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HDD Hotplug Swap System for PATA and SATA

Posted on 2009-05-09
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Last Modified: 2013-11-14
Hello experts,

I have 15 hdds with data on it that a need unfrequently so i don't want to have them all hooked up and eating power all the time.

I'm currently using a ViPower Swaprack system to connect the HDD I need to my system. My model has a SATA host interface and a PATA drive interface so i can hotplug IDE-drives. So far so good.

Since the cost of sata drives dropped below the ide ones i need a storage system that allows me to swap and hotplug ide and sata drives with a sata host interface.

Thanks for any ideas
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Question by:IvoBurkart
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Author Comment

by:IvoBurkart
ID: 24343117
That would be a possibility but i need a solution with some sort of enclosure to protect the drives.
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LVL 34

Expert Comment

by:Michael-Best
ID: 24343146
I dont bother as 2 taped together protect each others interface boards, but if you want USB HDD cases they are available from 1 HDD to many HDDs & start from $20.
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Author Comment

by:IvoBurkart
ID: 24343189
Until now i made the observation that usb 2.0 only allows for about 30 mb/s transfer which is about half of what I get with a current solution. Furthermore I'd like to use the Native Command Queueing capability of SATA drives.

If there is no swap-system solution i'll probably have to buy eSATA cases
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Accepted Solution

by:
Michael-Best earned 2000 total points
ID: 24343207
A server may interest you otherwise a multi HDD enclosure.
HDDs are protected fine if 2 are taped together to protect each others interface boards.

I must go out.
(Regards from : a Kiwi in Tokyo: I troubleshoot & repair: both, English OS & Japanese OS computers)
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LVL 34

Expert Comment

by:Michael-Best
ID: 24346445
"Until now i made the observation that usb 2.0 only allows for about 30 mb/s transfer "
Wrong
USB 2.0 allows up to 480mb/s transfer
http://www.convert-me.com/en/convert/units/data_transfer_rate/data_transfer_rate.dUSBtwo.en.html

HDD: RPM / cache /  transfer speed
May allow less
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LVL 34

Expert Comment

by:Michael-Best
ID: 24346738
Thats:
(480Mbps=Megabits & not MegaBytes per second=about 48MBps).
0
 
LVL 3

Author Comment

by:IvoBurkart
ID: 24347266
And thats without protocol overhead (which eats up to 40% depending on drive usage) and if you are using only one device per usb host conroller. Also most (s)ata-usb-bridges don't allow the full 480mbit on the usb side.

The fact remains: i have never seen a disk at it's full potential using USB 2
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LVL 34

Expert Comment

by:Michael-Best
ID: 24347799
True, I just was giving some extra info, thinking you had MBps &Mbps mixed up.
Cheers
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