Messages in this thread | | | Date | Sun, 07 Jul 2002 06:07:44 -0400 | From | Christian Robert <> | Subject | ittle problems with /dev/sr0 with 2.4.19-rc1 |
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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
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