Re: SDD I/O very low < 10% normal
On Sun, 21 Sep 2014 18:23:36 -0400
KS <lists04@fastmail.fm> wrote:
> Hi all,
>
> I recently reinstalled my system on two SDD that I got (Intel 530
> 240GB -f/w updated and a Kingston SSDNow V300 Series 240GB - f/w
> 520ABFF0 (latest 525ABFF0)). I have the main system running on the
> Intel SSD (LVM) and a partition on the Kingston for my VMs.
>
> Off lately, I have noticed that the VMs (Windows or Linux) take more
> than a minute to give me the login screen. I have destroyed a Linux
> Mint VM completely and reinstalled it with no change in performance.
> My physical system starts up and gives me the login screen in less
> than 30sec!
>
> hdparm gives me the performance of Kingston as below (a normal HDD
> gives 75MB/s buffered reads):
>
> /dev/sdd:
> Timing buffered disk reads: 8 MB in 3.31 seconds = 2.41 MB/sec
>
> while the Intel:
> /dev/sda1:
> Timing buffered disk reads: 186 MB in 0.61 seconds = 304.46 MB/sec
>
> I haven't been able to find a way to install the latest firmware for
> the Kingston yet. Is there anything else that I can change to get it
> to work normally.
>
> Thanks,
> KS
Hi KS,
Over time, SSD's get, for want of a better word, fragmented. Especially
if they endure a lot of writes.
Many times, this "fragmentation" can be corrected. See this:
https://sites.google.com/site/lightrush/random-1/howtoconfigureext4toenabletrimforssdsonubuntu
HTH,
SteveT
Steve Litt * http://www.troubleshooters.com/
Troubleshooting Training * Human Performance
Reply to: