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#31
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Added hard drive - but only have 4-pin molex - no available SATA power cables
Mark Lloyd wrote:
On 06/03/2018 05:50 AM, Stephen Wolstenholme wrote: [snip] All my drives are USB powered. They don't need a separate power supply. The one I like most is made by Verbartim. It is a Verbatim 53177 2TB Store and Go. That capacity would have taken up a whole floor when I started working on computers about 40 years ago. How things have changed! Steve About that time I had a job interview at a major aircraft plant. They showed me their computer room, which had 3 washing-machine sized hard drives with a total capacity of 1.5GB. Now I'm trying to imagine 1,3334 times that, as would be required to hold 2TB. Now try to imagine 6,168,094 [1] times this washing-machine sized dis[c|k] drive: http://www.hpmuseum.net/display_item.php?hw=548 We actually sold/ran/supported 32-user systems which had one of these ones. A whopping 10KB per user! [1] I hope I calculated this right. Never mind multiplying/dividing by 1000 versus 1024. |
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#32
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Added hard drive - but only have 4-pin molex - no available SATApower cables
Sam E wrote:
On 06/02/2018 02:47 PM, VanguardLH wrote: [snip] SATA HDD with just the Molex power connector: https://qph.fs.quoracdn.net/main-qim...d9c7ff71f5a7-c So what looks like a SATA power connector must not work. [snip] No, both power connectors work. But the recommendation is not to connect a SATA 15 pin and a Molex 4 pin at the same time. And the "corner case" for this is so obscure, it's hardly worth mentioning. Normal I/O looms will be using the same 12Vn output for powering drives. All the power will be coming from the same 12V and there won't be a loop. There were a few supplies with four independent 12V transformers inside. This would give a 12V1, 12V2, 12V3, 12V4 supply. It was very confusing as to which supply went where. The owner of such a supply, was well advised to find a block diagram of the looms, and make sure it was understood before installing the supply. If (somehow) one drive power source ran off 12V3 and one off 12V4, you wouldn't want current flow between the two connectors, because it could burn something (burn the pins on a connector). It's for that obscure reason, you're not supposed to plug in the SATA 15 pin and the Molex 4 pin on a drive like that, at the same time. The chances of that happening are pretty damn close to zero (cross-flow). Now, a person *could* put two separate ATX supplies in a machine, and run 12V from one supply to the SATA, and 12V from a second supply to the Molex. So that's another way you could encourage cross-flow. Paul |
#33
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Added hard drive - but only have 4-pin molex - no available SATA power cables
On Sun, 3 Jun 2018 10:57:00 -0500, Mark Lloyd
wrote: On 06/03/2018 05:50 AM, Stephen Wolstenholme wrote: [snip] All my drives are USB powered. They don't need a separate power supply. The one I like most is made by Verbartim. It is a Verbatim 53177 2TB Store and Go. That capacity would have taken up a whole floor when I started working on computers about 40 years ago. How things have changed! Steve About that time I had a job interview at a major aircraft plant. They showed me their computer room, which had 3 washing-machine sized hard drives with a total capacity of 1.5GB. Three was a small number. Back in those days (and maybe still today), there were many computer rooms with dozens of such drives. They were often called DASD farms. |
#34
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Added hard drive - but only have 4-pin molex - no available SATA power cables
Peter Jason wrote:
.... I use a quality power board .... https://postimg.cc/image/ng7tr8bgt/ with individual switches. The board is fixed to the wall, to get it off the bench, with plumber's roofing silicone (use a broom handle or similar to hold it until the silicone sets (usually overnight)) and this gives a secure fix without any drilling for screw holes etc. To remove it, use a bread knife of similar to prise it off. I have several, & they work OK; but buy the quality ones. Do you even open that window blind and its window? Things look like they can fall over! :O -- Quote of the Week: "... Here's intelligent things, and it seems they want us for food. First, they'll smash us up -- ships, machines, guns, cities, all the order and organisation. All that will go. If we were the size of ants we might pull through. But we're not. It's all too bulky to stop. That's the first certainty." Eh? ..." --H.G. Wells' The War of the Worlds Note: A fixed width font (Courier, Monospace, etc.) is required to see this signature correctly. /\___/\ Ant(Dude) @ http://antfarm.home.dhs.org / /\ /\ \ Please nuke ANT if replying by e-mail privately. If credit- | |o o| | ing, then please kindly use Ant nickname and URL/link. \ _ / ( ) |
#35
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Added hard drive - but only have 4-pin molex - no available SATA power cables
In message , Paul
writes: Sam E wrote: On 06/02/2018 02:47 PM, VanguardLH wrote: [snip] SATA HDD with just the Molex power connector: https://qph.fs.quoracdn.net/main-qim...d9c7ff71f5a7-c So what looks like a SATA power connector must not work. [snip] No, both power connectors work. I think Sam E was just saying that, if that is the case, VanguardLH's word "just" is incorrect. But the recommendation is not to connect a SATA 15 pin and a Molex 4 pin at the same time. And the "corner case" for this is so obscure, it's hardly worth mentioning. [] Separate 12V supplies. -- J. P. Gilliver. UMRA: 1960/1985 MB++G()AL-IS-Ch++(p)Ar@T+H+Sh0!:`)DNAf I have never liked children, even when I was one. - Miriam Margolyes (RT 2014/11/1-7) |
#36
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Added hard drive - but only have 4-pin molex - no available SATA power cables
Bennett Price wrote:
On 6/3/2018 2:02 AM, Lucifer Morningstar wrote: On Sat, 2 Jun 2018 14:47:50 -0500, VanguardLH wrote: I didn't bother to verify Lucy's claim that there are "still" HDDs around with a Molex power connector. I didn't notice any being currently sold at Newegg; however, Newegg doesn't sell everything currently available, so I've had to go elsewhere for more unique hardware. More unique is impossible as unique means one only. Just get a molex-sata adapter cable: https://goo.gl/JZWkGY https://smile.amazon.com/Power-Cable...+adapter&psc=1 Which I and others already previously mentioned. I only replied in THIS subthread to Char's inquiry about SATA drives with Molex power connectors. |
#37
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Added hard drive - but only have 4-pin molex - no available SATApower cables
On 06/03/2018 03:59 PM, J. P. Gilliver (John) wrote:
[snip] SATA HDD with just the Molex power connector: https://qph.fs.quoracdn.net/main-qim...d9c7ff71f5a7-c Â*So what looks like a SATA power connector must not work. Â*[snip] No, both power connectors work. I think Sam E was just saying that, if that is the case, VanguardLH's word "just" is incorrect. yes [snip] |
#38
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Added hard drive - but only have 4-pin molex - no available SATA power cables
On Sat, 02 Jun 2018 19:42:44 -0500, Char Jackson
wrote: On Sun, 03 Jun 2018 10:28:19 +1000, Peter Jason wrote: On Fri, 01 Jun 2018 22:55:58 -0400, Paul wrote: Peter Jason wrote: You can by-pass all this, and reduce the clutter and tangle by using one of these..... https://www.aliexpress.com/item/2-5-...354341581.html I have two for 3 HDD & an SSD and I'm getting a third for some old IDE HDDs. Note for the power they plug into a wall socket via a small transformer. And how many wall adapters do you have so far ? I have eight of them right now. I don't really have room for any more. There are no good bays left for them. (Some of mine are mounted in 3D, using cross-shaped 1 to 3 adapters.) These things are great. And give you extra mileage from your power strip. You may not be able to use these on adjacent strip outlets, as you need them to be spaced to make room for the height of the adapter. I have around four power strips (the one for the wall adapters is switched). https://www.amazon.com/3-grounded-Ou.../dp/B0065N2T5A ******* Some of the docks aren't properly ballasted so they stay put. They can also transfer vibration to the drive (versus a tray that uses silicon grommets for shock relief). Paul I use a quality power board .... https://postimg.cc/image/ng7tr8bgt/ with individual switches. The board is fixed to the wall, to get it off the bench, with plumber's roofing silicone (use a broom handle or similar to hold it until the silicone sets (usually overnight)) and this gives a secure fix without any drilling for screw holes etc. To remove it, use a bread knife of similar to prise it off. I have several, & they work OK; but buy the quality ones. In your first post, you referred to "reduce the clutter and tangle." After viewing your photo, I see that you were joking. What a mess. .....uh, well you should have seen it before I tidied it up. |
#39
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Added hard drive - but only have 4-pin molex - no available SATA power cables
Sam E wrote:
VanguardLH wrote: SATA HDD with just the Molex power connector: https://qph.fs.quoracdn.net/main-qim...d9c7ff71f5a7-c So what looks like a SATA power connector must not work. Why I mentioned that only ONE of the power connectors should be used on those SATA drives. BOTH are usable but use only ONE. Besides, there is no value in using both power connectors at the same time. I suppose some noobs would see an unused connector and just must fill it. |
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