I'm after a 2.5" Sata 7200rpm HD plus caddy.
Any recommendations?
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I'm after a 2.5" Sata 7200rpm HD plus caddy.
Any recommendations?
Velociraptor?
Heh, that's a bit different then. Although £45 doesn't give you much to play with for the 7.2k rpm 2.5" disk. Much less a caddy as well. Assuming such a disk exists at that price point at all.
Quick check on dabs turned up this: http://www.dabs.com/products/toshiba...0-361720000-11
But it doesn't leave much cash to spare for a caddy. But you can pick up 3.5" to 2.5" brackets in maplin for a few quid.
I've had a look at Scan (can't remember the last time I bought from Dabs) and there are a few 7200rpm 2.5 drives on there + a caddy for under a tenner.
Thank you for your advice ;)
Noob question time :embarrassed:
Will one of the USB splitter cables (the ones usually supplied with 2.5 enclosures) - use two USB ports on the computer provide at least 5.5W of power when connected to the computer?
The Hitachi drive I've seen needs this much power when starting up.
No, according to the USB specifications, each USB port will only pump out 2.5W (5v * 0.5Amps). If you're very very lucky, the USB ports *may* unofficially pump out more current than that, or you may just blow the port controller.
Not worth the gamble IMHO.
I've found an enclosure on ebay which comes with one USB lead which has two connectors so that's 5W and it also has a DC connector and USB lead so that's another 2.5W.
I might give that a try :D
So 3 USB ports to power this device but it's portable :D
Do you think it will be ok connecting to 3 USB ports - enough power?
I suppose alternative is to purchase a power adaptor as well :)
Yeah, to be on the safe side I'd use the power adaptor. Or get a disk which doesn't munch too much power.
why do you want a 7200rpm disk if ur gonna put it into a caddy? try a 4200rpm, will still max out usb bandwidth with much less power
27 quid http://www.novatech.co.uk/novatech/s...tml?NOV-NBHS80
EDIT: i realise this drive is 5200 ... but still lower power
maybe slightly better response time with a higher rpm disk
but usb can only carry a certain bandwidth, never more than 30 MB/s in most cases, so as long as the disk can manage 30MB/s sustained (which most should do) then it'll be fine
What a disaster that experiment was :embarrassed:
A 60GB Toshiba 4200rpm IDE drive in an enclosure managed to copy a 1GB file a few seconds quicker than the 7200rpm SATA drive in an enclosure (both via USB).
could be an issue with power. usb drives run at a certain amperage, usually around 750mA, and 5V. if the drive is using more than this, such as a 7200rpm drive might, it could be almost stunting it's performance compared to a less power hungry drive running at full wack
nice experiment though, what kind of time / bandwidth were you getting?