Everything? to know about external HDD and Drive Docks.(not
The word "hard" means hard platter and not old floppy flex media.
We use these devices and product below to test HDD under suspension or to back up data. (any)
The time to backup is before your main boot drive gets corrupted ! (or goes BAD)
I use TODO backup (free) to backup all my data or to clone any drive you want. (It works very good, even to recover just one file later, not all at once!) URL link to TODO.
The external DOCK, or enclosure, or a DOCKING STATION , just get this and do not read why it works below, complexity is never simple with computers. ok?
Do know that some folks avoid all this and use cloud storage. (I use private servers local and remote to back up my data and use DOCK's)
This page below is not about turn key, USB backup pocket drives or Backup Plus(tm) type drives already fitted to a tiny case (that mostly just work ok on modern PCs, but not the 100mA version below:
My page is about all PCs working with the best external drive enclosure or interface or dock, you can make one your self. ( or DIY and buy the case, then buy any drive)
Rule #1 is for Hard disk drive enclosure limits is power and current. ( there are 4 levels of current in the spec., but SPINUP current (or peak) is what matters)
The SSD drive has no motor nor any platter nor head servo's to fail so is never a problem.
There are many docking stations, SATA to USB or to eSATA or SATA.
Your PC USB port may not have enough power to run any HDD many old PCs have only 100mA of power on the old lame USB ports and can not run vast classes of HDD.
HDD external can need 200mA to 2 full amps(2000mA) and must not be short changed there. (if you do use my dock below there is no problem here)
If the motor in the external drive is silent the power is NO GOOD !
The bigger (mass) and more platters and faster the HDD spins (RPM) , the higher the startup current will be and can fail; (some very tiny and special HDD 2.5" designed just for the bundled enclosure can be max 300mA rated)
To be sure I read the HDD data sheet at Seagate (I am a 100% fan boy of Seagate since they went in to business 1978 and Alan Shugart) and the ST506 (1980)
Read the Datasheet first, if you want to DIY your own external enclosures.
Some small 2.5" drives are in fact 5vdc only drives and are 200mA motors inside. Again read the spec.s
A good external HDD enclosure like mine runs any drive I want, even power hog 3.5" 10k drives seen here.
The best enclusures made have 2amp or more power pack attached, this is a hard cold fact, not to ignore.
The Mobile ST2000LM007 2TB 2.5" new +5v only drive uses only 1amp to start the motor. (see many specs here look for "SpinUp" current a single word)
My 3.5" 2TB enterprize HDD use more power. ST3000DM001 2.0amp (12v) spinup current , others ST31500341as go as high at 2.8 amps.
This newer modern 2.5: Seagate hdd model , 2TB sizes, ST2000LM007 , run on 5vdc only and needs only 1amp to start the motor, and 0.1 amps idle, and 0.36amp running average.
Even the moblile 5400 RPM Seagate Momentus 5400.6 ST9500325AS , needs 1 full amp to startup and 2.85watts to run.(R/W)
I will not cover the non-sata HDD, I call them USB direct, and have no actual SATA ports real. as seen here, WD passport WD20NMVW.
(the VW means a queer drive, non SATA, but uUSB) WD and Seagate treats these cheap HDD as toys and have no real datasheets at all, but I took them apart and found near real 2.5' HDD inside and real datasheet and startup is 1.1Amps.! I can tell you for a fact my PCs can not do that on any USB port.
The fast cures is in my list at the end of this document, the below the how and why in details .
USB hell: (cured using my special USB enclosure)
Vast models of PC can not ever do USB power demands 100MA to 2amps. (only USB -C can do 2amps)
I have USB current tester and tells me in seconds what power is there, at full load 4.6vdc minium voltage drop (from 5v) and the current it can handle.
The wiki is some help here. See this chart, see 100mA hopeless ports? Many External drives run fine with USB v3. 900mA is concidered minimun on most modern PC. USB -C tops the cake, at full 3amps 15watts.
USB-C can run any drive made.
Wiki made chart, Go USB3 at least. end topic.
The cure is simple use only Enclosures and DOCK's with its own power pack rated 2amps or more. (SOLVED)! or buy the BC1.2 powered hub with a 5amp power pack!
The Choices to pick when buying a dock. (I wll all any enclosure external a dock now)
I call this getting over the SPINUP HUMP: All PCs and for sure gutless USB or any bad enclosure (dock) will fail if power (amps) is not at 2.5amps, the motor will fail to reach full RPM and the drive errors out.(or loops madly)
This is scope view of current (using a current probe here)
The docking station must provide full power at all times to the HDD, using an external power pack
The exception to this is , many turn key data storage devices, use USB port and do work (some don't) but the new ones all do with 1 amp or far less.
The below trucj ub Device monitor allows me to see spec power and actual ("required" 96 is an average only.
Motor spins up, (RPM and platter mass sets current needs)
My fancy external drive, 2TB and one 3TB runs 100% perfect at 2amps, now for 10 years, 2009 to today. with SEAGATE drive inside, 3.5"
See that power jack do not forget to use power and end all problems now. (2Amps or more)
This is one of my drive cases, it also uses eSATA, cables. (and is much faster than USB2)
The Case comes new with large power pack, USE IT AND WIN. the startup battle.
In fact this Case above runs on ANY PC made no issues at all. (over 20 tried , Dell, HP, PCs laptops ,servers all work) Because it is SELF POWERED properly.
Learning point 1:
Old Laptops with 100mA ports will not like to run an HDD directly and charge cell phone battery at the same time, or run 250mA lighted Corsair K55 or K70 keyboard either at the same time.
HACK1: (this can work or not, it is a marginal solution to this problem)
One can increase USB power by 2 times with this cable.
I know for a fact these cables can work, but for a fact it will on work on all HDD made, after all many HDD will not startup with 1 amp. of current. (a fact)
Trick #1, kee the 2 reight ends below on widely spaced USB ports.
The silly USB ports on dirt chip Laptops can be shared ports ! if you overload one port you find out 2 or more go offline. (fun no?)
If the 2 ports you picked are in fact shared (an OEM freak'n secret) it will fail still.
This love to fail because 4-6 ports on any PC are shared, so no current gains (Amps) possible. SO IS USELESS. (unless you know how your Vbus is wired in your PC)
This hack below can work but be sure not to pick 2 shared DC ports (means VBus power is shared 5vdc) or is useless as can be.
If each port is 500mA rated now you have 1amp to start up the motor.
My hard drive external failure list: (dead) (bad drive, dead USB port, bad cables, wrong cables , wrong power pack)
ONE MORE POWER GRAPH (SCOPE VIEWED LIVE
The External HDD is: The drive maker seagate used Ocillicope and a nice current probe to do this, (means it's REAL)
Seagates current 3.5" "Desktop HDD series" (runs 2 to 2.5AMP startup in red below, on the 12vdc line.
This current is huge, and power on 2.5inch is 5watts max but this one is 30watts, 6 times more.!!! 6 Time more power is needed to spin up this large HDD.
This is an Enterprise drive:
The green line is 5vdc turning on .(the step)
The red line is 12vd motor startup current on the ST6000NM0235 drive.
Again these are scope views with current probe on the motor power wire. 2.52 Amps to start up motor (in red)
I hate to tell you USB can not run this drive for POWER. Unless TYPE C or better. (charger current rated USB ports may work here, I have not tried it)
This Drive run great in my powered external case and my DOCK USB and eSTAT both work.
If power is lacking you will hear the HDD try to spin up then fail and spin down , repeats forever and is not good to run any drive like that for more than a minute or 2.
eSATA: (cable connected HDD) (some PC can even hot swap the cable setup correctly)
Some laptops do not have a 12vdc pin on the eSATA port, making the motor dead, on any connected HDD. (unless you connect a 12vdc power pack to the drive.)
I use only 3.5" drives for backup and are enterprise grade, and 2TB or larger. (I also have backup servers at home and on the www )
This Enterprise HDD have longer life spans of + 10 years, unlike toy grade used, laptops 2.5" drives that have 1/2 the life span of good drives. (real SAS drives even better)
MY RECOMENDATIONS: (for Case/enclosure boxes) I like dual sized drives and only with a full 2amp power pack or larger amps. USB3, works for cloning or backup duty)
One more my fast and high powered, enclosure below. (seen this on ebay.com)
ORICO 3.5 inch USB C Hard Drive Enclosure for SATA HDD Support Max 8TB UASP SATARuns my TB-3.5" HDD 6TB at full speeds, 200MB/s in fact more. Nothing faster exists for fastest 6TB HDD on earth.
I have the fastest HDD on earth in the box. From MIGHTY SEAGATE ! WD can go fish. Costs more but IS MORE.
with 12vdc 2.0amp power pack. (read speed in the image are wrong, they have a slow HDD)
Solutions to a dead or flaky HDD external recap'd: Lightning fast cure list:
Once connected you can :
version 5 8-8-2017 (7-7-2020 revised)