はじめてのにき

_ NVMe

とかいうものがあるということを教えてもらう。PCにいつのまにか知らない端子が増えてるということに衝撃を受ける

$ sudo hdparm -Tt --direct  /dev/nvme0n1
/dev/nvme0n1:
 Timing O_DIRECT cached reads:   3362 MB in  2.00 seconds = 1683.70 MB/sec
 Timing O_DIRECT disk reads: 5092 MB in  3.00 seconds = 1697.20 MB/sec

速いなー。HDDとSATAのSSDも

$ sudo hdparm -Tt --direct /dev/sda
/dev/sda:
 Timing O_DIRECT cached reads:   948 MB in  2.00 seconds = 473.37 MB/sec
 Timing O_DIRECT disk reads: 634 MB in  3.01 seconds = 210.69 MB/sec
$ sudo hdparm -Tt --direct /dev/sdb
/dev/sdb:
 Timing O_DIRECT cached reads:   910 MB in  2.00 seconds = 454.93 MB/sec
 Timing O_DIRECT disk reads: 1366 MB in  3.00 seconds = 455.12 MB/sec

(01:24)