Re: kiobuf using kernel pages

Scott Lurndal (slurn@griffin.engr.sgi.com)
Thu, 18 Nov 1999 16:59:33 -0800 (PST)


------ From Alan Cox <alan@lxorguk.ukuu.org.uk>

> > 3) In theory (I don't have IDE disk to try on), using the ide-scsi
> > driver should allow the sd_raw* stuff to work on ide drives.

> Only recent ones. ATAPI isnt on older drives

True, however, one might question the utility of supporting
character disk device (raw) I/O on older IDE drives, as it is
primarily useful for high-performance disk I/O (e.g. for Oracle)
which is not a strength of IDE/EIDE/UDMA devices, and
the block device can always be used on IDE devices, it's just
slower (and may affect the page cache behavior).

scott

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