raid0 read is 2 times slower than in linux

[loki890]

I made a raid0 of 3 old ssd, in linux (kernel 5.4) 'pv * >/dev/null' is ~780Mb/s and in windows copy to NUL gives ~350Mb/s while disks load in taskmanager is 40%/40%/20% (20% on fastest ssd). Its same on CoW and noCow volumes, no compession.

[maharmstone]

Thanks, I'll try to reproduce

[maharmstone]

I've had a look, and can confirm that type file > NUL on Windows is a lot slower than pv file > /dev/null on Linux. But I'm not sure how useful a comparison this is - hardly any time is spent in the drv_read function, and I get similarly poor performance when I try type on NTFS.

[loki890]

I used farmanager's copy to NUL, and I tried far's own copy routine and system. BTW windows's raid0 of 2 ssd is read at 580MB/s (you can't use all 3 disks for stripe in win, which is why I use btrfs)