i have a sony cd-rw (ide) connect up on my redhat linux. but it just be treated as a generic cd-rom without the ability of cd burning. plsease show me the way how to fix this issue,thanks in advance.

What kernel are you using? If you're using the outdated 2.4 kernel series, you'd need scsi emulation for ide (scsi-ide) to burn.

i am using kernel 2.6.10. how i can get cd-rw working,thanks.

Just google linux cd-rw
for example
http://www.lugatgt.org/articles/cd_burning/

whether scsi emulation is need to linux running on kernel 2.6.10?

You do not need scsi emulation for 2.6.10.

thanks all , i recorded cd with xcdroast but failed at all. it seems there havent been any data writed on cd after finished processing.
below is the mesg:

Calling: /usr/lib/xcdroast-0.98/bin/xcdrwrap CDRECORD dev= "ATAPI:0,1,0" gracetime=2 fs=4096k driveropts=burnfree,noforcespeed -v -useinfo speed=12 -dao -dummy -eject -pad -text -data "/tmp/cd-burn/track-01.iso" ...

scsidev: 'ATAPI:0,1,0'
devname: 'ATAPI'
scsibus: 0 target: 1 lun: 0
Warning: Using ATA Packet interface.
Warning: The related libscg interface code is in pre alpha.
Warning: There may be fatal problems.
pregap1: -1
Cdrecord 2.0 (i686-pc-linux-gnu) Copyright (C) 1995-2002 Jörg Schilling
TOC Type: 1 = CD-ROM
Using libscg version 'schily-0.7'
Driveropts: 'burnfree,noforcespeed'
atapi: 1
Device type : Removable CD-ROM
Version : 0
Response Format: 2
Capabilities :
Vendor_info : 'SONY '
Identifikation : 'CD-RW CRX230ED '
Revision : '4YS1'
Device seems to be: Generic mmc CD-RW.
Using generic SCSI-3/mmc CD-R driver (mmc_cdr).
Driver flags : MMC-3 SWABAUDIO BURNFREE FORCESPEED
Supported modes: TAO PACKET SAO SAO/R96P SAO/R96R RAW/R16 RAW/R96P RAW/R96R
Drive buf size : 1419264 = 1386 KB
FIFO size : 4194304 = 4096 KB
Track 01: data 238 MB padsize: 30 KB
Total size: 274 MB (27:10.28) = 122271 sectors
Lout start: 274 MB (27:12/21) = 122271 sectors
Current Secsize: 2048
ATIP info from disk:
Indicated writing power: 5
Is not unrestricted
Is not erasable
Disk sub type: Medium Type A, high Beta category (A+) (3)
ATIP start of lead in: -11634 (97:26/66)
ATIP start of lead out: 359846 (79:59/71)
Disk type: Short strategy type (Phthalocyanine or similar)
Manuf. index: 3
Manufacturer: CMC Magnetics Corporation
Blocks total: 359846 Blocks current: 359846 Blocks remaining: 237575
Forcespeed is OFF.
Starting to write CD/DVD at speed 12 in dummy SAO mode for single session.
Waiting for reader process to fill input buffer ...
input buffer ready.
BURN-Free is ON.
Sending CUE sheet...
SAO startsec: -11634
Writing lead-in...
Lead-in write time: 15.368s
Writing pregap for track 1 at -150
Starting new track at sector: 0

Track 01: writing 30 KB of pad data.
Track 01: Total bytes read/written: 250380288/250411008 (122271 sectors).
Writing time: 151.496s
Average write speed 12.0x.
Min drive buffer fill was 94%
Fixating...
WARNING: Some drives don't like fixation in dummy mode.
Fixating time: 8.267s
BURN-Free was never needed.
cdrecord: fifo had 3944 puts and 3944 gets.
cdrecord: fifo was 0 times empty and 3863 times full, min fill was 96%.

i got this significant info from xcdroast.org:

Linux Kernel 2.6.8 broke CD-Writing:
I had several reports that the last 2.6.x kernel broke CD-Writing using the ATAPI driver. Don't update if you want to continue to use X-CD-Roast, or switch back to SCSI-emulation.

cdrecord works well for me now. you just replaces dev=scsi with
dev=/dev/hdc (if your cd-rw connect up on hdc) then enjoy.
may help,thanks again.

FYI, I use 2.6.11 with no problems burning cds through k3b without ide-scsi.