would specifying differing input & output block sizes with dd help?
On Tue, 26 Oct 1999, Stephen C. Tweedie wrote:
-Hi,
-
-
-On Tue, 19 Oct 1999 20:12:20 -0700, "Tom Livingston" <[EMAIL PROTECTED]>
-said:
-
->> Has anyone else tried raw-io with md devices? It works for me but the
->> performance is quite bad.
-
-> This is a recently reported issue on the linux-kernel mailing list.
-> The jist of it is that rawio is using a 512 byte blocksize, where raid
-> assumes a 1024. This was only first reported a couple of days ago
-> (10/16)
-
-Yep. It's not clear just yet exactly how best to fix this --- the
-hacked patch which forces the raw IO blocksize to 1024 will break
-applications which (legitimately) expect to be able to perform 512-byte
-IOs on the raw device. I'll let people know once we've figured out how
-to get 512-byte IOs working on raid decently.
-
---Stephen
-
