X-bit labs

Hitachi Deskstar 7K400 HDD: Godzilla Resurrection (page 8)

Category: Storage

by Sergey Romanov

[ 05/23/2005 | 10:11 AM ]

Performance during Sequential Reading/Writing and Average Access Time

I’m going to start the IOMeter tests by exploring the fundamental characteristics of the drives. Creating a queue of sequential requests to read and write ever bigger data blocks, we can evaluate the efficiency of the interaction with the HDD electronics.

Sequential Read/Write results (click here to view the results table)

The reading performance of the 7K250 and 7K400 is so similar that the graphs merge in one. You may remember from our previous report that there were no differences between ordinary and adaptive look-ahead reading algorithms at linear reading, so the results shown in the diagram are quite comprehensible. But it’s anyway good that the new generation of electronics is no less efficient than the older one – we have often seen that new drive models would be slower than their predecessors in reading small-size blocks.

There are no big differences between the participating models at linear writing, either. The 7K400 is somewhat slower than the previous model, even though the gap is negligible.