unable to mount cdrom/cdrw using scsi emulation

Sorry, I'm not sure this is the right place to send this, but case not, please discard this mail.

I'm having some problem when trying to mount cdrom: I receive an error message and am still unable to read from cd at the mount point. It's possible to execute a music disc from the drives.
I've a cdrom drive and a cdrw drive and none of them work. All two drives work fine using ide-cd (ATAPI) driver.

I've made a complete bug report, but I'm not sure this is the case, so this mail contain only the error messages.

P.S.: sorry by the poor english.

TIA,
Ivo

These are the messages retrieved from kernel log:

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Aug 31 19:50:43 serv kernel: ide-scsi: The scsi wants to send us more data than expected - discarding data
Aug 31 19:50:43 serv kernel: ide-scsi: [[ 28 0 0 0 0 10 0 0 1 0 0 0 ]
Aug 31 19:50:43 serv kernel: ]
Aug 31 19:50:43 serv kernel: ide-scsi: expected 2048 got 4096 limit 2048

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This message appear many times on kern.log - I've noticed a number, on the second line, changing from 10 to 63 in hexadecimal notation. The number is shown below (between arrows):

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Aug 31 19:50:43 serv kernel: ide-scsi: [[ 28 0 0 0 0 ->10<- 0 0 1 0 0 0 ]

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So, this is the last repeated message on kernel log:

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Aug 31 19:50:43 serv kernel: ide-scsi: The scsi wants to send us more data than expected - discarding data
Aug 31 19:50:43 serv kernel: ide-scsi: [[ 28 0 0 0 0 63 0 0 1 0 0 0 ]
Aug 31 19:50:43 serv kernel: ]
Aug 31 19:50:43 serv kernel: ide-scsi: expected 2048 got 4096 limit 2048

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After that, I receive this message:

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Aug 31 19:50:43 serv kernel: Unable to identify CD-ROM format.

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