D420 With SSD and slow hibernation

How come any of my other laptops will hibernate in 5 seconds or less (2gb ram) but this laptop with 32GB SSD drive takes at least 30 seconds.

Pretty much makes hibernation useless.

 

You need to provide a bit of a background. I have a SSD...several actually so, if your system is similar I may be able to assist.

 

While SSD drives have excellent random read speeds, and fair random write speed, their sustained write speed (one big file) is usually fairly poor.

You're likely to see write speeds around 10-20MB per second on a SSD, vs 40-50MB per second on the average 5400 RPM laptop drive.

Unfortunately, the side effect of this is that hibernation takes considerably longer. There isn't really anything you can do to correct it.

 

Thats not entirely correct. If you look at my last few SSD threads you will see that SSDs now pretty much blow away any hard drive in any category. Specifically the memoright has a write speed of over 100mb/s with the mtron just below that.

Sorry... the only write speed of which you speak was that of the Sandisk 5000.

The advantage to the SSD is that there is no decrease in reliability over sustained use... ok here...

The first result shows the memoright SSD at a sustained write of 103mb/s. The next two (Mtron/Seagate) show the decline in performance of a HD compared to a SSD while the last test (Sandisk) shows the original write speed of the first released SSD at 13mb/s.

Hope this clears things up.

 

I've only had personal experience with the older 32GB drives, so you're right.

I would be helpful to know how much memory he's actually using during the point of hibernation. If he's using all 2GB the speed is over 60MB/s, which is great, but I suspect that there is considerably less memory in use. Windows won't copy cached and unused data to the hibernation file on shutdown, and I was basing my speed estimates on roughly 700MB of memory actually used.

 

I need to correct myself as well as I use sleep mode and not hybernate. Is there a difference? My system is set up so when i press my power button, it goes into 'sleep' mode and takes only a sec.

 

Sleep mode allows almost instant shutdown, with the trade off being that the laptop is still drawing a small amount of power to maintain the memory. If the battery goes completely flat, you'll lose whatever you had running.

Hibernation is basically the same as being powered off. The machine copies all of the data from the memory to the hard drive, and then performs a normal power off. When the machine is restarted, the OS will check to see if it was hibernated as part of the boot up process, and then copy all of the data from the hard drive back into memory.

 

I did the ATTO test and the write speed is exactly 10x slower than my 5400RPM hd.

Seems way way off the chart...

 

Wait...what SSD are you using?

 

Here are the ATTO results....

http://tel3deal.com/pics/d420/

I believe its a sandisk 5000 model.

 

Your results are much better than those Ive posted and others as well. It is still a slow write speed and I believe may be condusive of what is occurring, but i will be honest, I cant be sure as i dont use hibernate...which does write everything to the HD befroe completing.

 

My first SSD.... so i have no expirience with performance.

Frankly i'm going to stick with regular HD untill the SSD match the write speed.

 

SSD blows away the write speed but you need the bucks for it...

However, I still would never have given up my Sandisk SSD for any HD. There is too much noticeable difference, especially when you revert back. I dont use hibernate so cant qualify it if you are using that as a grading point. Maybe that would actually be an interesting test with all the SSDs Ive tested.