here's my situation:
I have a dual SATA USB3.0 adapter in JBOD mode with two SSD drives. One is ext4, the other NTFS.
I want to copy/paste a huge folder ( 40GB+ ) from one drive to the other, but I only get 20MB/s!
Both SSDs have much better benchmarks, like 360MB/s writespeed, when tested individually.
I mounted a 600MB ramdisk and copied a single 500MB file from one SSD to it. Then copied the file to the other SSD. The whole transfer took only 5-6 seconds, which matches the benchmarks.
But how can I copy/paste the whole folder that fast?
Is there a magic pipeline command I can use?
Code: Select all
e.g. sudo dd if=/dev/sda1/folder | ramdisk | of=/dev/sdb1/folder
<edit> it seems the uasp-driver requires some extra attention to speed up file transfer. Without uas-driver the speed is 'acceptable' without any voodoo-(remount, big_writes)-stuff