On Mon, 8 Jul 2024 15:34:53 +0300 Dima Veselov <[email protected]> wrote:
> 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: https://web.archive.org/web/20050110004406/http://narpes.com/aw/vax/dec-cdrom-list.txt https://web.archive.org/web/20220830171707/http://www.computeranddata.com/doc/faq/cdrom/suncds.html -Tobias
