[PVE-User] software RAID in 4.2

Daniel daniel at linux-nerd.de
Mon Jan 23 17:33:56 CET 2017


Hi,

i would say it more a softraid problem.

What you get when you do „cat /proc/mdstat“

Maybe still rebuilding.


> Am 23.01.2017 um 16:35 schrieb Miguel González <miguel_3_gonzalez at yahoo.es>:
> 
> Dear all,
> 
>  I´m running Proxmox 4.2 onto a software RAID of 2 Tb SATA disks of
> 7200 RPM.
> 
>  I have set it up using OVH Proxmox installer with ext4. I have
> realized that another server with just one SATA disk has writes of about
> 140 MB/s while this server with 2 disks has just writes around 40 MB/s:
> 
>  root at nyserver:~# hdparm -Tt /dev/sda
> 
> /dev/sda:
> Timing cached reads:   11800 MB in  2.00 seconds = 5903.84 MB/sec
> Timing buffered disk reads: 136 MB in  3.17 seconds =  42.94 MB/sec
> 
> root at myserver:~# hdparm -Tt /dev/md4
> 
> /dev/md4:
> Timing cached reads:   11356 MB in  2.00 seconds = 5682.49 MB/sec
> Timing buffered disk reads: 132 MB in  3.10 seconds =  42.52 MB/sec
> 
> I´m running 4.4.15-1-pve kernel.
> 
> Is there any way to improve the performance of writes?
> 
> Thanks!
> 
> Miguel
> 
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