20 May
2021
20 May
'21
1:49 p.m.
On 20/05/2021 21:11, John-Paul Stewart via cctalk wrote:
Setting ufstype=sun will indeed work for loopback mounting Ultrix CD images.
With physical CDs, the Linux CD-ROM driver expects the filesystem to use
2048 byte blocks but the UFS CDs have 512 byte blocks. So you'll also
have to add "loop" to the options:
sudo mount -t ufs -o ro,ufstype=sun,loop /dev/sr1 /tmp/mount
That will mount the physical CD using a loopback device so you can
access the 512 byte per block filesystem. (FWIW, I learned that trick
with IRIX EFS CDs, which have the same problem.)
We have a winner:
$ ls /tmp/mount/decw_book/
bookbrowser????????????? d3b0aa70.decw_book d3knaa23.decw_book??????
d3s1aa97.decw_book d5e5aaa8.decw_book?????? dh87zaa1.decw_bookshelf
dt59aaa8.decw_book
BRM410?????????????????? d3b0aa71.decw_book d3knaa24.decw_book??????
d3s1aaa1.decw_book d5e5aaa9.decw_book?????? dhqdaa11.decw_book
dt59aaa9.decw_book
BRV410?????????????????? d3b0aa72.decw_book d3knaa25.decw_book??????
d3s1aaa2.decw_book d5e5zaa2.decw_bookshelf? dhu3aaa3.decw_book
dt59zaa1.decw_bookshelf
d296aaa1.decw_book?????? d3b0aa73.decw_book d3knaa26.decw_book??????
d3s1aaa3.decw_book d8dlaaa1.decw_book?????? dhu3aaa4.decw_book
dt59zaa2.decw_bookshelf
d296aaa2.decw_book?????? d3b0aaa1.decw_book d3knaa27.decw_book??????
d3s1aaa4.decw_book d8dlaaa6.decw_book?????? dhu3zaa2.decw_bookshelf
dt59zaa3.decw_bookshelf
...
Great, thanks for that. I would probably have never guessed that I
needed loop.
Antonio
--
Antonio Carlini
antonio at acarlini.com