Using a second HDD for cache:

By Shrumster | January 3rd, 2009 | 5:48 am

Just thought about something while playing around with eBoostr on my mobile. Currently using a HP dv9540us, 4gb ram (3027 usable since I’m just using 32-bit Vista Home Premium) with two HDD slots. Right now, it’s at stock with 2x 120gb Fujitsu MHW2120BHs.

My system disk is split into 4 partitions, 2 ntfs-vista and 2 for linux (ext3 and swap). My second disk is just formatted as one partition.

Been playing around with my SD slot, and then I decided I wanted to see how things would run if I created a cache file on my second disk. Here are the results so far:

1024 mb cache file:

1st Run:

Direct access speed: 15.046 MB/s

Cache enable access speed: 22.085 MB/s

Ratio: 1.467

2nd Run:

Direct access speed: 14.508 MB/s

Cache enable access speed: 21.857 MB/s

Ratio:  1.506

3rd Run:

Direct access speed:  15.070 MB/s

Cache enable access speed: 21.858 MB/s

Ratio: 1.450

Seems like this is a good option for those with 2 disks. Might even give better results on desktops.

2 Responses to “Using a second HDD for cache:”

  1. Moonie
    Jan 03, 2009

    The good thing about that is a larger cache can be allocated without added expense of buying a flash device.


  2. Moonie
    Jan 03, 2009

    Oh, the drawback would be power consumption, since the disk would have to spin up for the cache to be accessed.