Problem with read back a fresh written cdrom.
[root@X-home:/btemp] # uname -a
Linux X-home 2.4.19-rc1 #2 Sat Jul 6 03:10:16 EDT 2002 i686 unknown
[root@X-home:/btemp] # ls -ld rescue.iso
-rw-r--r-- 1 root root 6881280 May 19 22:26 rescue.iso
[root@X-home:/btemp] # cdrecord dev=0,0 speed=4 -v rescue.iso
Cdrecord 1.10 (i686-pc-linux-gnu) Copyright (C) 1995-2001 Jörg Schilling
TOC Type: 1 = CD-ROM
scsidev: '0,0'
scsibus: 0 target: 0 lun: 0
Linux sg driver version: 3.1.24
Using libscg version 'schily-0.5'
atapi: 1
Device type : Removable CD-ROM
Version : 0
Response Format: 1
Vendor_info : 'SONY '
Identifikation : 'CD-RW CRX160E '
Revision : '1.0e'
Device seems to be: Generic mmc CD-RW.
Using generic SCSI-3/mmc CD-R driver (mmc_cdr).
Driver flags : SWABAUDIO
Drive buf size : 4183552 = 4085 KB
FIFO size : 4194304 = 4096 KB
Track 01: data 6 MB
Total size: 7 MB (00:44.82) = 3362 sectors
Lout start: 7 MB (00:46/62) = 3362 sectors
Current Secsize: 2048
ATIP info from disk:
Indicated writing power: 3
Reference speed: 6
Is not unrestricted
Is erasable
Disk sub type: High speed Rewritable (CAV) media (1)
ATIP start of lead in: -11625 (97:27/00)
ATIP start of lead out: 333750 (74:12/00)
speed low: 4 speed high: 8
power mult factor: 1 5
recommended erase/write power: 5
A2 values: 26 B2 4A
Disk type: Phase change
Manuf. index: 0
Manufacturer: Illegal Manufacturer code
Blocks total: 333750 Blocks current: 333750 Blocks remaining: 330388
RBlocks total: 336246 RBlocks current: 336246 RBlocks remaining: 332884
Starting to write CD/DVD at speed 4 in write mode for single session.
Last chance to quit, starting real write in 0 seconds. Operation starts.
Waiting for reader process to fill input buffer ... input buffer ready.
Performing OPC...
Starting new track at sector: 0
Track 01: 6 of 6 MB written (fifo 100%).
Track 01: Total bytes read/written: 6881280/6881280 (3360 sectors).
Writing time: 18.307s
Fixating...
Fixating time: 61.619s
cdrecord: fifo had 109 puts and 109 gets.
cdrecord: fifo was 0 times empty and 7 times full, min fill was 89%.
[root@X-home:/btemp] # md5sum /dev/sr0
md5sum: /dev/sr0: Input/output error <- oups, it failed
[root@X-home:/btemp] # dd if=/dev/sr0 | md5sum
dd: reading `/dev/sr0': Input/output error <- failed here too
13440+0 records in
13440+0 records out
5ec08b6fa7bf09741d1310e5baa800de - <- but md5sum is OK
[root@X-home:/btemp] # md5sum rescue.iso
5ec08b6fa7bf09741d1310e5baa800de rescue.iso
[root@X-home:/btemp] # cat /dev/sr0 > xxx
[root@X-home:/btemp] # diff xxx rescue.iso
[root@X-home:/btemp] # cksum /dev/sr0
3592423142 6881280 /dev/sr0
[root@X-home:/btemp] # cksum rescue.iso
3592423142 6881280 rescue.iso
[root@X-home:/btemp] # dd if=/dev/sr0 | md5sum <- Note this one do not get input/output error
13440+0 records in
13440+0 records out
5ec08b6fa7bf09741d1310e5baa800de -
[root@X-home:/btemp] # md5sum /dev/sr0
5ec08b6fa7bf09741d1310e5baa800de /dev/sr0
[root@X-home:/btemp] # md5sum /dev/sr0 rescue.iso
5ec08b6fa7bf09741d1310e5baa800de /dev/sr0
5ec08b6fa7bf09741d1310e5baa800de rescue.iso
[root@X-home:/btemp] # md5sum /dev/sr0 rescue.iso <- it now work every time
5ec08b6fa7bf09741d1310e5baa800de /dev/sr0
5ec08b6fa7bf09741d1310e5baa800de rescue.iso
[root@X-home:/btemp] # eject
After re-insertion...
[root@X-home:/btemp] # md5sum /dev/sr0 rescue.iso
md5sum: /dev/sr0: Input/output error <- inout/output error on /dev/sr0
5ec08b6fa7bf09741d1310e5baa800de rescue.iso
Can someone reproduce the "Input/output error" I get sometimes with "dd" and with "md5sum" on /dev/sr0
after burning a new CD ?
I'm pretty sure it was not doing that with 2.4.18
Looks like it fix itself after several minutes or many trys.
running 2.4.19-rc1
Xtian.
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This archive was generated by hypermail 2b29 : Sun Jul 07 2002 - 22:00:17 EST