> -------Sequential Output-------- ---Sequential Input-- --Random--
> -Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---
> MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU
> 500 3742 46.8 4623 6.7 2604 7.9 6614 72.9 13314 14.6 183.4 3.2
>
> vmstat shows blocks in and out maxing out at 9000, but typically in th
> 4500-5500 range at any given time.
>
> If these are in fact poor numbers, what is wrong with my system. I feel
> like I should be seeing numbers 5 times these.
>
> I expect that the performance issue is that the logical drive is
> configured for Write Thru caching for safety reasons. If you use
> the BIOS Configuration Utility to enable Write Back caching, I
> expect the numbers will increase dramatically. In order to use
> Write Back caching safely, one really should have a battery backup
> unit installed or at least a UPS. Please give that a try and report
> on the results you achieve. Leonard
Why would changing the write cache policy improve read performance?
- C
