Re: [school-discuss] Knoppix for Kids Beta

[Stephen Liu <satimis@icare.com.hk>]

Hi Roger,

On Wed, 2003-06-18 at 13:42, Roger Dingledine wrote:
> On Wed, Jun 18, 2003 at 12:06:22PM +0800, Stephen Liu wrote:.
> 
> You should now run "md5sum knoppix.release.iso", and compare the output
> to the one Harry told us (b838e362a364a2db2805fc6fe39e089d)

md5sum verified identical to

b838e362a364a2db2805fc6fe39e089d  knoppix.release.iso

> > Are you aware whether CD-RW with 700MB capacity is available on market? 
> > All CD-RWs in my possession are of only 650MB.  I expect to use CD-RW as
> > it is re-usable.
> > 
> > OR  Any folk on the list has this information?
> 
> I don't know much about CD-RWs, but my first guess is that 650 and 700
> are the same number. Perhaps one of them is counting in millions of bytes,
> and the other is counting thousands of kilobytes (1024 bytes).
> 
> You could mail Harry and ask, to be sure. Or just try it


Carried out following tests on CD-RW;

OS: RH 8.0
Burner:  Samsung with 8MB cache
Speed:   40x 12x 40x
CD-RW used:	4x - 10x 650MB
Burning software: X-Cd-roast Version 0.98alpha9

1st test
========
burning speed:  10x
Fail - Error writing tracks


2nd test
========
burning speed:  8x
Still fail - Error writing tracks

Output
======
Calling: /usr/lib/xcdroast-0.98/bin/xcdrwrap CDRECORD dev= "0,0,0"
fs=8192k driveropts=burnproof -v -useinfo speed=8 -dao -eject -pad -data
"/home/satimis/Download/Knoppix for kid/knoppix.release.iso" ...

scsidev: '0,0,0'
scsibus: 0 target: 0 lun: 0
Linux sg driver version: 3.1.24
pregap1: -1
Cdrecord 1.10 (i686-pc-linux-gnu) Copyright (C) 1995-2001 Jörg Schilling
TOC Type: 1 = CD-ROM
Using libscg version 'schily-0.5'
Driveropts: 'burnproof'
atapi: 1
Device type    : Removable CD-ROM
Version        : 0
Response Format: 1
Vendor_info    : 'SAMSUNG '
Identifikation : 'CD-R/RW SW-240B '
Revision       : 'R403'
Device seems to be: Generic CD-ROM.
Using generic SCSI-3/mmc CD-R driver (mmc_cdr).
Driver flags   : SWABAUDIO
Drive buf size : 5554176 = 5424 KB
FIFO size      : 8388608 = 8192 KB
cdrecord: WARNING: Data may not fit on current disk.
Track 01: data  698 MB         padsize:  30 KB
Total size:     802 MB (79:31.52) = 357864 sectors
Lout start:     803 MB (79:33/39) = 357864 sectors
Current Secsize: 2048
ATIP info from disk:
Indicated writing power: 2
Reference speed: 6
Is not unrestricted
Is erasable
Disk sub type: High speed Rewritable (CAV) media (1)
ATIP start of lead in:  -11615 (97:27/10)
ATIP start of lead out: 335925 (74:41/00)
speed low: 4 speed high: 8
power mult factor: 1 5
recommended erase/write power: 5
A2 values: 00 00 00
Disk type:    Phase change
Manuf. index: 18
Manufacturer: Plasmon Data systems Ltd.
Blocks total: 335925 Blocks current: 335925 Blocks remaining: -21939
Starting to write CD/DVD at speed 4 in write mode for single session.
0 seconds. Operation starts.
Waiting for reader process to fill input buffer ...
input buffer ready.
cdrecord: Turning BURN-Proof on
Performing OPC...
Sending CUE sheet...
cdrecord: WARNING: Drive returns wrong startsec (0) using -150
Writing pregap for track 1 at -150
Starting new track at sector: 0
cdrecord: Input/output error. write_g1: scsi sendcmd: no error
CDB:  2A 00 00 05 50 DA 00 00 1F 00
status: 0x2 (CHECK CONDITION)
Sense Bytes: 71 00 03 00 00 00 00 0C 00 00 00 00 0C 00 00 00
Sense Key: 0x3 Medium Error, deferred error, Segment 0
Sense Code: 0x0C Qual 0x00 (write error) Fru 0x0
Sense flags: Blk 0 (not valid) 
cmd finished after 2.399s timeout 200s

Sense Bytes: 70 00 00 00 00 00 00 0C 00 00 00 00 00 00 00 00 00 00
write track data: error after 713478144 bytes
Writing  time: 1200.906s
Fixating...
Fixating time:    0.003s


I have not tried on CR-R yet.  

Previously I burnt many Redhat ISO images on CD-RW without problem
including OFST image

Have you had any advice?

B.Regards
Stephen