try something simpler:
cdrecord dev=0,0,0 Knoppix.iso
(but you need to give the full name of and -- depending on where you are -- path to the iso.)
The above lets cdrecord select the speed. Make sure you're using a 700Mb CD.
I downlaoded a Knoppix image and burn it in to a CDROM.
there was some problem with KDE(frequnet crashes) and it got freezed up.Then i tried to boot without any graphix.That works fine.
After some time I have got a error message like
CLOOP:read errroe at pos ********* in the file cdrom/KNOPPIX.
My md5checksum values are ok.
Then i booted with "knoppix testcd" it checks the md5sum and says that some files might have corrupted(I forget the exact output)
I went thro the FAQ in Knopiix.net and found that it may be because of the cd burner( CD-burner created a defective CD due to wrong writing speed or bad media).The command i gave is
cdrecord -v speed=2 dev=0,0,0 -data KNOPP*.iso.
Is there anything wrong in this.Any more options are needed or what?.if yes what it is?.
I read that one has to burn the cd as a "Single Session CD" or select finalize. The Mode should be set as "Disk at once" or "Track at once" .(Reference http://www.knoppix.net/docs/index.php/FaqDownloading).
Plz clarify my doubts
Thx in advance
try something simpler:
cdrecord dev=0,0,0 Knoppix.iso
(but you need to give the full name of and -- depending on where you are -- path to the iso.)
The above lets cdrecord select the speed. Make sure you're using a 700Mb CD.
Thanks .It is working now.I guess some problem with the CD

IBM SYSTEM X3500 M3 SERVER 7380AC1 TOWER Server XEON E5620 8GB RAID SEE NOTES
$108.92
$400.00
Lot of 2 IBM blade center Type H chassis 8852
$559.00
IBM 7915 AC1 M4 E27R704 Server Intel 2650V2 32GB RAM NO HDD w/ 2x 750w PSU
$200.00
IBM 4262 SYSTEM x3200 Tower - HDD Wiped, NO OS
$80.00
IBM iDataPlex dx360 M4 with 4× Xeon E5-2680 v2, 128 GB RAM, 2× QLogic
$149.00
IBM Power 8 S822L Server 8247-22L POWER8 Enterprise 256GB RAM 2x 00KV626 CPU
$999.99
IBM Power 710 Express 8231-E2B POWER7 16GB DDR3 RAM 2U Rack Server No HDD.
$409.99
IBM QRadar xx29 2x Xeon E5-2650v4 2x 900W PSU M5120 12x 3.5" Bay Server No RAM
$149.99
Unused IBM 09P0037 MAINBOARD For RS/6000 7044-170 P-Series
$281.25