support Center gave the U of Illinois the following
instructions for copying a stacked tape:
1. Change the tape device to the correct blocking:
chdev -l rmt0 -a block_size=512
(this made the tape readable for them, and may be all you
need)
2. Copy all of the images from tape to hard disk:
a. Boot image ~2294880 Bytes
dd if=/dev/rmt0.5 of=BOSBOOT bs=512 conv=sync
b. install programs ~1382400 Bytes
dd if=/dev/rmt0.5 of=INSTALL bs=512 conv=sync
c. Table of Contents (variable size depending on number of lpp's)
dd if=/dev/rmt0.5 of=TOC bs=512 conv=sync
d. Base Operating System ~20480000 Bytes
dd if=/dev/rmt0.5 of=BOS.OBJ bs=512 conv=sync
e. Message and locale catalogs ~3737600 Bytes
dd if=/dev/rmt0.5 of=MESSAGES bs=512 conv=sync
f. Repeat step e for all other lpp's to be copied...
3. copy images to second tape:
dd if=TAPEBOOT of=/dev/rmt0.5 bs=512 conv=sync
et cetera
******WARNING ***********
IMPORTANT -- IMPORTANT
The copies must have ALL images on them even if you only plan
to use the copied tape to boot the system and then install
from non-stacked tapes or over the network.
***************************
--
Bob Shair shair@vmd.cso.uiuc.edu
Scientific Computing Specialist SHAIR@UIUCVMD (bitnet)
IBM Champaignkarish@mindcrf.UUCP (08/08/90)
In article <1990Aug7.172615.19203@ux1.cso.uiuc.edu> shair@ux1.cso.uiuc.edu (Bob Shair) writes: >The IBM Support Center gave the U of Illinois the following >instructions for copying a stacked tape: > >1. Change the tape device to the correct blocking: > chdev -l rmt0 -a block_size=512 ^^^ 0 (variable block size) may be a better choice here. One of the problems we had here with the 9021 upgrade was that the default block size for our 1/2" tape drive was 1024. The drive wouldn't read existing tapes correctly until I changed this to 0. -- Chuck Karish karish@mindcraft.com Mindcraft, Inc. (415) 323-9000