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SubjectRe: cdrecord from ext3
Interesting. I've burnt just fine with `cdrecord -v speed=20 dev=0,0,0
foo.iso` to an ATAPI Yamaha CRW2200 (2.4.13-ac1+freeswap). Lowest FIFO
reports are ~78%. I gave up my Plexwriter 8/20 a while back, so I'd look
at the aic7xxx driver.

---
Dan Chen crimsun@email.unc.edu
GPG key: www.cs.unc.edu/~chenda/pubkey.gpg.asc

On Wed, 31 Oct 2001, J . A . Magallon wrote:

> Hi all,
>
> I have found a strange problem using cdrecord from an ext3 partition.
> When burning a cd image (about 500Mb), with cdrecord -v to see some info,
> after about 150Mb the percentage of fifo filled begins to drop, until the
> burning fails. I though it was related to some buffer/cache issue, but
> then I just copied the image to an ext2 partition (so the cache still
> filled more, just reaching my ram size), and burnt perfect from the
> ext2 partition.
>
> So it looks like ext3 can not give a sustained read rate (not so much,
> burning was at 8x). Fifo from ext2 never dropped below 99%.
>
> Is this a bug or the answer is just 'never toast from a journaled fs' ?
>
> Kernel: 2.4.13-ac5+bproc, controller is an Adaptec
>
> Controller:
> Adaptec AIC7xxx driver version: 6.2.4
> aic7890/91: Ultra2 Wide Channel A, SCSI Id=7, 32/253 SCBs
>
> Drives:
> Host: scsi0 Channel: 00 Id: 00 Lun: 00
> Vendor: IBM Model: DDYS-T09170N Rev: S96H
> Type: Direct-Access ANSI SCSI revision: 03
> Host: scsi0 Channel: 00 Id: 01 Lun: 00
> Vendor: IBM Model: DCAS-34330W Rev: S65A
> Type: Direct-Access ANSI SCSI revision: 02
> Host: scsi1 Channel: 00 Id: 00 Lun: 00
> Vendor: CREATIVE Model: CD5230E Rev: 1.01
> Type: CD-ROM ANSI SCSI revision: 02
> Host: scsi1 Channel: 00 Id: 01 Lun: 00
> Vendor: YAMAHA Model: CRW8424E Rev: 1.0j
> Type: CD-ROM ANSI SCSI revision: 02
>
> Settings:
> Channel A Target 0 Negotiation Settings
> User: 80.000MB/s transfers (40.000MHz, offset 255, 16bit)
> Goal: 80.000MB/s transfers (40.000MHz, offset 63, 16bit)
> Curr: 80.000MB/s transfers (40.000MHz, offset 63, 16bit)
> (ext2)
> Channel A Target 1 Negotiation Settings
> User: 80.000MB/s transfers (40.000MHz, offset 255, 16bit)
> Goal: 40.000MB/s transfers (20.000MHz, offset 15, 16bit)
> Curr: 40.000MB/s transfers (20.000MHz, offset 15, 16bit)
> (ext3)
>
>

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