It also caught my attention, perhaps apart from the logic of the disk, the energy is consumed by the HDD head positioning coil, which has to perform positioning, regardless of whether there is a read or write occurrence, it may confirm an increase in energy consumption during searching, i.e. an extreme case of intensive operation of the for some disks, eg WD RE4 2TB, the search resulted in a significant increase in current consumption in the 12V branch - positioning coil?, and intensive sequential write / read in the 5V branch - logic?).
which must perform positioning, regardless of whether there is writing or reading, this can confirm an increase in energy consumption during searching, i.e. an extreme case of intense work of the positioning mechanism
I have similar thoughts.
interestingly, for some drives, e.g. WD RE4 2TB, the search resulted in a significant increase in current consumption in the 12V branch - positioning coil
Higher voltage -> greater force? (and lower currents to control by the way?) This disk is supposed to be fast, maybe it's one of its secrets?
Respect! I am interested in the short moment of power consumption when switching on the disk. This is probably a very increased consumption for a very short period of time. Well, I deal with sound recording and use the RME UFX interface. It has the additional option of connecting a USB flash drive as a parallel recording system. Unfortunately, the very slow transfer puts into question the recordings with the use of very many traces, there are transmission errors. Contrary to my destiny, I used a 2.5 HDD for this, until after 4 years the interface power supply crashed when turned on. Now I'm thinking about using an SSD there, but I'm still afraid of repeating the situation.
When starting, hard drives can consume more electricity when, for example, they unscrew the plates, large 3.5 "drives with multiple platters could even be configured to slowly unscrew platters, it mattered when, for example, the matrix started up with 24 hard drives.
In smart there was even an error counter called "buzzing" and it concerned a problem with starting the platter drive, it could be caused by problems with the power supply, with the drive itself.
For mechanical drives, you can think of an external power supply, e.g. from a power bank.
As you can see, it all depends on the hard drive and its production date. I have such an invention of the Samsung MZ-5PA064A SSD. It clearly says 5V 1.6A. I wonder how it would come out with the measurements.
SSD Samsung 470 64GB (SATA 3.0Gbps) Sequential Write: 0.488A - 168MB / s Sequential read: 0.304A - 252MB / s This is an old SATA II drive, so the results should come as no surprise.
SSD PNY CS900 120GB SATA III (6Gbps) - purchased 09.2019 Sequential Write: 0.160A - 260MB / s Sequential read: 0.149A - 370MB / s As you can see, a cheap drive for PLN 79 is fine, but it lacks an expensive brand drive.
Samsung 850 EVO SATA III - Purchased at the end of 2015 Sequential Write: 0.361A - 491MB / s Sequential read: 0.396A - 507MB / s