9 Mar
2022
9 Mar
'22
1:25 p.m.
On 3/9/22 02:44, Patrick O'Callaghan wrote:
Thanks for the detailed info. My current SSD is a Samsung 860 EVO (2TB) so for comparison I did this:
$ time dd if=/dev/zero bs=1G count=23 of=Big 23+0 records in 23+0 records out 24696061952 bytes (25 GB, 23 GiB) copied, 14.9873 s, 1.6 GB/s
real 0m15.087s user 0m0.000s sys 0m14.640s
However that's clearly not a reflection of actual I/O speed as the writes will have been cached.
You can use "conv=fdatasync" to make sure all data is written before giving the final result.