Resolved What is the REAL transfer speed of HDD....?

[MarkC426]

I am looking to transfer my iTunes library to a larger spinner.
Both HDD's are on the mp Sata connections and are 6 Gb/s drives.

What is the REAL speed/time for copying 1.5TB of data....?

 

[tsialex]

It's extremely variable, will be very high throughput for movies and anything of considerable size (depends on your disks, but you will probably see 100MB/s+), slow for audio files (30~50MB/s) and will crawl for the hundreds of thousands small metadata files (1~3MB/s).

My 450GB iTunes library takes overnight to copy to a new disk.

 

[MarkC426]

Thanks, helpful as always.....

I may drag/drop individual folders (music/tv/movies etc) then, rather than a Superduper copy.

 

[MarkC426]

Wow.....holy speed freak Batman.
1.6TB took 2 hours 45 mins.....
Both disks are Seagate Barracuda.

 

[tsialex]

Wow.....holy speed freak Batman.
1.6TB took 2 hours 45 mins.....
Both disks are Seagate Barracuda.

View attachment 2104628

Weird, my iTunes library have "only" 450GB, 90% music, and it's almost 330K files…

 

[MarkC426]

More than 1TB is TV shows.

 

[tsialex]

More than 1TB is TV shows.

Ah, that explains why went so fast and the low number of files.

 

[MarkC426]

I think at last count Music was only about 40GB.
I was expecting an 'all-nighter'.....👍

 

[zedex]

The Seagate Barracudas are exceptionally good value in my opinion. I bought the WD GOLD HDDs for 'better' performance (an extra 30MB/s typical transfer speed) but at twice the price they are poor value for money.