Hard drive raw data read/write speeds.
So i need tech answers sirs and madams.
So, short summary of my issue. I've got hard drives that are running a database. This database does not cache the data (for reliability), so whats been discovered is that the 160 MB/s read /write average speed (per the spec sheets) hard drives we have running them is actually running at about 200kb/s when it comes to database writes.
I've been over the spec sheet for the drive and cannot for the life of me find a number that gives me the true raw write/read speed of these drives. While its obvious the company is not going to hamper its ability to sell the drives by advertising low numbers, i need to know what to look for on a spec sheet so i can point to it and tell my boss what drive would meet the needs for a product that is expecting a 10MB/s write speed.
The only way i was able to determine the current hard drives speed was to use dd with the oflag=dsync option. how do i find this number (or at least calculate it with the given information) when shopping?
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