Spinning drive slower at front

[TheNunz]

I ran readspeed on a 10+ year old 750GB laptop drive. The results were
0: 106.2
25%: 101.3
50%: 89.1
75%: 74.4
100: 52.6

I then ran spinrite 6.1 at level 3. When I retested with readspeed, I got the same results.
I thought spinners would have a lower value at the start of the drive?

Are these results indicative a problem?
Should I consider installing the OS in a partition at the end of the drive for better performance?

 

[DanR]

Are these results indicative a problem?

Nope! They are normal for a spinning hard drive. Fastest at the start (outer edge) with max circumference and max data per rev. And slowest at the end (near the spindle) with min circumference and min data per rev. The end speed is roughly half of the start speed and speed varies roughly linearly from start (max) to end (min). Looks like a good drive.

I would expect the post L3 speeds to be slightly faster than the initial speeds, after L3 has refreshed the drive..

 

[TheNunz]

Nope! They are normal for a spinning hard drive. Fastest at the start (outer edge) with max circumference and max data per rev. And slowest at the end (near the spindle) with min circumference and min data per rev. The end speed is roughly half of the start speed and speed varies roughly linearly from start (max) to end (min). Looks like a good drive.

I would expect the post L3 speeds to be slightly faster than the initial speeds, after L3 has refreshed the drive..

I was thinking the #s returned by readspeed was the time it took. Now I realize it is reads per second. It helps to read carefully.
FYI, the drive was recently formatted and had a windows scan run. I assume that is why there was no improvement with L3 scan.

Thanks so much~

 

[peterblaise]

I test ALL my drives to get familiar with the tests.

100 mb/s to 50 mb/s seems typical of a 2.5" hard disk drive.

The fastest is the outer leading track 0, the slowest is the inner track
max.

Except for early IDE drives that have the same number of tracks at
track 0 and track max where the data transfer rate is constant from
beginning to end.

And the interface and drivers matter.

ReadSpeed has no drivers, and so it uses BIOS ( right ? ).

SpinRite can use BIOS or it's own drivers for IDE/ATA, which is faster,
or it's own drivers for AHCI, which is fastest.

If the drive is on a USB adapter, expect ~20 mb/s end-to-end.

Everyone's parts measure slightly differently.

So it makes sense to test everything we've got to know our stuff
well, and to better know when something is out of whack or not.

So how do your other drives measure up?

 

[peterblaise]

... and we can compare to manufacturer's specifications.

So, what kind of drive is that - make and model and attachment type
( IDE/ATA/AHCI/USB ) ?

What does the manufacturer say?