[OpenIndiana-discuss] SSDs for OI hipster ZFS root mirror?

[Carl Brewer]

On 14/08/2021 11:37 pm, Bob Friesenhahn wrote:
> On Sat, 14 Aug 2021, Carl Brewer wrote:
>
>>
>> Rather than use a couple of 1TB WD red pros or Blacks, is it a good 
>> choice to run a ZFS root mirror on a couple of SSDs? I figure I'd 
>> only need 250MB or so, all the data etc will be on spinning drives in 
>> a raidZ-something array, the root system - apart from swap, will be 
>> pretty static read-mostly
>>
>> So I'm considering running a couple of Samsung 250GB SSDs, any 
>> thoughts or war stories before I go and buy them? Is it better to 
>> stagger them in terms of age, or different brands/models so they 
>> don't both run out of writes at the same time?  Is this setting me up 
>> for a disaster in 3 years, or will it be predictable and easy to 
>> maintain?
>
> As long as the BIOS is happy and finds the devices, there should be no 
> problems. 


It was happy with the WD green 250GB SATA SSD. I haven't got an m.2 
lying around to check, but I suspect that might be my best bet.


> There are not normally a lot of writes to the ZFS root pool.  It is 
> wise to make sure that the type of product you choose will still exist 
> in the future in case you need to replace it.  SSDs may fail for 
> reasons other than excessive writes.
>
> I am using a pair of Samsung 250GB M.2 SATA SSDs for boot for many 
> years already (since 2015) with no issues.


Are you putting swap onto something else or just letting it use the SSDs?

Thank you

Carl


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