Status of support for 4KB disk sectors

Peter Jeremy peterjeremy at
Tue Jul 19 21:10:51 UTC 2011

On 2011-Jul-19 10:54:38 -0700, Chuck Swiger <cswiger at> wrote:
>  Unix operating
>systems like SunOS 3 and NEXTSTEP would happily run with a DEV_BSIZE
>of 1024 or larger-- they'd boot fine off of optical media using
>2048-byte sectors,

Actually, Sun used customised CD-ROM drives that faked 512-byte
sectors to work around their lack of support for anything else.

> some of the early 1990's era SCSI
>hard drives supported low-level reformatting to a different sector
>size like 1024 or 2048 bytes.

Did anyone actually do this?  I wanted to but was warned against
it by the local OS rep (this was a Motorola SVR2).

Peter Jeremy
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