NetBSD SATA raw write speed

[David Brownlee <abs%absd.org@localhost>]

I needed to wipe some old disks, and was curious as to the raw write
speed from netbsd-9/amd64 on a HP Gen8 microserver, so I put together
a simple script to dd 1m of nulls to the raw device then read it back.
Included below on the off chance this small sample is of light
interest to anyone else :)

(Format is read speed, write speed, capacity, model, value of
Reallocated_Sector_Ct. Spot the SSD gone bad. Original includes serial
number so I know which Hitachi_HDS5C3020ALA632 to treat with extra
suspicion)

David

161 MB/sec  69 MB/sec 1863 GB ST2000DM001 [16]
150 MB/sec  66 MB/sec  465 GB TOSHIBA_DT01ACA050
151 MB/sec  63 MB/sec 1863 GB TOSHIBA_DT01ACA200 [1]
103 MB/sec  55 MB/sec  232 GB VB0250EAVER [2]
100 MB/sec  55 MB/sec  298 GB TOSHIBA_MQ01ACF032
 93 MB/sec  52 MB/sec  232 GB VB0250EAVER [1]
 98 MB/sec  49 MB/sec 1863 GB Hitachi_HDS5C3020ALA632
 98 MB/sec  49 MB/sec 1863 GB Hitachi_HDS5C3020ALA632
 96 MB/sec  49 MB/sec 1863 GB Hitachi_HDS5C3020ALA632
 96 MB/sec  49 MB/sec 1863 GB Hitachi_HDS5C3020ALA632 [1635]
 95 MB/sec  49 MB/sec 1863 GB Hitachi_HDS5C3020ALA632
 94 MB/sec  48 MB/sec 1863 GB Hitachi_HDS5C3020ALA632
 81 MB/sec  46 MB/sec  465 GB ST95005620AS
 88 MB/sec  45 MB/sec  465 GB ST500LT012 [96]
 50 MB/sec  45 MB/sec  189 GB Maxtor_6B200M0
 84 MB/sec  43 MB/sec 1397 GB SAMSUNG_HD154UI
 86 MB/sec  42 MB/sec 1863 GB WDC_WD20EARS
 82 MB/sec  42 MB/sec 1397 GB SAMSUNG_HD154UI
 49 MB/sec  35 MB/sec  149 GB HITACHI_HTS722016K9SA00
 36 MB/sec  26 MB/sec  149 GB Hitachi_HTS543216L9A300 [592] GONE
 29 MB/sec  20 MB/sec  232 GB FUJITSU_MHX2250BT
205 MB/sec 7.4 MB/sec   59 GB KINGSTON_SNV425S264GB
 82 MB/sec 6.9 MB/sec  465 GB TOSHIBA_MK5061GSY [472]