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scsidisk error mentre masterizzo



Posseggo un vecchio powermac con un bus scsi. Di recente ho sostituito
il lettore CDROM con un masterizzatore Teac CDR55S, correttamente visto
da cdrecord. Una volta creata una immagine iso con mkisofs ho provato a
dare in pasto a cdrecord il seguente comando:

>cdrecord -v -dummy speed=1 dev=0,3,0 -data gigi.iso >burnlog 2>&1

Il burnlog é il seguente:

scsidev: '0,3,0'
scsibus: 0 target: 3 lun: 0
Linux sg driver version: 2.1.40
WRa Data 00 0A 00 00
Cdrecord 1.10 (powerpc-unknown-linux-gnu) Copyright (C) 1995-2001 Jörg Schilling
TOC Type: 1 = CD-ROM
Using libscg version 'schily-0.5'
atapi: 0
Device type    : Removable CD-ROM
Version        : 2
Response Format: 2
Capabilities   : RELADR SYNC LINKED 
Vendor_info    : 'TEAC    '
Identifikation : 'CD-R55S         '
Revision       : '1.0R'
Device seems to be: Teac CD-R50S.
Using driver for Teac CD-R50S, Teac CD-R55S, JVC XR-W2010, Pinnacle RCD-5020 (teac_cdr50).
Driver flags   : SWABAUDIO
Buffer cap: 655360
Drive buf size : 655360 = 640 KB
FIFO size      : 4194304 = 4096 KB
Track 01: data  617 MB        
Total size:     708 MB (70:14.21) = 316066 sectors
Lout start:     709 MB (70:16/16) = 316066 sectors
Current Secsize: 2048
Blocks total: 359849 Blocks current: 359849 Blocks remaining: 43783
Starting to write CD/DVD at speed 1 in dummy mode for single session.
Last chance to quit, starting dummy write in 9 seconds.

Una volta passato il conto alla rovescia mi appaiono le righe:

SCSI disk error: host 0 channel 0 id 4 lun 0 return code = 6000000
scsidisk I/O error/ dev 08:14, sector NNNNNN
tante righe uguali a quella sopra ma con diversi NNNNN

Il computer si blocca: premendo ctrl+c ritorno alla shell, ma qualsiasi
comando io dia mi dice sempre scsidisk I/O error. Unico rimedio il
reboot HW.

Cosa puo' essere la causa di tutto cio'?

cdrecord -scanbus dice:

Linux sg driver version: 2.1.40
Cdrecord 1.10 (powerpc-unknown-linux-gnu) Copyright (C) 1995-2001 Jörg Schilling
Using libscg version 'schily-0.5'
scsibus0:
	0,0,0	  0) 'QUANTUM ' 'FIREBALL SE2.1S ' 'PJ0A' Disk
	0,1,0	  1) *
	0,2,0	  2) *
	0,3,0	  3) 'TEAC    ' 'CD-R55S         ' '1.0R' Removable CD-ROM
	0,4,0	  4) 'SAMSUNG ' 'WN34324U (gm028)' '0104' Disk
	0,5,0	  5) *
	0,6,0	  6) *
	0,7,0	  7) *

Ogni device scsi ha la parity check disabilitata e le terminazioni sono
sul quantum e sul samsung.

Grazie,
	Matteo.



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