Just saw this on Amazon and think it is a great price for the device.
Drobo + DroboShare (Network Attach) £356
The Drobo is a 4 Drive bay raid system (1 Disk redundancy) that automagically adds new/bigger drives into the system. As long as you only replace one drive at a time. The Drobo Share adds NAS, takes the Drobos usb interface and makes the drive avaliable on the Network.
I still think the Drobo Pro version will be much better investment in the long term as it has 8 bays and can do double disk redundancy but does cost £970 with out drives and is not NAS (Network Attached Storage)
Showing posts with label Power. Show all posts
Showing posts with label Power. Show all posts
Wednesday, 16 September 2009
Wednesday, 25 March 2009
Why put a laptop drive in a desktop pc?
This is a follow on from my Low Power Server recommendation
Why do I keep talking about laptop drives:
A laptop drive in a fully active Read/Write state uses only 3 watts and can idle at less than 1Watt and when it spins down is next to nothing at all, and has ten times the life span of a desktop drive in terms of spin up/down toggles, but they are a lot more expensive per GB than a standard 3.5" desktop drive.
So extending the life of your server drives, getting better value for money and saving power can be reached by combining the 2 types of drive.
The bulk of your storage should sit on a 3.5" desktop drive, cheap storage. The server should spin down this power hungry drive after it has not been used for some thing like 1 hour, this ensure it is not spinning up/down all day, but saves loads of power when inactive for periods of time (You go to work and sleep at night, don't you?).
The Operating System should live on a 2.5" laptop drive which will be on for most of the time (because of writing to log files) but could handle a really short spin down inactivity time if you wished. This greatly reduced the idle power of your PC, assuming that you used a low power mother board and cpu.
Power Dissipation of laptop drive from Western Digital
Power Dissipation of desktop drive from Western Digital
Why do I keep talking about laptop drives:
A laptop drive in a fully active Read/Write state uses only 3 watts and can idle at less than 1Watt and when it spins down is next to nothing at all, and has ten times the life span of a desktop drive in terms of spin up/down toggles, but they are a lot more expensive per GB than a standard 3.5" desktop drive.
So extending the life of your server drives, getting better value for money and saving power can be reached by combining the 2 types of drive.
The bulk of your storage should sit on a 3.5" desktop drive, cheap storage. The server should spin down this power hungry drive after it has not been used for some thing like 1 hour, this ensure it is not spinning up/down all day, but saves loads of power when inactive for periods of time (You go to work and sleep at night, don't you?).
The Operating System should live on a 2.5" laptop drive which will be on for most of the time (because of writing to log files) but could handle a really short spin down inactivity time if you wished. This greatly reduced the idle power of your PC, assuming that you used a low power mother board and cpu.
Power Dissipation of laptop drive from Western Digital
| Read/Write | 2.50 Watts |
| Idle | 0.85 Watts |
| Standby | 0.25 Watts |
| Sleep | 0.10 Watts |
Power Dissipation of desktop drive from Western Digital
| Read/Write | 6.00 Watts | |
| Idle | 3.7 Watts | |
| Standby | 0.80 Watts | |
| Sleep | 0.80 Watts |
Sunday, 2 November 2008
Replacing Macbook Hard Drive
I have just replaced my mac book Hard drive. Originally a Seagate 5400.3 5400RPM 160GB. Cache is ?. Max power is 5v x 0.487a.
The new drive is a Seagate 7200.3 7200RPM 320GB 16MB cache. max power is 5v x 0.62a.
Macbook 5400.3 7200.3
Idle Battery Life 6:23 ?
Average datarate RW 30MB/s ?
The new drive is a Seagate 7200.3 7200RPM 320GB 16MB cache. max power is 5v x 0.62a.
Macbook 5400.3 7200.3
Idle Battery Life 6:23 ?
Average datarate RW 30MB/s ?
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