Barracuda XT, Barracuda, Barracuda Green, DiamondMax and other desktop SATA and IDE drives

turn on suggestions Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Reply
Topic Options
rarcher2
Visitor
rarcher2
Posts: 1
Registered: ‎08-22-2011
0

Desktop drives 3.3v supply

Options

‎08-22-2011 06:28 PM

The current range of SATA desktop hard drives all appear to require 5V and 12V from the PC power supply.

 

Can anybody tell me if the desktop SATA range will ever start requiring the 3.3V supply as specified in the SATA standard, and when this change may happen?

 

Thanks for the help.

 

 

Report Inappropriate Content
Message 1 of 3 (4,423 Views)
 
Reply
Moderator
Moderator
AskTheLeaf
Posts: 2,701
Registered: ‎06-13-2011
0

Re: Desktop drives 3.3v supply

Options

‎08-23-2011 12:46 PM

There are no known plans at this point in time to change the power requirements for the drives.

<><><><><><><><><><><><><><><><><><><><><><><><><>
--If you find a user's post useful, please mark it as an Accepted Solution and/or give it a kudo!

--We turn on ideas. Release the hounds.

Give a hoot. Backup your data on a second storage media.
Report Inappropriate Content
Message 2 of 3 (4,411 Views)
 
Reply
Yottabyte
fzabkar
Posts: 4,660
Registered: ‎01-27-2009
0

Re: Desktop drives 3.3v supply

Options

‎08-23-2011 08:08 PM

I have a suspicion that HDD and SSD manufacturers don't trust the quality of the +3.3V rail. In fact most, if not all, HDDs and SSDs generate their own +3.3V supply from the +5V supply via an onboard DC-DC converter. HDDs appear to prefer a linear regulator whereas SSDs use a switchmode type.

HDD ICs that require +3.3V include SDRAMs and serial flash memories, whereas SSDs require +3.3V to power their NAND flash ICs.

Report Inappropriate Content
Message 3 of 3 (4,405 Views)
 
Reply