Re: CD-ROM block size

[Dima Veselov <kab00m%lich.phys.spbu.ru@localhost>]

> > Greetings!
> >
> > I wonder is there a way to know blocksize of
> > CD-ROM? I have a number of old machines required
> > to use 512-byte SCSI CD-ROM and I want to ensure
> > 512-byte mode is enabled or supported.
> >
> > I tried atactl and it shows wrong block size,
> >  always reporting 512, >> even on certainly 2k
> > CD-ROM.
>
> This mostly matters for the firmware and for
> booting from CD-ROM. The physical media is always
> 2048 byte sectors but some drives can enable
> emulated 512-byte access with the SCSI MODE
> SELECT command. Good drives for both Sun and
> DEC are the Toshiba XM series.
> These resources might be useful:

Thank you for the answer. I guess real question
was then - how one can find that drive is able tp
emulate 512-byte access? Is it possible to question
SCSI or test it somehow in the running system?

--
Sincerely yours,
Dima Veselov
Physics R&D Establishment of Saint-Petersburg University