请教烧录问题。。。

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我用dvdrecord烧录光碟，结果出现了一下问题：
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[root@localhost hm9]#dvdrecord -eject dev="/dev/cdrom-sr1" speed=8 VIDEO_TS.iso

dvdrecord: No write mode specified.
dvdrecord: Asuming -tao mode.
dvdrecord: Future versions of wodim may have different drive dependent defaults.
Device type    : Removable CD-ROM
Version        : 5
Response Format: 2
Capabilities   :
Vendor_info    : 'HL-DT-ST'
Identification : 'DVDRAM GSA-H44N '
Revision       : 'RB01'
Device seems to be: Generic mmc2 DVD-R/DVD-RW.
Using generic SCSI-3/mmc DVD-R(W) driver (mmc_mdvd).
Driver flags   : SWABAUDIO BURNFREE
Supported modes: PACKET SAO
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    0 seconds. Operation starts.
Track 01: Total bytes read/written: 4681203712/4681203712 (2285744 sectors).
Errno: 5 (Input/output error), close track/session scsi sendcmd: no error
CDB:  5B 00 02 00 00 00 00 00 00 00
status: 0x2 (CHECK CONDITION)
Sense Bytes: 70 00 02 00 00 00 00 0A 00 00 00 0E 04 08 00 80
Sense Key: 0x2 Not Ready, Segment 0
Sense Code: 0x04 Qual 0x08 (logical unit not ready, long write in progress) Fru 0x0
Sense flags: Blk 0 (not valid) operation 0% done
cmd finished after 0.001s timeout 1000s
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当然结果烧录出来的光碟是不成功的，要不然我怎么会在这里发问。。。
谁知道是那么出现了问题么？是我的指令少了什么吗？但是我之前用同样的方法都成功烧录。。。