Re: NetBSD SATA raw write speed

[Erik Fair <fair%netbsd.org@localhost>]

Are all those 7200 rpm, or varying? Might also be interesting to know the number of heads/platters.

	curious,

	Erik Fair

> On Nov 17, 2020, at 01:47, David Brownlee <abs%absd.org@localhost> wrote:
> 
> 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]