[kwlug-disc] Using mSata drives

Khalid Baheyeldin kb at 2bits.com
Wed Jan 15 09:29:19 EST 2014


Regarding the lid thing, I always disable it, and restrict sleep to me
explicitly pressing the power button, or sleep automatically if battery is
low (8%), and hibernate if it is critical (2%).

I am on KDE (Kubuntu 12.04), and here is a screen shot to show the power
settings.

There must be something equivalent in Gnome/Unity.

http://i.imgur.com/Y8x7Zq4.png


On Wed, Jan 15, 2014 at 8:48 AM, CrankyOldBugger
<crankyoldbugger at gmail.com>wrote:

> Good lively discussion we have going on here.  Lots of good ideas put
> forth.  Thanks to everyone who kicked in.
>
> I find myself wondering about hibernation, as in the past I've had
> problems with this particular laptop not hibernating correctly.  If you
> close the lid, you will be forced to kill then cold boot the sucker.  So I
> might do more investigating to see if I can use the mSata for hibernating.
>
> And yes, as it shipped, the mSata was meant as a cache for the Windows 8
> install.  I made the system even faster by erasing W8 and installing
> Ubuntu...  Other than the lid closing issue, this laptop seems like it was
> made for Ubuntu.  The OS just dropped in nicely without any issues.
>
> It just seems a shame to not use the mSata, even if it is only 16gig.
>
>
>
> On 15 January 2014 07:28, Chris Craig <kwlug.org at ciotog.net> wrote:
>
>> ... There's still SSD caching, which is what dm-cache would provide. This
>> was the original intent of the drive, from what I can tell. It would likely
>> provide a nice speed boost without needing to have / on it.
>>
>> If the memory stays at 8GB, then Jeff could even use it for both SSD
>> caching and swap/hibernate.
>>
>>
>>
>> On 15 January 2014 00:04, unsolicited <unsolicited at swiz.ca> wrote:
>>
>>> He didn't think it was in use.
>>>
>>> The list recommended no swap at all.
>>>
>>> And if used, not used for swap for premature wear of the SSD.
>>>
>>> Frequently, people want more than 16GB in their system. (Let alone
>>> single spindle backup/restore, pick up/put down.)
>>>
>>> I don't dispute what you say, but it seems we're already out of his
>>> comfort level even dealing with GPT.
>>>
>>> My desktop 120GB SSD (Kubuntu 12.04 LTS) looks to be using 27G, 28G free
>>> (I sliced it in half.) Certainly my jaw drops every so often as to how fast
>>> it is - not having believed stories of SSD speed until I experienced it. So
>>> with only 16GB in his system, some playing around would have to be done,
>>> with some bits here, some bits there. Seems beyond the comfort level.
>>>
>>> Me, I'd be tempted to run it as /, and mirror it to an equivalent spot
>>> on the spindle nightly. But it would take me a while to fiddle with it to
>>> my satisfaction. Such fiddling isn't for everyone.
>>>
>>> So, if not hibernation, not swap, not /, don't know what else to
>>> suggest. (Well, except for as I use the 2nd half of the SSD - when I have a
>>> larger, longer project, I'll dump the files there for the duration. But
>>> that too in the OPs environment could be considered a large waste.) At
>>> least as hibernation, if he hibernates, he's getting what speed he can.
>>>
>>> Certainly SSD as swap seems not recommended, due to premature wear.
>>> (Let alone get /tmp and /var/cache off of it, and so on.)
>>>
>>>
>>> On 14-01-14 07:23 PM, Bob Jonkman wrote:
>>>
>>>>
>>>> Seems a bit of a waste of a high-performance disk to use it only to
>>>> save and restore for hibernation...
>>>>
>>>> On 14-01-14 04:26 PM, unsolicited wrote:
>>>>
>>>>> Use gdisk for info on the gpt disk.
>>>>>
>>>>> Good thought on reserving it for hibernation.
>>>>>
>>>>> On 14-01-14 04:02 PM, Chris Craig wrote:
>>>>>
>>>>>> You'd want to use the mSata drive for hibernation, I presume.
>>>>>>
>>>>>> If you wanted to use it for its intended purpose, maybe look at
>>>>>> dm-cache. Here's a document about setting it up:
>>>>>> http://blog.kylemanna.com/linux/2013/06/30/ssd-caching-
>>>>>> using-dmcache-tutorial/
>>>>>>
>>>>>>
>>>>>
>>>>>>  .
>>>>
>>>>> . .
>>>>>
>>>>
>>>
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>>>
>>
>>
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>
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-- 
Khalid M. Baheyeldin
2bits.com, Inc.
Fast Reliable Drupal
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