Only on write this is a read test.
----- Original Message ----- From: "Arne Wörner" <[EMAIL PROTECTED]>


Furthermore RAID-5 needs to read the parity block, before it can
update that block, so that there are 2 disc transactions more,
which could explain the better performance of a single disk, too?

Or does the striping effect (inherent to RAID-5) compensate those
2 extra transactions (at least in case of sequential writes)?



================================================
This e.mail is private and confidential between Multiplay (UK) Ltd. and the person or entity to whom it is addressed. In the event of misdirection, the recipient is prohibited from using, copying, printing or otherwise disseminating it or any information contained in it.


In the event of misdirection, illegible or incomplete transmission please 
telephone (023) 8024 3137
or return the E.mail to [EMAIL PROTECTED]

_______________________________________________
freebsd-performance@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-performance
To unsubscribe, send any mail to "[EMAIL PROTECTED]"

Reply via email to