Stephen Morris composed on 2024-11-18 09:07 (UTC+1100):

> For me on my hard disk its giving:

> /dev/sdd:
> Timing cached reads:   52114 MB in  1.99 seconds = 26165.57 MB/sec
> Timing buffered disk reads: 492 MB in  3.01 seconds = 163.69 MB/sec

> and on my SSD it is giving:

> /dev/sdc:
> Timing cached reads:   52352 MB in  1.99 seconds = 26285.62 MB/sec
> Timing buffered disk reads: 1498 MB in  3.00 seconds = 498.96 MB/sec

Try it on individual partitions and you may see more than trivial variation.

# hdparm -t /dev/nvme0n1

/dev/nvme0n1:
 Timing buffered disk reads: 2872 MB in  3.00 seconds = 957.06 MB/sec
# hdparm -t /dev/sdb

/dev/sdb:
 Timing buffered disk reads: 436 MB in  3.00 seconds = 145.19 MB/sec
# hdparm -t /dev/nvme0n1p8

/dev/nvme0n1p8:
 Timing buffered disk reads: 3652 MB in  3.00 seconds = 1216.79 MB/sec
# hdparm -t /dev/sdb7

/dev/sdb7:
 Timing buffered disk reads: 440 MB in  3.01 seconds = 146.41 MB/sec
# hdparm -t /dev/nvme0n1p7

/dev/nvme0n1p7:
 Timing buffered disk reads: 3056 MB in  3.00 seconds = 1018.60 MB/sec
# hdparm -t /dev/sdb8

/dev/sdb8:
 Timing buffered disk reads: 434 MB in  3.00 seconds = 144.51 MB/sec
#
-- 
Evolution as taught in public schools is, like religion,
        based on faith, not based on science.

 Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!

Felix Miata
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