The absolute translation of logical block to head position is unknown to e.g. Linux. While it is possible to reverse engineer the physical disk layout by looking at timings, for general purpose computing this is going way too far. I think the upcoming ATA-7 hard disk standard has some more options to get information about the layout of the disk, but I'm not sure of that.
Anyway, simple sorting on LBA address will typically reduce head seeks to a large extent, resulting in most of the potential benefit. It is important however to make sure that multiple requests are available to the driver to sort.
Has anybody thought about the fact that this removes the option of network level filtering? Think about the scenario in which a virus is created that spreads quickly via web servers (e.g. IIS). Currently, it is possible to filter out viral traffic because the routers can inspect the messages. This prevents the spread of the virus even though the hosts/severs remain vulnerable.
Once all traffic is encrypted using OE, the routers/firewalls cannot recognise the type of traffic anymore, and virii will be able to spread to all vulnerable hosts.
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The absolute translation of logical block to head position is unknown to e.g. Linux. While it is possible to reverse engineer the physical disk layout by looking at timings, for general purpose computing this is going way too far. I think the upcoming ATA-7 hard disk standard has some more options to get information about the layout of the disk, but I'm not sure of that.
Anyway, simple sorting on LBA address will typically reduce head seeks to a large extent, resulting in most of the potential benefit. It is important however to make sure that multiple requests are available to the driver to sort.
... but I own the business patent of earning money by using bad patents, so please hand it over.
Has anybody thought about the fact that this removes the option of network level filtering? Think about the scenario in which a virus is created that spreads quickly via web servers (e.g. IIS). Currently, it is possible to filter out viral traffic because the routers can inspect the messages. This prevents the spread of the virus even though the hosts/severs remain vulnerable.
Once all traffic is encrypted using OE, the routers/firewalls cannot recognise the type of traffic anymore, and virii will be able to spread to all vulnerable hosts.