Date: Wed, 2 Jul 1997 22:04:10 -0700 (PDT) From: asami@cs.berkeley.edu (Satoshi Asami) To: current@freebsd.org Subject: unreadable files on photo CD Message-ID: <199707030504.WAA00942@silvia.HIP.Berkeley.EDU>
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Hi folks,
We've been working on a huge number (like 800) of CDs that hold many
images. There are about 100 images per CD. The pictures are in
"photo CD" format (by the way, does anyone know if there is a free
tool to view them?...I know only of Adobe PhotoShop and PhotoDeluxe).
Each file is about 4 to 5 megabytes.
However, there are about a dozen CDs that we can't read all the images
off. For instance:
===
## ls -sa /cdrom/photo_cd/images/
total 166304
4 . 4954 img0012.pcd 4632 img0025.pcd
2 .. 4908 img0013.pcd 4666 img0026.pcd
4714 img0001.pcd 4916 img0014.pcd 4444 img0027.pcd
4724 img0002.pcd 4834 img0015.pcd 4694 img0028.pcd
4796 img0003.pcd 4760 img0016.pcd 4582 img0029.pcd
4980 img0004.pcd 4750 img0017.pcd 4606 img0030.pcd
5182 img0005.pcd 4822 img0018.pcd 4558 img0031.pcd
5520 img0006.pcd 4492 img0019.pcd 4516 img0032.pcd
4880 img0007.pcd 4426 img0020.pcd 4516 img0033.pcd
4648 img0008.pcd 4524 img0021.pcd 4502 img0034.pcd
5248 img0009.pcd 4406 img0022.pcd 4594 img0035.pcd
5266 img0010.pcd 4456 img0023.pcd
5192 img0011.pcd 4590 img0024.pcd
===
There is supposed to be 101 images on this CD. Win95 can read them
all (duh). Looking at the directory:
===
## od -c /cdrom/photo_cd/images
0000000 0 \0 032 \0 \0 \0 \0 \0 \0 032 \0 020 \0 \0 \0 \0
0000020 020 \0 ` \f 027 021 . 033 340 002 \0 \0 001 \0 \0 001
0000040 001 \0 \0 \0 \0 \0 215 U X A \0 \0 \0 \0 \0 \0
0000060 0 \0 030 \0 \0 \0 \0 \0 \0 030 \0 \b \0 \0 \0 \0
0000100 \b \0 ` \f 027 021 . 033 340 002 \0 \0 001 \0 \0 001
0000120 001 001 \0 \0 \0 \0 215 U X A \0 \0 \0 \0 \0 \0
0000140 J \0 j 002 \0 \0 \0 \0 002 j \0 250 I \0 \0 I
0000160 250 \0 ` \f 027 021 . 033 340 \0 \0 \0 001 \0 \0 001
0000200 \r I M G 0 0 0 1 . P C D ; 1 \0 \0
0000220 \0 \0 \t 021 X A 006 \0 \0 \0 \0 \0 A A 016 002
:
0005060 C D ; 1 \0 \0 \0 \0 \t 021 X A 006 \0 \0 \0
0005100 \0 \0 A A 016 002 P C D I P C D v \0 \0
0005120 J \0 V H 001 \0 \0 001 H V \0 310 G \0 \0 G
0005140 310 \0 ` \f 027 021 . 033 340 \0 \0 \0 001 \0 \0 001
0005160 \r I M G 0 0 3 5 . P C D ; 1 \0 \0
0005200 \0 \0 \t 021 X A 006 \0 \0 \0 \0 \0 A A 016 002
0005220 P C D I P C D v \0 \0 \0 \0 \0 \0 \0 \0
0005240 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0
*
0010000
===
It seems the second half of the directory appears to be all zero to
FreeBSD.
This is on 2.2-stable (from about a day ago). The SCSI adapters I
tried are Adaptec 2940UW and a no-name NCR 53c825. The CD-ROM drives
are Toshiba XM-3801TA and XM-5301TA.
Does anyone know what could be the problem?
Satoshi
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