[sisyphus] Re: /dev/cdrom cries in pain

[Alexei Takaseev]

On Sun, 30 Jan 2005 18:28:26 +0300
"Konstantin A. Lepikhov" <lakostis на anti-leasure.ru> wrote:

> > > > А какой тогда кошерный метод записи? Пробовал записывать через
> > > > устройство dev=ATAPI:/dev/hdd (ATAPI:0,1,0), запись идет, ничего
> > > > не зависает, но потом таким образом записаный диск на этом же
> > > > приводе читается со скоростью 100-200 кбайт/сек. На соседнем
> > > > простом CD диск вообще не читается. Привод NEC-2510A.
> > > самый правильный - dev=/dev/hdd и никаких ATAPI :)
> > 
> > Пробовал. С тем же результатом - низкая скорость чтения на том же
> > приводе и полная нечитаемость на другом приводе.
> показывайте лог cdrecord и что в это время в messages пишется. Также
> интересно знать настройки DMA для этого привода.

Лог cdrecord:

=======================================================================
Cdrecord-Clone 2.01a37 (i586-alt-linux-gnu) Copyright (C) 1995-2004
JЖrg Schilling scsidev: '/dev/hdd'
devname: '/dev/hdd'
scsibus: -2 target: -2 lun: -2
Warning: Open by 'devname' is unintentional and not supported.
Linux sg driver version: 3.5.27
cdrecord: Warning: Linux kernel version is 2.6.10
cdrecord: Enabling compatibility hack!
Using libscg version 'schily-0.8'.
Device type    : Removable CD-ROM
Version        : 0
Response Format: 2
Capabilities   :
Vendor_info    : '_NEC    '
Identifikation : 'DVD_RW ND-2510A '
Revision       : '2.05'
Device seems to be: Generic mmc2 DVD-R/DVD-RW.
cdrecord: This version of cdrecord does not include DVD-R/DVD-RW support
code. cdrecord: If you need DVD-R/DVD-RW support, ask the Author for
cdrecord-ProDVD. cdrecord: Free test versions and free keys for personal
use are at ftp://ftp.berlios.de/pub/cdrecord/ProDVD/ Using generic
SCSI-3/mmc   CD-R/CD-RW driver (mmc_cdr). Driver flags   : MMC-3
SWABAUDIO BURNFREE Supported modes: TAO PACKET SAO SAO/R96R RAW/R96R
Starting to write CD/DVD at speed 10 in real BLANK mode for single
session. Last chance to quit, starting real write    0 seconds.
Operation starts. cdrecord: No write mode specified.
cdrecord: Asuming -tao mode.
cdrecord: Future versions of cdrecord may have different drive dependent
defaults. cdrecord: Continuing in 5 seconds...
Cdrecord-Clone 2.01a37 (i586-alt-linux-gnu) Copyright (C) 1995-2004 JЖrg
Schilling TOC Type: 3 = CD-ROM XA mode 2
scsidev: '/dev/hdd'
devname: '/dev/hdd'
scsibus: -2 target: -2 lun: -2
Warning: Open by 'devname' is unintentional and not supported.
Linux sg driver version: 3.5.27
cdrecord: Warning: Linux kernel version is 2.6.10
cdrecord: Enabling compatibility hack!
Using libscg version 'schily-0.8'.
SCSI buffer size: 64512
atapi: 1
Device type    : Removable CD-ROM
Version        : 0
Response Format: 2
Capabilities   :
Vendor_info    : '_NEC    '
Identifikation : 'DVD_RW ND-2510A '
Revision       : '2.05'
Device seems to be: Generic mmc2 DVD-R/DVD-RW.
Current: 0x000A
Profile: 0x002B
Profile: 0x001B
Profile: 0x001A
Profile: 0x0014
Profile: 0x0013
Profile: 0x0011
Profile: 0x0010
Profile: 0x000A (current)
Profile: 0x0009
Profile: 0x0008 (current)
cdrecord: This version of cdrecord does not include DVD-R/DVD-RW support
code. cdrecord: If you need DVD-R/DVD-RW support, ask the Author for
cdrecord-ProDVD. cdrecord: Free test versions and free keys for personal
use are at ftp://ftp.berlios.de/pub/cdrecord/ProDVD/ Using generic
SCSI-3/mmc   CD-R/CD-RW driver (mmc_cdr). Driver flags   : MMC-3
SWABAUDIO BURNFREE Supported modes: TAO PACKET SAO SAO/R96R RAW/R96R
Drive buf size : 1343488 = 1312 KB
FIFO size      : 4194304 = 4096 KB
Track 01: data   327 MB
Total size:      375 MB (37:12.45) = 167434 sectors
Lout start:      375 MB (37:14/34) = 167434 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:  -11635 (97:26/65)
  ATIP start of lead out: 359849 (79:59/74)
  1T speed low:  4 1T speed high: 10
  2T speed low:  4 2T speed high:  0 (reserved val  6)
  power mult factor: 1 5
  recommended erase/write power: 3
  A1 values: 24 1A BC
  A2 values: 26 B2 26
Disk type:    Phase change
Manuf. index: 3
Manufacturer: CMC Magnetics Corporation
Blocks total: 359849 Blocks current: 359849 Blocks remaining: 192415
cdrecord: Warning: Linux kernel version is 2.6.10
cdrecord: Enabling compatibility hack!
cdrecord: Warning: Linux kernel version is 2.6.10
cdrecord: Enabling compatibility hack!
Starting to write CD/DVD at speed 10 in real TAO mode for multi session.
Last chance to quit, starting real write    0 seconds. Operation starts.
Waiting for reader process to fill input buffer ... input buffer ready.
BURN-Free is OFF.
Performing OPC...
Starting new track at sector: 0
Track 01:  327 of  327 MB written (fifo 100%) [buf 100%]  10.5x.
Track 01: Total bytes read/written: 342900736/342900736 (167432
sectors). Writing  time:  230.300s
Average write speed   9.8x.
Min drive buffer fill was 100%
Fixating...
Fixating time:   37.382s
cdrecord: fifo had 5402 puts and 5402 gets.
cdrecord: fifo was 0 times empty and 5320 times full, min fill was 87%.
=====================================================================

То есть ничего особенного криминального  не вижу. Во время записи и
чтения в логи абсолюто ничего не сыплется.

Вот что говорит hdparm:

[root на metamorph log]# hdparm /dev/hdd

/dev/hdd:
 IO_support   =  1 (32-bit)
 unmaskirq    =  1 (on)
 using_dma    =  1 (on)
 keepsettings =  0 (off)
 readonly     =  0 (off)
 readahead    = 256 (on)
 HDIO_GETGEO failed: Invalid argument
[root на metamorph log]#