Can the HD's amperage cause HD cable failure?

I've replaced myself the HD with a new HD in my MacBook Pro mid 2010 13" I now have a Western Digital 5400 RPM, 5V 550mA drive installed

I kept having problems with the HD cable, which in fact fails cyclically every 5months.

I have came to the conclusion that it must be related to the amperage of the hard drive of choice. in details:

My old HD (selected by Apple) had an amperage of 700mA probably the one of choice based on the power used by the machine. My current drive has an amperage of 550mA which requires less power. The difference in power overtime frys the cable.

What would you think? How can I rely on the HD sold on ifixit?

thank you, pierluigi

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Italian: Ciao Luigi,

Più alto è l'Ampere, più potenza scorre nel cavo che sì, potrebbe causare i fili riscaldarsi e non riuscire. Pensate a come funziona la tua fusibile di casa se si mette su un carico molto (Amp) sul fusibile che si riscalda e si scioglie.

Ma questo non è il caso qui! L'unità Apple Drive ha un'ampiezza maggiore dell'unità Western Digital (700ma Vs 550mA), quindi se il carico era il problema allora l'unità Apple sarebbe la causa.

OK, quindi perché il mio sistema non funziona?

Consente di esaminare le specifiche dei sistemi (vedi sopra) potrebbe avere una CPU leggermente diversa da quella, ma sono tutte le stesse schede logiche della serie. Consente di esaminare le linee di 'Dimensioni di archiviazione' e 'Interfaccia' che vedrai che l'interfaccia HD di sistema è di SATA II (3.0 Gb / s), quindi devi essere attento a quale unità viene inserita. questa velocità. Per scoprire, è necessario rivedere la scheda specifica dell'unità in questione. Purtroppo, non sappiamo cosa sia l'unità proprio qui, così non riesco a verificare se hai il corretto o no.

Western Digital non sta facendo drive SATA II per un bel po ', quindi indovino che tu abbia un nuovo drive SATA III (6.0 Gb/s). Per aggiungere questo ci sono due tipi di drive Fixed e Auto Sensing Western Digital ha fatto solo Fixed 2,5 "drive. Seagate ha avuto un paio di drive "Auto Sensing" 2,5 (non più come dell'anno scorso). Un'unità di rilevamento automatico ha avuto una logica aggiuntiva per consentirle di lavorare su sistemi SATA II e SATA III a differenza di Drives "fisse" che potrebbero funzionare solo entro la velocità indicata. Quindi dovrai trovare un vecchio drive Seagate SSHD da 2,5 "oppure saltare su un SSD che può ancora trovare le unità" Auto Sense ", ma fai attenzione! Ancora una volta è necessario rivedere le schede di unità specifiche per essere sicuri.

Quanto al cavo HD che troppo potrebbe ancora essere il tuo problema qui. Apple ha un problema poichè la lavorazione del corpo superiore non è stata così buona come doveva essere così la zona che attraversa il cavo come visto qui ha bisogno di un po 'di protezione aggiuntiva. Posiziono il nastro lungo il percorso del cavo dell'unità.

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Aggiungo anche il nastro sotto il cavo mentre si piega sul bordo metallico dell'unità ottica e al lato di ciascuno aggiungo un pezzo di plastica di fogli spesso (3-4 mm) per proteggere il cavo dalla copertura inferiore solo ai lati del cavo al bordo dell'unità ottica meno flessibile. Ora i sistemi che ho risolto sono sbattuti in modo molto pesante, quindi potrebbe non essere necessario farlo se non sei in viaggio con il tuo sistema.

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English: Hi Luigi,

The higher the Amps the more power is flowing in the cable which yes, could cause the wires to heat up and fail. Think of how your house fuse works if you put on to much load (Amps) on the fuse it heats up and melts.

But thats not the case here! The Apple drive has is a higher amperage than the Western Digital drive (700ma Vs 550mA) so if load was the issue then the Apple drive would be the cause.

OK so why is my system failing?

Lets look at your systems specs (see above) you may have a slightly different CPU than this one but they are all the same logic board within the series. Lets look at the 'Storage Dimensions' and the 'Interface' line you'll see your systems HD interface is SATA II (3.0 Gb/s) so you do need to be careful on what drive you put in. The drive needs to support this speed. To find out you need to review the spec sheet of the given drive. Sadly, we don't know what the drive is exactly here so I can't verify if you got the correct one or not.

Western Digital has not been making SATA II drives for quite sometime so I'm guessing you have a newer SATA III (6.0 Gb/s) drive. To add to this there are two kinds of drives Fixed & Auto Sensing Western Digital only made 'Fixed' 2.5" drives. Whereas Seagate had a few 'Auto Sensing' 2.5" drives (not any more as of last year). An Auto Sensing drive had additional logic to allow it to work across SATA II and SATA III systems unlike 'Fixed' Drives which could only run just within the given speed. So you'll need to locate an older 2.5" Seagate SSHD drive or jump to a SSD which can still find 'Auto Sense' drives, but be careful! Again you do need to review the drives spec sheet to be sure.

As for the HD cable that too still could be your issue as well here. Apple does have an issue as the Upper body machining was not as good as it needed to be so the area the cable crosses as seen here needs a bit of added protection. I place tape along the path the drive cable travels.

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I also add tape under the cable as it folds over the metal edge of the optical drive and to the side of each I add a piece of thick sheet plastic (3-4 mm) to protect the cable from the bottom cover just to the sides of the cable at the edge of the optical drive which is less flexible. Now the systems I fix are banged around quite heavily so you may not need to do this if you're not traveling with your system.

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Update (09/26/2017)

Looks good! You indeed have a fixed SATA II (3.0 Gb/s) drive! So that leaves the cable or the logic board which is having problems.

As it does work after replacing the cable I can only guess the cable is still having problems. Lets try going with a different version of the cable as the older cable was not as good as the newer 2012 version: MacBook Pro 13" Unibody (Mid 2012) Hard Drive Cable - Apple P/N 923-0104.

MacBook Pro 13" Unibody (Mid 2012) Hard Drive Cable Image

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To help protect that cable from impact with the bottom case, I also use a very thick type of tape on either side of the cable as it comes over the last step and onto the optical drive.

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Hi there Dan,

thank you a lot for your help and detailed explanation.

I get your point about not being the load the cause of the cable repetitive failure. As a matter of fact, now there is a lower load attached to the slot (550mA instead of the 700mA). Had to clarify that.

However, coming to the connector speed, my WD is a sata II. I have just checked the systems configurations.

When it comes to the mechanical friction by action of the lower case, that s something I have already been dealing with (by protecting the cable) and has not been helping. .

can you think of anything else?

with thanks and kind regards,

pierluigi

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What is your exact WD drives model number? So I can double check.

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hey Dan,

check it out. . http://support.rm.com/productinformation...

what else can we think pls?

thank you

pierluigi

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