Molex-SATA connector causing thermal issues? SATA splitters: yay or nay?

[Addikt]

Hi Folks,

I currently have a server connected to an old OCZ ModXStream Pro 700W, and I have noted a bit of an issue when using Molex to SATA power converters. Essentially, the base of the drive around the connector is substantially hotter than those connected directly via the original SATA cables. I tried several different adapters, and noticed the same result across different drives, so I feel the PSU itself might be to blame. Furthermore, the connected drive died 6 months thereafter, and as such, I am looking to replace the PSU. Better to be safe than sorry, I figure.

Given that this is a simple file server running Ubuntu Server -- I also use it occasionally for development/testing of server configs -- I figure that 700W is overkill. I found the following on sale:

http://www.ncix.com/detail/seasonic-g-450-gold-450w-atx-49-76941-1338.htm

My problem is that this PSU only has 6 SATA connectors, and I have 7 drives in my system. What are the potential risks of using a splitter, like the following:

http://www.amazon.ca/dp/B0086OGN9E

I don't want to have to spend an additional $60 simply because I need an extra SATA cable (one to power the 7th drive, and perhaps room for the future).

Any feedback is much appreciated. It seems that information on the net regarding this issue is rather sparse.

Thanks.

 

[i7Baby]

As long as they are normal sata drives the splitter should be OK. Drives should only need about 10W each.

 

[Addikt]

What do you mean by "normal SATA drives?" I am using Western Digital Red 3TB drives.

 

[i7Baby]

Then you should be fine.

 

[Sabrewings]

There shouldn't be any reason for an adapter like that to cause heat. The current over those wires is will below their operational max, thus heat should not be coming from the adapter.

I've used adapters like that for years and never had an issue. As a matter of fact, I have the one you linked powering a RAID 5 array in my last PC. Four drives powered from one connector and it all runs cool.

 

[C1]

The heat may simply be due to better conductance of the adapter connector version conducting heat from the drives circuit card. Compare the design & construction of the two sata connectors (including materials).

A possibility is a high resistance of the supply line (12v) within the connector (eg, bad/misaligned or dirty terminal). If there's a supply line voltage drop due to a high resistance, then it should show up during a heavy duty long data access test involving extended simultaneous multiple reads + write(s). In such test, the drive is pulling maximum "juice". (You'll get something like a "cant access drive" or "cant access file xxxxxx" notification as there will be a supply line voltage drop in the connector resulting in insufficient electrical drive power.)