Need Help, having problems checking the downloaded iso and burning to dvd

[thriftee]

I'm sorry, I have tried editing this twice to make in more readable with lines between, but it won't save the lines. I am writing this from the knoppix system, but it makes no sense to me that it won't display this as I typed or pasted it.

I have downloaded files before and made bootable OS dvd's before. I am no linux guru, but am computer capable at least to some degree. My problems are that

1. md5sum hangs when trying to test the downloaded iso.
2. cdrecord gets errors trying to write to the DVD
3. the md5sum value of the DVD doesn't match the value in the downloaded .md5 file

Could someone please tell me how to do this correctly? I used bittorrent to download the 7.20 iso, and it seemed to work both seamlessly and properly. If i cd to the directory, every thing I'd expect is there.

knoppix@Microknoppix:~/Downloads/KNOPPIX_V7.2.0DVD-2013-06-16-EN$ ls -l total 4019646 -rw-r--r-- 1 knoppix knoppix 4111474688 Aug 22 11:40 KNOPPIX_V7.2.0DVD-2013-06-16-EN.iso -rw-r--r-- 1 knoppix knoppix 70 Aug 22 09:54 KNOPPIX_V7.2.0DVD-2013-06-16-EN.iso.md5 -rw-r--r-- 1 knoppix knoppix 315 Aug 22 09:54 KNOPPIX_V7.2.0DVD-2013-06-16-EN.iso.md5.asc -rw-r--r-- 1 knoppix knoppix 78 Aug 22 09:54 KNOPPIX_V7.2.0DVD-2013-06-16-EN.iso.sha1 -rw-r--r-- 1 knoppix knoppix 323 Aug 22 09:54 KNOPPIX_V7.2.0DVD-2013-06-16-EN.iso.sha1.asc -rw-r--r-- 1 knoppix knoppix 595167 Aug 22 09:55 dpkg-l-dvd-720.txt -rw-r--r-- 1 knoppix knoppix 9928 Aug 22 09:54 knoppix-cheatcodes.txt

But when I try to check the downloaded file to see if its correct, the command hangs. I tried letting it run for 20 min, but it never completed and I needed to ctrl-c out of it, so I'm not absolutely sure the downloaded file is correct.

knoppix@Microknoppix:~/Downloads/KNOPPIX_V7.2.0DVD-2013-06-16-EN$ md5sum -c KNOPPIX_V7.2.0DVD-2013-06-16-EN.iso.md5 ^C

So I decide to try writing it to the DVD anyway, but I get errors. I then try to run an md5sum on the DVD and compare it to the .md5 file and they are different

knoppix@Microknoppix:~/Downloads/KNOPPIX_V7.2.0DVD-2013-06-16-EN$ cdrecord -v dev=/dev/dvd KNOPPIX_V7.2.0DVD-2013-06-16-EN.iso wodim: No write mode specified. wodim: Assuming -tao mode. wodim: Future versions of wodim may have different drive dependent defaults. TOC Type: 1 = CD-ROM wodim: Operation not permitted. Warning: Cannot raise RLIMIT_MEMLOCK limits. scsidev: '/dev/dvd' devname: '/dev/dvd' scsibus: -2 target: -2 lun: -2 Linux sg driver version: 3.5.27 Wodim version: 1.1.10 SCSI buffer size: 64512 Device type : Removable CD-ROM Version : 5 Response Format: 2 Capabilities : Vendor_info : 'MATSHITA' Identification : 'DVD-RAM UJ-850S ' Revision : '1.05' Device seems to be: Generic mmc2 DVD-R/DVD-RW. Current: 0x0011 (DVD-R sequential recording) Profile: 0x0012 (DVD-RAM) Profile: 0x002B (DVD+R/DL) Profile: 0x001B (DVD+R) Profile: 0x001A (DVD+RW) Profile: 0x0016 (DVD-R/DL layer jump recording) Profile: 0x0015 (DVD-R/DL sequential recording) Profile: 0x0013 (DVD-RW restricted overwrite) Profile: 0x0014 (DVD-RW sequential recording) Profile: 0x0011 (DVD-R sequential recording) (current) Profile: 0x0010 (DVD-ROM) Profile: 0x000A (CD-RW) Profile: 0x0009 (CD-R) Profile: 0x0008 (CD-ROM) Profile: 0x0002 (Removable disk) Using generic SCSI-3/mmc DVD-R(W) driver (mmc_mdvd). Driver flags : SWABAUDIO BURNFREE Supported modes: PACKET SAO Drive buf size : 1605632 = 1568 KB Beginning DMA speed test. Set CDR_NODMATEST environment variable if device communication breaks or freezes immediately after that. FIFO size : 12582912 = 12288 KB Track 01: data 3921 MB Total size: 4503 MB (446:07.41) = 2007556 sectors Lout start: 4503 MB (446:09/31) = 2007556 sectors Current Secsize: 2048 HINT: use dvd+rw-mediainfo from dvd+rw-tools for information extraction. Blocks total: 2298496 Blocks current: 2298496 Blocks remaining: 290940 Speed set to 11080 KB/s Starting to write CD/DVD at speed 8.0 in real unknown mode for single session. Last chance to quit, starting real write in 0 seconds. Operation starts. Waiting for reader process to fill input buffer ... input buffer ready. Performing OPC... Starting new track at sector: 0 Track 01: 2359 of 3921 MB written (fifo 0%) [buf 99%] 3.3x.Errno: 5 (Input/output error), write_g1 scsi sendcmd: no error CDB: 2A 00 00 12 6E 0E 00 00 1F 00 status: 0x2 (CHECK CONDITION) Sense Bytes: F1 00 04 00 12 6B 00 0A 00 31 80 11 09 02 00 00 Sense Key: 0x4 Hardware Error, deferred error, Segment 0 Sense Code: 0x09 Qual 0x02 (focus servo failure) Fru 0x0 Sense flags: Blk 1207040 (valid) cmd finished after 15.959s timeout 40s write track data: error after 2473619456 bytes wodim: A write error occured. wodim: Please properly read the error message above. Writing time: 730.747s Average write speed 4.2x. Min drive buffer fill was 4% Total of 33 possible drive buffer underruns predicted. Fixating... Fixating time: 6.610s wodim: fifo had 39154 puts and 38963 gets. wodim: fifo was 4340 times empty and 2146 times full, min fill was 0%.

knoppix@Microknoppix:~/Downloads/KNOPPIX_V7.2.0DVD-2013-06-16-EN$ md5sum /dev/sr0 d41d8cd98f00b204e9800998ecf8427e /dev/sr0

knoppix@Microknoppix:~/Downloads/KNOPPIX_V7.2.0DVD-2013-06-16-EN$ cat KNOPPIX_V7.2.0DVD-2013-06-16-EN.iso.md5 836d36f87624c930a8ee375ca5492d69 *KNOPPIX_V7.2.0DVD-2013-06-16-EN.iso


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wps

[thriftee]

PS: The system I'm running is fresh install of Knoppix 6..2.1 installed from a DVD I burned a couple years ago, and installed to the HD on an HP DV9000 Laptop with 2 gb of memory and 120 gb of disk partitioned automatically by the Knoppix install. There were no problems during the install, and nothing changed on the system after the install.

[Werner P. Schulz]

1. md5sum hangs when trying to test the downloaded iso.

Check with md5sum uses only about 2 minutes for DVD download. Perhaps your hardware causes the problem. Try first memtest86+ for about 8 - 12 hours.

[thriftee]

I ran 3 passes of memtest86 that comes on the knoppix dvd without any errors. I don't believe there are any hardware problems.


Do you have any other suggestions?


thanks

[Werner P. Schulz]

To believe is not to know.

[thriftee]

There is ALWAYS a possibility of hardware problems, but I ran the HP hardware diagnosics complete yesterday before I started the knoppix install, even including a full disk drive test, and it passed with flying colors. Add that to 3 or 4 hours of memory tests this morning with no errors.


Thanks for trying....

[Werner P. Schulz]

The system I'm running is fresh install of Knoppix 6..2.1 installed from a DVD I burned a couple years ago, ..

Did you test the integrity of this Knoppix DVD with cheatcode "knoppix testcd"?

[thriftee]

No, I didn't know about that option till this morning when I was looking for the memtest.


I will give it a try.

[thriftee]

The knoppix testcd option on the 6.2.1 DVD said "All files Ok."

I finally broke down and borrowed a windows computer, redownloaded the DVD via easy torrent, and burned a new 7.2 DVD with windows 7, which was a lot easier than those things used to be to do. I really hated to have to use windows to do it, but didn't want to be a burden here. I also tested the 7.2 DVD before reloading from it.

Thanks for helping....