> >
> > Executing 'write_g1' command on Bus 0 Target 1, Lun 0 timeout 200s
> > CDB: 2A 00 00 00 02 6C 00 00 1F 00
> > Sending 63488 (0xF800) bytes of data.
> > Write Data: 00 00 01 BA 44 00 45 2B A6 03 01 89 C3 F8 00 00 01 E0 07
> > EC 81 00 00 EF BF 23 2B 10 2C A4 DC 35 04 13 00 E4 E4 D4 7E 8F B8 04
> > 3D 94 47 89 5D FA 52 46 CD 96 26 B7 06 E2 6A 3A 46 93 DF C9 18 67 A8
> > 37 E2 F0 1D 7B 52 4D 47 DD F1 39 A5 4A BA B9 3A D3 86 10 93 D2 90 FD
> > DD 4A 10 6D 57 CC 8E 31 67 8F EE 06
> > ioctl ret: 0
> > host_status: 00 driver_status: 28
> > ./cdrecord: Input/output error. write_g1: scsi sendcmd: no error
> > CDB: 2A 00 00 00 02 6C 00 00 1F 00
> > status: 0x2 (CHECK CONDITION)
> > Sense Bytes: 70 00 02 00 00 00 00 0E 00 00 00 00 04 08 00 00
> > 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)
> > cmd finished after 0.006s timeout 200s
> >
> > But while I try to let my program retry until the "write" command
> > successful. It will
> > be failed after hundreds times with
> >
> > FAIL!!! CDB: 2A 0 0 0 2 6C 0 0 1F 0
> > ?: Input/output error. : scsi sendcmd: no error
> > CDB: 2A 00 00 00 02 6C 00 00 1F 00
> > status: 0x2 (CHECK CONDITION)
> > Sense Bytes: 70 00 05 00 00 00 00 0E 00 00 00 00 21 02 00 00
> > Sense Key: 0x5 Illegal Request, Segment 0
> > Sense Code: 0x21 Qual 0x02 (logical block address out of range) [No
> > matching
> > qualifier] Fru 0x0
> > Sense flags: Blk 0 (not valid)
> > cmd finished after 0.005s timeout 20s
> >
> >
> You have to retry the same write command several times until it
> succeeds.
> After that you need to write to the next writable address. That error is
> generated because you have retried the same write command after it
> succeeded.
> It takes so long to do the first write because it first has to write the
> Lead in area and only after that it will write the data from cache.
> After
> the Lead In is written the write will go much faster, about 1.35MB/s for
> 1x.
>
Thank you for your reply. But I still have some questions need your
help.
Now I understand why some burners will fail to be feed data after their
buffer is full first time. But why I failed to retry and get sense (key:0x05
asc:0x21 ascq:0x02)? Maybe the retry frequency should be lower?
Jack
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